{"id":6981,"date":"2026-07-17T16:58:12","date_gmt":"2026-07-17T16:58:12","guid":{"rendered":"https:\/\/europascal.de\/product\/additel-accumac-am-1751\/"},"modified":"2026-10-14T10:36:47","modified_gmt":"2026-10-14T10:36:47","slug":"additel-accumac-am-1751","status":"publish","type":"product","link":"https:\/\/europascal.de\/en\/product\/additel-accumac-am-1751\/","title":{"rendered":"Additel AccuMac AM 1751 Precise Reference Thermometer"},"content":{"rendered":"<p>The <strong>Additel AccuMac AM 1751<\/strong> is a high-quality secondary reference platinum resistance thermometer designed for accurate temperature measurements and professional temperature calibration applications.<\/p>\n<p>With a temperature range from <strong>\u2212200 \u00b0C to +670 \u00b0C<\/strong>, excellent short-term stability of <strong>less than 0.007 \u00b0C<\/strong> and a robust Inconel sheath, the AccuMac AM 1751 provides reliable performance for demanding laboratory and industrial applications.<\/p>\n<p>The thermometer meets the relevant ITS-90 criteria for reference thermometers and is supplied with an ISO\/IEC 17025 accredited calibration.<\/p>\n<p>Its combination of measurement stability, mechanical durability and a wide temperature range makes it an excellent choice for calibration laboratories, temperature metrology and industrial quality assurance.<\/p>\n<p>The AccuMac AM 1751 is particularly suitable for use with precision thermometer readouts, calibration baths, dry block calibrators and comparison calibration systems.<\/p>\n<p>For professional temperature calibration and metrological traceability, visit the <a href=\"https:\/\/europascal.de\/en\/calibration-services\/\">europascal Calibration Service<\/a>.<\/p>\n<h2>Your Benefits at a Glance<\/h2>\n<ul>\n<li>Secondary reference platinum resistance thermometer<\/li>\n<li>Wide temperature range from \u2212200 \u00b0C to +670 \u00b0C<\/li>\n<li>Excellent short-term stability below 0.007 \u00b0C<\/li>\n<li>Robust Inconel protective sheath<\/li>\n<li>Meets ITS-90 criteria for reference thermometers<\/li>\n<li>ISO\/IEC 17025 accredited calibration included<\/li>\n<li>Suitable for precision temperature measurements<\/li>\n<li>Designed for comparison calibration<\/li>\n<li>Suitable for calibration baths<\/li>\n<li>Suitable for dry block calibrators<\/li>\n<li>Compatible with suitable precision resistance thermometer readouts<\/li>\n<li>Suitable for laboratory temperature metrology<\/li>\n<li>Durable construction for demanding applications<\/li>\n<li>Cost-effective reference thermometer solution<\/li>\n<li>Suitable for industrial quality assurance<\/li>\n<li>Professional calibration support from europascal<\/li>\n<\/ul>\n<h2>Ideal for Demanding Calibration Applications<\/h2>\n<p>The <strong>AccuMac AM 1751<\/strong> is designed for applications requiring a reliable reference thermometer over a wide temperature range.<\/p>\n<p>Secondary reference thermometers are commonly used in calibration laboratories to determine the temperature of a controlled calibration environment.<\/p>\n<p>Typical applications include the calibration of industrial platinum resistance thermometers, temperature probes, digital thermometers and temperature measurement systems.<\/p>\n<p>The AccuMac AM 1751 can be used as a reference thermometer in suitable liquid calibration baths and dry block calibrators.<\/p>\n<p>During a comparison calibration, the reference thermometer and the device under test are placed in a stable temperature environment.<\/p>\n<p>The resistance of the AccuMac AM 1751 is measured using a suitable precision thermometer readout.<\/p>\n<p>The measured resistance is converted into temperature using the appropriate calibration coefficients.<\/p>\n<p>The temperature indicated by the device under test can then be compared with the reference temperature.