[et_pb_section fb_built=”1″ custom_padding_last_edited=”off|desktop” admin_label=”Header” _builder_version=”4.27.6″ background_color_gradient_direction=”176deg” background_image=”https:\/\/www.microcontrol.net\/wp-content\/uploads\/2021\/10\/MicoControl_Loesungen_Sensor.jpg” width=”90%” custom_margin=”||||false|false” custom_margin_tablet=”||||false|false” custom_margin_phone=”||||false|false” custom_margin_last_edited=”off|phone” custom_padding=”|0px||10vw|false|false” custom_padding_tablet=”||||false|true” background_last_edited=”on|phone” parallax_phone=”off” parallax_method_phone=”off” background_size_phone=”cover” background_position_tablet=”bottom_center” background_position_phone=”bottom_center” custom_css_before=”content:%22%22;|| display: block;|| position: absolute;|| top: 0;|| left: 0;|| width: 100%;|| height: 100%;||background: rgb(0,0,0);||background: linear-gradient(160deg, rgba(0,0,0,0.3) 20%, rgba(255,255,255,0) 50%);|| z-index: 2;” locked=”off” global_colors_info=”{}” custom_css_before_last_edited=”off|desktop” custom_css_before_phone=”content:%22%22;|| display: block;|| position: absolute;|| top: 0;|| left: 0;|| width: 100%;|| height: 100%;||background: rgb(0,0,0);||background: linear-gradient(160deg, rgba(0,0,0,0.3) 20%, rgba(255,255,255,0) 50%);|| z-index: 2;”][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.16″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” width=”100%” custom_margin=”|0px|0px||false|false” custom_padding=”||||false|false” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.microcontrol.net\/wp-content\/uploads\/2021\/08\/MicroControl-Troisdorf-Germany.png” title_text=”MicroControl Troisdorf Germany” show_bottom_space=”off” align=”right” _builder_version=”4.16″ _module_preset=”default” background_enable_image=”off” background_size=”contain” background_position=”bottom_right” module_alignment=”right” custom_margin=”|0px||0px|false|false” custom_padding=”|0px||0px|false|false” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.9.0″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” custom_padding=”0px||0px|||” global_module=”608″ global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_margin=”|auto|-1px|auto||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][lwp_divi_breadcrumbs use_before_icon=”off” link_color=”#ef7c00″ separator_color=”#565655″ current_text_color=”#565655″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][\/lwp_divi_breadcrumbs][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” use_background_color_gradient=”on” background_color_gradient_stops=”#ffffff 0%|#ececec 100%” background_color_gradient_start=”#ffffff” background_color_gradient_end=”#ececec” custom_padding=”0px||30px||false|false” collapsed=”off” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” custom_padding=”||5px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.6″ header_font=”|600|||||||” header_text_color=”#565655″ header_font_size=”36px” header_line_height=”1.1em” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”36px” background_layout=”dark” custom_margin=”||||false|false” custom_padding=”||||false|false” header_font_size_tablet=”48px” header_font_size_phone=”28px” header_font_size_last_edited=”on|desktop” global_colors_info=”{}”]<\/p>\n
[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” custom_margin=”||||false|false” custom_padding=”7px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n
Resistance temperature sensors such as Pt100<\/strong> and Pt1000<\/strong> are among the most widely used sensors in industrial measurement technology. They are particularly well-suited for applications where temperature values need to be measured with precision, stability, and reproducibility. The quality of the measurement depends not only on the sensor itself, but also on the connection type, the design of the measurement input, and the correct linearization of the sensor\u2019s characteristic curve. <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ _module_preset=”default” custom_margin=”||||false|false” custom_padding=”||20px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_id=”was-ist-pt100″ _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n A resistance temperature detector is a temperature sensor whose electrical resistance changes with temperature. The temperature is not measured directly but is determined from the resistance value of the sensor element. <\/p>\n Platinum resistance temperature detectors<\/strong> are predominantly used in industrial applications. Platinum is well-suited for this purpose because the material: <\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” background_color=”#E6E6E6″ custom_margin=”||50px|||” custom_padding=”8px||8px|8px|false|false” border_radii=”on|5px|5px|5px|5px” border_width_all=”1px” global_colors_info=”{}”]Content<\/strong><\/p>\n What is a Resistance Temperature Detector?