{"id":1875,"date":"2023-08-01T14:26:40","date_gmt":"2023-08-01T14:26:40","guid":{"rendered":"https:\/\/calibration.consulting\/product\/isotech-909-family-working-sprts-thermometers\/"},"modified":"2025-12-08T14:34:54","modified_gmt":"2025-12-08T14:34:54","slug":"isotech-909-family-working-sprts-thermometers","status":"publish","type":"product","link":"https:\/\/calibration.consulting\/en\/product\/isotech-909-family-working-sprts-thermometers\/","title":{"rendered":"Isotech 909 Family Working SPRTs Thermometers"},"content":{"rendered":"

The Isotech<\/a> 909 Family offers a range of Platinum Resistance Thermometers (SPRTs) as a work standard designed for primary and secondary laboratories. These thermometers combine high accuracy, reliability and a wide temperature range from -196\u00b0C to 670\u00b0C, making them ideal for precision calibrations in a laboratory environment.<\/p>\n

Excellent Stability and Durable Design<\/h3>\n

The Model 909 SPRTs feature a pure platinum resistance element, carefully wound and mounted in a stress-free construction. This prevents internal stress and ensures long-term stability. The element is encapsulated in a pure aluminum housing, which is preconditioned to minimize contamination and mechanical stress.<\/p>\n

All splices are carefully welded to prevent resistance fluctuations. The thermometers feature silver-plated, multicore wires with low-loss insulation cable, ensuring reliable signal transmission.<\/p>\n

Various Models and Materials<\/h3>\n

The 909 series includes several models, each optimized for specific applications:<\/p>\n\n\n\n\n\n\n\n
Model<\/strong><\/td>\nResistance<\/strong><\/td>\nTemperature range<\/strong><\/td>\nOuter Jacket<\/strong><\/td>\nFeatures<\/strong><\/td>\n<\/tr>\n<\/thead>\n
909Q<\/strong><\/td>\n25.5\u03a9 \/ 100\u03a9<\/td>\n-196\u00b0C tot 670\u00b0C \/ -196\u00b0C to 550\u00b0C<\/td>\nQuartz<\/strong><\/td>\nVisible internal components, recommended by Isotech<\/strong><\/td>\n<\/tr>\n
909H<\/strong><\/td>\n25.5\u03a9 \/ 100\u03a9<\/td>\n-80\u00b0C to 670\u00b0C \/ -80\u00b0C to 550\u00b0C<\/td>\nMetal<\/strong><\/td>\nMetal Durable, internal alumina protection<\/strong><\/td>\n<\/tr>\n
909L<\/strong><\/td>\n25.5\u03a9 \/ 100\u03a9<\/td>\n-196\u00b0C to 165\u00b0C<\/td>\nMetal<\/strong><\/td>\nMetal Optimized for low temperatures<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

All models are available in three lengths: 480 mm, 550 mm and 600 mm, with a sensor length of 65 mm.<\/p>\n

Optimal Calibration and ITS-90 Standards<\/h3>\n

The Model 909 SPRTs come standard with a certificate listing the RTPW and Wga value. Optionally, they can also be supplied with a UKAS calibration based on ITS-90 fixed points:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Fixed point<\/strong><\/td>\nTemperature (\u00b0C)<\/strong><\/td>\nTypical Uncertainty (k=2)<\/strong><\/td>\n<\/tr>\n<\/thead>\n
Boiling point Nitrogen<\/strong><\/td>\n-195,798<\/td>\n\u00b15mK<\/td>\n<\/tr>\n
Triple point Kwik<\/strong><\/td>\n-38,8344<\/td>\n\u00b11mK<\/td>\n<\/tr>\n
Triple point Water<\/strong><\/td>\n0,01<\/td>\n\u00b10,5mK<\/td>\n<\/tr>\n
Melting point Gallium<\/strong><\/td>\n29,7646<\/td>\n\u00b11mK<\/td>\n<\/tr>\n
Fixed point Indium<\/strong><\/td>\n156,5985<\/td>\n\u00b12mK<\/td>\n<\/tr>\n
Fixed point Tin<\/strong><\/td>\n231,928<\/td>\n\u00b12,5mK<\/td>\n<\/tr>\n
Fixed point Zinc<\/strong><\/td>\n419,527<\/td>\n\u00b13mK<\/td>\n<\/tr>\n
Fixed point Aluminum<\/strong><\/td>\n660,323<\/td>\n\u00b16mK<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Key Benefits<\/h3>\n

> High-quality platinum wire for exceptional stability
\n> Durable and contamination-free design for pre-aging and welding techniques
\n> Available in quartz and metal versions for various applications
\n> ITS-90 traceable calibration possible with UKAS certification
\n> Low self-heating: only 1mK per 25 microwatts
\n> Optimized for both primary and secondary laboratories<\/p>\n

Applications<\/h3>\n

The Isotech 909 Family is used worldwide for:<\/p>\n

> Calibration of industrial platinum resistance thermometers (PRTs)
\n> Research and development of temperature standards
\n> Interlaboratory comparisons and accreditation audits
\n> Use in metrology laboratories and production control<\/p>\n","protected":false},"excerpt":{"rendered":"

    \n
  • Three Stem Lengths<\/li>\n
  • Wide Operating Range<\/li>\n
  • Proven Design<\/li>\n
  • Nominal Sensitivity 0.1 \u03a9\/\u00b0C 0.4 \u03a9\/\u00b0C<\/li>\n<\/ul>\n","protected":false},"featured_media":33445,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"Isotech 909 Family Working SPRTs, are the workhorses of calibration laboratories around the world. During 2007, Isotech discussed their range of SPRTs","_seopress_robots_index":""},"product_brand":[],"product_cat":[263,270],"product_tag":[],"class_list":["post-1875","product","type-product","status-publish","has-post-thumbnail","product_cat-temperature-calibration","product_cat-temperatuur-sensoren","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product\/1875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/comments?post=1875"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/media\/33445"}],"wp:attachment":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/media?parent=1875"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_brand?post=1875"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_cat?post=1875"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_tag?post=1875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}