Standard platinum resistance thermometer AccuMac AM1850

Standard platinum resistance thermometers (SPRT) is common used to interpolate temperature in the range from -189.3442 °C to +660.323 °C on the International Temperature Scale of 1990 (ITS-90).  They are widely used as standard or reference thermometer to calibrate other thermometers and to measure temperature precisely in primary and secondary laboratories. AM1850 SPRT are the crown jewels of AccuMac temperature probes. It takes decades of our scientific expertise and original breitling copy watches craftsmanship to create these world class products. They feature a very low drift rate. 

To improve the durability of the SPRT, Inconel 600 replaces quartz glass as sheath material of the thermometer. A special capsule is adopted to protect the platinum sensor wire from contamination introduced by metal sheath at high temperature. All parts used in the thermometer are completely cleaned and treated at high temperature before assembly. The gas mixture filled in the thermometer is well controlled to reduce oxidation effect as low as possible. Every SPRT is fully tested for stability after manufactured. This world class probe meets ITS-90 criteria of standard thermometer fully with a very competitive pricing.

AM1860 has a temperature range from -200 °C to +500 °C.