<\/a> The most common sensor types are:<\/p>\n Both sensor types are well established in industrial practice. In addition, there are also the Pt200<\/strong> (200 ohms at 0 \u00b0C) and Pt500<\/strong> (500 ohms at 0 \u00b0C). MicroControl supports the P1100, Pt200, Pt500, and Pt1000 types with the \u00b5CAN.4.ti-BOX<\/a>; the \u00b5CAN.8.ti-SNAP<\/a> supports Pt100 and Pt1000. <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ _module_preset=”default” use_background_color_gradient=”on” background_color_gradient_stops=”#ffffff 0%|#ececec 100%” background_color_gradient_start=”#ffffff” background_color_gradient_end=”#ececec” custom_padding=”0px||30px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_id=”pt100-messprinzip” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]The measuring principle of a resistance thermometer is based on the change in electrical resistance as a function of temperature. As the temperature rises, the resistance of the platinum sensor element also increases. <\/p>\n To measure temperature, a defined current is passed through the sensor. The resistance can be calculated from the resulting voltage drop. This resistance value is then converted into a temperature value. <\/p>\n A typical measurement chain consists of:<\/p>\n 1. Resistance temperature detector, such as Pt100 or Pt1000 The quality of the measurement result depends not only on the sensor itself, but also on the connection type, the evaluation method, and the overall signal processing.[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ _module_preset=”default” use_background_color_gradient=”on” background_color_gradient_stops=”#ffffff 0%|#ececec 100%” background_color_gradient_start=”#ffffff” background_color_gradient_end=”#ececec” custom_padding=”0px||30px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” custom_margin=”34px|auto|0px|auto|false|false” custom_padding=”7px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_id=”pt100-pt1000″ _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||25px||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]Pt100- and Pt1000 sensors primarily differ in their nominal resistance at 0 \u00b0C.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n A Pt100 has a resistance of 100 ohms at 0 \u00b0C.<\/p>\n Typical features:<\/strong><\/p>\n – widely used in industrial applications [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n A Pt1000 has a resistance of 1000 ohms at 0 \u00b0C.<\/p>\n Typical features:<\/strong><\/p>\n – higher wanted signal compared to Pt100 [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]The choice of the sensor type depends on the application\u2019s operating conditions and the design of the measurement input.[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ _module_preset=”default” use_background_color_gradient=”on” background_color_gradient_stops=”#ffffff 0%|#ececec 100%” background_color_gradient_start=”#ffffff” background_color_gradient_end=”#ececec” custom_padding=”||30px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_id=”pt100-2-leiter” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]Various circuit configurations are possible for connecting resistance temperature detectors. In practice, the key consideration is whether the measurement should be as simple as possible or whether accuracy is the top priority.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n In a 2-wire circuit, the sensor is connected via two wires. The resistance of the connecting wires is directly included in the measurement. <\/p>\n Advantages:<\/strong><\/p>\n – simple setup Limitations:<\/strong><\/p>\n – wire resistance destors the measurement result The 2-wire circuit is therefore particularly suitable for applications where simple connection is a priority, and the accuracy requirements are appropriately adjusted.<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n The 4-wire circuit is the technically sound solution for precise resistance measurements. In this configuration, the current supply and voltage measurement are routed separately. This virtually eliminates the influence of the resistance of the wire on the measurement result. <\/p>\n Advantages:<\/strong><\/p>\n – high measurement accuracy Typical applications:<\/strong><\/p>\n – precision measurements From a technical point of view, a clear distinction often makes sense: 2-wire for simple applications, 4-wire for precision<\/strong>.<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n The 3-wire circuit is used in many industrial applications as a compromise between cost and accuracy. However, it requires the wire resistances to be sufficiently similar to provide a reliable compensation. <\/p>\n Depending on the application, it makes more sense to deliberately avoid this compromise and clearly define the measurement setup:<\/p>\n – 2-wirer<\/strong>, when a simple and cost-effective solution is sufficient This ensures that the design of the measurement chain remains unambiguous and technically transparent.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ _module_preset=”default” use_background_color_gradient=”on” background_color_gradient_stops=”#ffffff 0%|#ececec 100%” background_color_gradient_start=”#ffffff” background_color_gradient_end=”#ececec” custom_padding=”||30px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_id=”pt100-kennlinie” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n An important consideration in temperature measurement using resistance thermometers is the sensor\u2019s characteristic curve. Although the resistance of a Pt sensor changes almost proportional to the temperature in a wide range of applications, the relationship is not linear<\/strong>. <\/p>\n This means that the temperature value cannot be determined with sufficient accuracy across the entire measurement range using a simple linear conversion factor. For precise measurement results, the actual characteristic curve of the sensor must be considered. <\/p>\n This relationship is particularly crucial when higher accuracy requirements or wider temperature ranges are involved.