<\/p>\n<p>This method enables accurate and traceable temperature calibration when the complete measurement system is properly characterized.<\/p>\n<h2>Temperature Range from \u2212200 \u00b0C to +670 \u00b0C<\/h2>\n<p>The AccuMac AM 1751 provides an exceptionally wide temperature measurement range.<\/p>\n<p><strong>\u2212200 \u00b0C to +670 \u00b0C<\/strong><\/p>\n<p>This range makes the thermometer suitable for low-temperature and high-temperature calibration applications.<\/p>\n<p>Typical calibration temperatures include:<\/p>\n<ul>\n<li>\u2212196 \u00b0C<\/li>\n<li>\u221280 \u00b0C<\/li>\n<li>\u221240 \u00b0C<\/li>\n<li>0 \u00b0C<\/li>\n<li>100 \u00b0C<\/li>\n<li>200 \u00b0C<\/li>\n<li>300 \u00b0C<\/li>\n<li>400 \u00b0C<\/li>\n<li>500 \u00b0C<\/li>\n<li>600 \u00b0C<\/li>\n<li>670 \u00b0C<\/li>\n<\/ul>\n<p>The actual usable temperature range depends on the calibration equipment, thermometer readout and measurement procedure.<\/p>\n<p>The wide operating range allows the AccuMac AM 1751 to serve as a versatile reference thermometer for different temperature calibration systems.<\/p>\n<p>This reduces the need for separate reference thermometers covering individual temperature ranges.<\/p>\n<h2>Excellent Short-Term Stability<\/h2>\n<p>The AccuMac AM 1751 offers excellent short-term temperature stability.<\/p>\n<p>The manufacturer specifies:<\/p>\n<p><strong>&lt; 0.007 \u00b0C<\/strong><\/p>\n<p>This characteristic is particularly important for precision temperature measurements.<\/p>\n<p>A reference thermometer should provide repeatable resistance values under stable temperature conditions.<\/p>\n<p>Short-term stability helps minimize variations during repeated measurements and comparison calibrations.<\/p>\n<p>However, short-term stability must not be confused with absolute temperature accuracy or calibration uncertainty.<\/p>\n<p>The total measurement uncertainty depends on the calibration certificate, resistance measurement instrument, temperature environment and measurement procedure.<\/p>\n<p>For demanding applications, the complete uncertainty budget should be evaluated according to recognized metrological principles.<\/p>\n<h2>Secondary Reference Platinum Resistance Thermometer<\/h2>\n<p>The AccuMac AM 1751 is classified as a secondary reference platinum resistance thermometer.<\/p>\n<p>Platinum resistance thermometers are widely used in temperature metrology because platinum provides a stable and reproducible relationship between electrical resistance and temperature.<\/p>\n<p>A secondary reference thermometer is typically used as a working reference in calibration laboratories.<\/p>\n<p>It provides a practical balance between measurement performance, durability and cost.<\/p>\n<p>The AccuMac AM 1751 is designed for applications requiring reliable temperature measurements without necessarily using a more delicate primary standard thermometer.<\/p>\n<p>It is suitable for routine comparison calibrations, reference measurements and laboratory temperature monitoring.<\/p>\n<h2>ITS-90 Reference Thermometer<\/h2>\n<p>The AccuMac AM 1751 meets the relevant criteria of the International Temperature Scale of 1990.<\/p>\n<p><strong>ITS-90<\/strong><\/p>\n<p>ITS-90 provides an internationally recognized framework for realizing and disseminating temperature measurements.<\/p>\n<p>Platinum resistance thermometers play an important role in this temperature scale.<\/p>\n<p>When a suitable reference thermometer is calibrated at defined temperature points, its resistance-temperature relationship can be characterized using appropriate interpolation equations.<\/p>\n<p>The AccuMac AM 1751 is designed to support traceable temperature measurements based on these principles.<\/p>\n<p>The specific calibration coefficients and applicable temperature intervals should be taken from the individual calibration certificate.