Hart Scientific 1594A and 1595A Super-Thermometers

The 1594A/1595A Super-Thermometers from Hart Scientific are designed to combine accuracy, value and innovative features for calibration of SPRTs, PRTs and thermistors.

The thermometers are accurate enough for the primary lab, providing accuracy as good as 0.06 ppm (0.000015 °C) and economical enough for the secondary lab.

The thermometers feature ‘ratio self-calibration’ that enables users to test the accuracy or calibrate the resistance ratio linearity of the thermometer’s measurement circuit without requiring any external devices or special training. Metrologists can verify accuracy and performance automatically in about 30 min, with the push of a button.

Users can also calibrate the thermometer’s internal reference resistors using the resistance calibration function and an external standard resistor. The thermometer assists with the calibration through an easy-to-use set-up utility. Once the calibration is complete, the thermometer reports the results to the display and provides the option to write the results to a USB memory device.

The thermometers offer speeds as fast as 1 s per measurement (full accuracy with a 2 s sample rate), allowing users to complete tests in less time, track temperature changes more accurately, and evaluate thermal response in sensors. When measuring fixed-point temperatures that require the highest levels of accuracy and lowest levels of noise, users have complete control to change the measurement speed to meet their requirements.