<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]In order to calculate a precise temperature value from the measured resistance value, the nonlinearity of the sensor characteristic curve must be compensated for.<\/p>\n For this purpose, the following resources are typically used:<\/p>\n – stored characteristic curves Lookup tables are a proven method in practice. In this approach, defined resistance values are assigned to the corresponding temperature values. Intermediate values are interpolated mathematically. <\/p>\n This method offers several advantages:<\/p>\n – high accuracy The resistance sensor alone does not provide a directly usable temperature value. Only by correct linearization in the evaluation electronics or software a reliable measurement result is obtained.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n To measure a resistance, a defined current must flow through the sensor element. This current is often referred to as the measurement current<\/strong> or excitation current<\/strong>. <\/p>\n When designing precise measurement inputs, the magnitude of this current is of particular importance. If the measurement current is too high, electrical power will be lost within the sensor. This leads to self-heating<\/strong> of the measurement resistor. <\/p>\n Consequently, the sensor heats up during the measurement process and the measurement no longer captures only the actual process temperature, but also the temperature-increasing effect of the measurement current. <\/p>\n Self-heating is particularly relevant in the following cases:<\/p>\n – small sensor elements For these reasons, for precise 4-wire measurements, the following applies:<\/p>\n – the measurement current must be sufficiently high to produce a stable measurement signal. The design of the measurement input is thus always a technical compromise between signal quality and minimal sensor load.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” use_background_color_gradient=”on” background_color_gradient_stops=”#ffffff 0%|#ececec 100%” background_color_gradient_start=”#ffffff” background_color_gradient_end=”#ececec” custom_padding=”0px||30px||false|false” global_colors_info=”{}”][et_pb_row disabled_on=”off|off|off” _builder_version=”4.24.0″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” custom_margin=”34px|auto|0px|auto|false|false” custom_padding=”7px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.24.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” 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background_color_gradient_end=”#ececec” custom_padding=”0px||30px||false|false” global_colors_info=”{}”][et_pb_row disabled_on=”off|off|off” _builder_version=”4.24.0″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” custom_margin=”34px|auto|0px|auto|false|false” custom_padding=”7px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.24.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text module_id=”pt100-faq” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]The difference is the nominal resistance at 0 \u00b0C. A Pt100 has a resistance of 100 ohms, while a Pt1000 has a resistance of 1000 ohms. This results in differences in signal level and sensitivity to wire resistance.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]The resistance does not increase in a perfectly linear relation to temperature over the entire range. For precise measurements, the actual characteristic curve must be taken into account during data analysis.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]Typically, values are linearized by using characteristic map functions, mathematical approximations, or lookup tables with interpolation in software or firmware.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]Because the voltage drop is measured directly at the sensor, and the wire resistances therefore have virtually no effect on the measurement result.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]The measurement current causes a loss of power within the sensor. This can cause the sensor element to heat up, thereby distorting the measurement result.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]When a simple, cost-effective solution is required and the additional measurement errors caused by wire resistance are within permissible limits.[\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#ef7c00″ text_font_size=”24px” header_2_font=”|600|||||||” header_2_text_color=”#ef7c00″ header_2_font_size=”24px” custom_margin=”||14px||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||50px|||” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n Yes. The sensor is connected between +<\/strong> and –<\/strong> . In addition, the terminal P<\/strong> is bridged to +<\/strong> and terminal G<\/strong> to –<\/strong> . <\/p>\n Please note that even when connected to a 4-wire measurement input, the measurement remains a 2-wire measurement both functionally and metrologically, and the wire resistance is therefore not compensated. <\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ disabled_on=”off|off|off” _builder_version=”4.16″ _module_preset=”default” background_color=”#ef7c00″ custom_margin=”0px||0px||false|false” custom_padding=”48px||48px||false|false” global_colors_info=”{}”][et_pb_row use_custom_gutter=”on” gutter_width=”2″ _builder_version=”4.16″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” module_alignment=”center” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.16″ _module_preset=”default” header_font=”||||||||” header_3_font=”||||||||” header_3_text_align=”left” header_3_text_color=”#ef7c00″ background_color=”#FFFFFF” custom_margin=”||0px||false|false” custom_padding=”10px||0px|10px|false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_5,3_5″ use_custom_gutter=”on” gutter_width=”1″ make_equal=”on” _builder_version=”4.16″ _module_preset=”default” background_color=”RGBA(0,0,0,0)” module_alignment=”center” custom_margin=”0px||||false|false” custom_padding=”0px|1px|0px||false|false” border_color_bottom=”RGBA(0,0,0,0)” global_colors_info=”{}”][et_pb_column type=”2_5″ _builder_version=”4.16″ _module_preset=”default” background_color=”rgba(0,0,0,0.08)” border_width_bottom=”2px” border_color_bottom=”#FFFFFF” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.microcontrol.net\/wp-content\/uploads\/2021\/08\/MicroControl_Produktanfrage.jpg” title_text=”MicroControl_Product inquiry” align=”center” force_fullwidth=”on” _builder_version=”4.16″ _module_preset=”default” background_enable_image=”off” background_size=”initial” module_alignment=”center” custom_margin=”||0px||false|false” custom_padding=”|0px||0px|false|false” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.16″ _module_preset=”default” background_color=”rgba(0,0,0,0.08)” border_width_bottom=”2px” border_color_bottom=”#FFFFFF” global_colors_info=”{}”][et_pb_cta title=”+49 2241 – 25 65 9 – 0″ button_url=”mailto:sales.int@microcontrol.net?subject=Request%20information” button_text=”Message” _builder_version=”4.23.4″ _module_preset=”default” header_level=”h3″ header_font=”|700|||||||” header_text_color=”#FFFFFF” body_text_color=”#3a3a3a” body_font_size=”16px” body_line_height=”1.6em” background_color=”RGBA(0,0,0,0)” custom_button=”on” button_text_size=”20px” button_text_color=”#ef7c00″ button_bg_color=”#FFFFFF” button_border_width=”0px” button_border_color=”#FFFFFF” button_border_radius=”6px” button_letter_spacing=”1px” button_alignment=”center” button_custom_padding=”||||false|false” custom_margin=”0px||||false|false” custom_padding=”30px||30px||false|false” border_color_top=”#FFFFFF” border_color_bottom=”#FFFFFF” global_colors_info=”{}”]<\/p>\n Write an email or give us a call.<\/p>\n [\/et_pb_cta][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"What is a Resistance Temperature Detector?<\/h2>\n
\n
\nMeasuring Principle of Resistance Temperature Detectors<\/a>
\nPt100 and Pt1000<\/a>
\n2-wire or 4-wire<\/a>
\nSensor Characteristic Curve<\/a>
\nFAQ: Temperature Measurement with Resistance Temperature Detectors<\/a>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text disabled_on=”off|off|off” _builder_version=”4.27.6″ _module_preset=”default” text_font=”|300|||||||” text_text_color=”#565655″ text_font_size=”17px” text_line_height=”1.4em” custom_margin=”||20px||false|false” custom_padding=”0px||||false|false” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n\n
Measuring Principle of Resistance Temperature Detectors<\/h2>\n
\n2. Connection cable
\n3. Measurement input or transducer
\n4. Controller, display, or data acquisition system<\/p>\nPt100 and Pt1000<\/h2>\n
Pt100<\/h3>\n
– high accuracy
– established standard in many measurement systems<\/p>\nPt1000<\/h3>\n
– lower relative influence of the wire impedance
– advantageous in many electronic evaluation circuits<\/p>\n2-Wire or 4-Wire<\/h2>\n
2-Wire-Circuit<\/h3>\n
– low wiring effort
– cost-effective solution for standard applications<\/p>\n
– particularly relevant for long wires and small changes in resistance<\/p>\n4-Wire Circuit<\/h3>\n
– precise and reproducible resistance measurement
– suitable for demanding measurement tasks<\/p>\n
– laboratory and test engineering
– industrial application with high requirements for accuracy and stability<\/p>\nWhy we can do without a 3-wire System<\/h3>\n
– 4-Leiter<\/strong>, when precise measurement results are required<\/p>\nSensor Characteristic Curve<\/b><\/h2>\n
Linearization Using Software and Lookup Tables<\/b><\/h3>\n
\n– mathematical approximations
\n– lookup tables with interpolation<\/p>\n
\n– reproducible behaviour
\n– low computational effort
\n– simple implementation in firmware or software<\/p>\nMeasurment Current and Self-Heating<\/b><\/h3>\n
– poor heat dissipation
– stationary media
– high-precision measurements<\/p>\n
– at the same time, it must remain low enough to minimize the sensor’s self-heating process.<\/p>\nMeasurement technology solutions from MicroControl<\/h2>\n
FAQ: Temperature Measurement with Resistande Temperature Detectors<\/h2>\n
What is the difference between a Pt100 and Pt1000? <\/b><\/h3>\n
Why is the Characteristic curve not simply linear? <\/b><\/h3>\n
How is linearization performed in practice? <\/b><\/h3>\n
Why is the 4-wire circuit more accurate? <\/b><\/h3>\n
What is meant by self-heating? <\/b><\/h3>\n
When is a 2-wire measurement sufficient? <\/b><\/h3>\n
Can a 2-wire Pt100 or Pt1000 be connected to a 4-wire measurement input? <\/b><\/h3>\n
You would like to get more information?<\/h3>\n