<\/p>\n<h2>Robust Inconel Protective Sheath<\/h2>\n<p>The AccuMac AM 1751 features a protective sheath manufactured from Inconel.<\/p>\n<p>Inconel is a nickel-based alloy known for its mechanical strength and resistance to demanding environmental conditions.<\/p>\n<p>The protective sheath helps protect the sensitive platinum sensing element.<\/p>\n<p>This makes the thermometer suitable for applications requiring repeated insertion into calibration baths or dry block calibrators.<\/p>\n<p>The robust construction is particularly advantageous in laboratories where reference thermometers are used frequently.<\/p>\n<p>Nevertheless, careful handling remains essential.<\/p>\n<p>Mechanical shocks, excessive bending and thermal stress should be avoided to maintain the thermometer&#8217;s calibration characteristics.<\/p>\n<h2>ISO\/IEC 17025 Accredited Calibration Included<\/h2>\n<p>The AccuMac AM 1751 is supplied with an ISO\/IEC 17025 accredited calibration.<\/p>\n<p>This provides documented metrological traceability for the individual thermometer.<\/p>\n<p>An accredited calibration certificate contains the calibration results and the associated measurement uncertainties.<\/p>\n<p>Depending on the calibration procedure, the certificate may also provide the coefficients required to calculate temperature from measured resistance.<\/p>\n<p>These individual calibration data are essential for high-accuracy temperature measurements.<\/p>\n<p>The calibration uncertainty should always be considered separately from the manufacturer&#8217;s short-term stability specification.<\/p>\n<p>Regular recalibration is recommended according to the requirements of the laboratory&#8217;s quality management system.<\/p>\n<h2>Suitable for Precision Thermometer Readouts<\/h2>\n<p>The AccuMac AM 1751 is a resistance thermometer.<\/p>\n<p>It does not contain an integrated temperature display.<\/p>\n<p>To measure temperature, the thermometer must be connected to a suitable precision resistance thermometer readout.<\/p>\n<p>The readout measures the electrical resistance of the platinum sensing element.<\/p>\n<p>The measured resistance is then converted into temperature using the appropriate calibration coefficients.<\/p>\n<p>For accurate measurements, a precision readout with suitable resistance measurement accuracy and resolution should be selected.<\/p>\n<p>A four-wire measurement configuration is generally preferred for precision platinum resistance thermometers because it reduces the influence of lead resistance.<\/p>\n<p>The electrical compatibility of the thermometer and readout must be verified before use.<\/p>\n<h2>Comparison Calibration in Liquid Baths<\/h2>\n<p>The AccuMac AM 1751 is suitable for comparison calibration in appropriate liquid temperature baths.<\/p>\n<p>Liquid calibration baths provide a controlled temperature environment with good thermal contact between the reference thermometer and the devices under test.<\/p>\n<p>The AccuMac AM 1751 is inserted into the bath together with the temperature sensors being calibrated.<\/p>\n<p>After sufficient stabilization, the reference temperature is determined using the calibrated resistance thermometer.<\/p>\n<p>The temperature indications of the devices under test are compared with this reference value.<\/p>\n<p>For accurate measurements, the bath&#8217;s temperature stability and spatial uniformity must be considered.<\/p>\n<p>The immersion depth of the reference thermometer is also important.<\/p>\n<h2>Reference Measurements in Dry Block Calibrators<\/h2>\n<p>The AccuMac AM 1751 can also be used with suitable dry block temperature calibrators.<\/p>\n<p>Dry block calibrators generate controlled temperatures using a heated or cooled metal block.