The STS Reference Sensors are Pt100 reference probes used as the reference instrument to verify true temperature in any type of hand-held, liquid bath, or dry-block calibrator. Use directly in custody transfer application where high accuracy means money. The superior specifications combined with a long history of reliability and low drift have made the STS probes the working standard in many national laboratories worldwide. STS sensors are economical, and offer fast response times, low immersion depths, compact physical sizes, and specified low drift rates; even at high temperatures. Combine with or temperature instruments for complete high accuracy systems. For sanitary sensor calibration, JOFRA has also designed a special cable type reference sensor, the STS-102 A. Due to the small size and flexible connection, the design permits positioning of the sensor throughout the depth of the well in a dry-block, eg. under a sanitary flange. The reference sensor must be placed at the same level and in parallel with the sensor-under-test as indicated in the illustration above. The illustration shows calibration of a sanitary sensor. The sensor is in contact with the insert.