<\/p>\n<p>The reference thermometer is inserted into a calibration insert together with the device under test.<\/p>\n<p>This enables comparison measurements without requiring calibration liquids.<\/p>\n<p>The AccuMac AM 1751 is particularly useful when an external reference thermometer is needed to determine the actual calibration temperature.<\/p>\n<p>The measurement uncertainty must account for the temperature distribution of the dry block, sensor immersion effects and thermal contact.<\/p>\n<h2>Temperature Calibration According to ISO\/IEC 17025<\/h2>\n<p>The AccuMac AM 1751 is suitable for use in temperature calibration systems operated according to ISO\/IEC 17025.<\/p>\n<p>Accredited calibration laboratories require reliable measurement standards and documented metrological traceability.<\/p>\n<p>The reference thermometer forms an important part of the measurement chain.<\/p>\n<p>Its calibration uncertainty contributes to the overall uncertainty of the calibration process.<\/p>\n<p>Other uncertainty contributions may include:<\/p>\n<ul>\n<li>Precision thermometer readout uncertainty<\/li>\n<li>Temperature stability<\/li>\n<li>Temperature uniformity<\/li>\n<li>Sensor immersion effects<\/li>\n<li>Thermal contact<\/li>\n<li>Reference thermometer drift<\/li>\n<li>Measurement repeatability<\/li>\n<li>Self-heating effects<\/li>\n<\/ul>\n<p>A complete uncertainty evaluation helps ensure reliable calibration results.<\/p>\n<h2>Technical Highlights<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Specification<\/th>\n<th>AccuMac AM 1751<\/th>\n<\/tr>\n<tr>\n<td>Manufacturer<\/td>\n<td>AccuMac<\/td>\n<\/tr>\n<tr>\n<td>Model<\/td>\n<td>AM 1751<\/td>\n<\/tr>\n<tr>\n<td>Product type<\/td>\n<td>Secondary Reference Platinum Resistance Thermometer<\/td>\n<\/tr>\n<tr>\n<td>Temperature range<\/td>\n<td>\u2212200 \u00b0C to +670 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Short-term stability<\/td>\n<td>&lt; 0.007 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Sensor technology<\/td>\n<td>Platinum resistance thermometer<\/td>\n<\/tr>\n<tr>\n<td>Protective sheath<\/td>\n<td>Inconel<\/td>\n<\/tr>\n<tr>\n<td>Temperature scale<\/td>\n<td>ITS-90<\/td>\n<\/tr>\n<tr>\n<td>Accredited calibration<\/td>\n<td>ISO\/IEC 17025 included<\/td>\n<\/tr>\n<tr>\n<td>Measurement principle<\/td>\n<td>Electrical resistance<\/td>\n<\/tr>\n<tr>\n<td>Temperature display<\/td>\n<td>External readout required<\/td>\n<\/tr>\n<tr>\n<td>Typical applications<\/td>\n<td>Temperature reference measurements<\/td>\n<\/tr>\n<tr>\n<td>Calibration method<\/td>\n<td>Comparison calibration<\/td>\n<\/tr>\n<tr>\n<td>Suitable calibration equipment<\/td>\n<td>Liquid baths and dry block calibrators<\/td>\n<\/tr>\n<tr>\n<td>Typical users<\/td>\n<td>Calibration laboratories and industrial metrology<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The manufacturer confirms the temperature range, short-term stability, Inconel sheath, ITS-90 suitability and included accredited calibration.<\/p>\n<p>Additional specifications such as nominal resistance, probe diameter, probe length, connector type and individual calibration coefficients should be confirmed for the selected configuration.<\/p>\n<h2>Calibration Service by europascal<\/h2>\n<p>Regular calibration is essential for maintaining reliable and traceable temperature measurements.<\/p>\n<p>europascal supports customers with professional temperature calibration equipment and calibration services.<\/p>\n<p>The AccuMac AM 1751 can be integrated into a temperature calibration system together with suitable precision thermometer readouts, calibration baths and dry block calibrators.<\/p>\n<p>For demanding temperature calibration applications, the complete measurement uncertainty must be evaluated.<\/p>\n<p>The reference thermometer&#8217;s calibration certificate provides important information for establishing metrological traceability.<\/p>\n<p>The recalibration interval should be selected according to the thermometer&#8217;s usage, stability history and quality management requirements.<\/p>\n<p>For professional calibration services and technical support, visit the <a href=\"https:\/\/europascal.de\/en\/calibration-services\/\">europascal Calibration Service<\/a>.<\/p>\n<h2>Why Choose the AccuMac AM 1751?<\/h2>\n<p>The AccuMac AM 1751 combines a wide temperature range, excellent short-term stability and robust mechanical construction.<\/p>\n<p>Its operating range from \u2212200 \u00b0C to +670 \u00b0C makes it suitable for numerous laboratory and industrial temperature calibration applications.<\/p>\n<p>The specified short-term stability below 0.007 \u00b0C supports repeatable reference measurements.<\/p>\n<p>The Inconel protective sheath provides durability for demanding applications.<\/p>\n<p>The included ISO\/IEC 17025 accredited calibration supports documented metrological traceability.<\/p>\n<p>The thermometer meets the relevant ITS-90 criteria for reference thermometers and can be used with suitable precision resistance thermometer readouts.<\/p>\n<p>For calibration laboratories and industrial users requiring a reliable secondary reference thermometer, the AccuMac AM 1751 provides a practical combination of measurement performance, flexibility and durability.<\/p>\n<p>europascal supports customers in selecting suitable temperature calibration equipment and establishing reliable calibration processes.<\/p>\n<h2>Typical Applications for the AccuMac AM 1751<\/h2>\n<p>The AccuMac AM 1751 is suitable for professional temperature measurement and calibration applications.<\/p>\n<p>Typical applications include:<\/p>\n<ul>\n<li>Reference temperature measurements<\/li>\n<li>Pt100 calibration<\/li>\n<li>Pt1000 calibration<\/li>\n<li>Industrial RTD calibration<\/li>\n<li>Precision thermometer calibration<\/li>\n<li>Comparison calibration<\/li>\n<li>Liquid bath calibration<\/li>\n<li>Dry block calibration<\/li>\n<li>Temperature metrology<\/li>\n<li>Accredited calibration laboratories<\/li>\n<li>Industrial quality assurance<\/li>\n<li>Research and development<\/li>\n<li>Laboratory temperature measurements<\/li>\n<li>Calibration system verification<\/li>\n<li>Temperature sensor characterization<\/li>\n<\/ul>\n<p>The combination of excellent short-term stability, wide temperature range and robust construction makes the AccuMac AM 1751 a reliable secondary reference thermometer for professional temperature metrology.<\/p>\n<p><a href=\"https:\/\/europascal.de\/en\/\">Find more temperature measurement equipment at europascal.<\/a><\/p>\n<p>Manufacturer information for the AccuMac AM 1751 can be found on the <a href=\"https:\/\/www.accumac.com\/am1751\" target=\"_blank\" rel=\"noopener\">official AccuMac website<\/a>.<\/p>\n<p><a class=\"download-datasheet\" href=\"#\" data-pdf=\"https:\/\/europascal.de\/wp-content\/uploads\/2026\/07\/Additel-AccuMac-AM1751-Secondary-Reference-Prts-20250226.pdf\"> <span style=\"color: #0000ff;\"><strong><em>Download Datasheet<\/em><\/strong><\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The <strong>Additel AccuMac AM 1751<\/strong> is a precise secondary reference platinum resistance thermometer with a temperature range from <strong>\u2212200 \u00b0C to +670 \u00b0C<\/strong>. Featuring short-term stability of <strong>&lt; 0.007 \u00b0C<\/strong>, a robust Inconel sheath and an included <strong>ISO\/IEC 17025 accredited calibration<\/strong>, it is ideal for precision temperature measurements and professional calibration laboratories.<\/p>\n","protected":false},"featured_media":3425,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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