Reference Thermometer – 51000-0-LSI

This thermometer is an affordable end to arguments over temperature accuracy. We start with a high stability platinum RTD sensor rated at 1/10th the conformance limits of the DIN specification.

The general purpose probe is attached to a high precision resistance thermometer that provides 0.01° resolution. The combination is calibrated as a system to minimize all errors and the final deviations are given for five temperatures on the included calibration certificate.


  • Certified accuracy to ±0.05°F (±0.03°C) including probe


Range -328 to 400°F (-200 to 200°C)
Accuracy ±0.05°F (±0.03°C) -22 to 302°F (-30 to 150°C)
±0.18°F (±0.10°C) -58 to -22°F and 302 to 392°F (-50 to -30°C and 150° to 200°C)
Resolution 0.01° Auto-ranging to 0.1° above 199.9°
°F/°C User switchable (hold on/off button for 5 seconds when powering on)
Probe 4W RTD 1/10 DIN, fixed; 5" x .12" dia.
Cable Length 47 inches (1.2m)
Display 1 H x 1.5 W inches (24 H x 38 W mm) LCD
Cal Points 0, 32, 104, 158, and 212°F
(-18, 0, 40, 70 and 100°C)
Battery 3 x AAA, 2000 hours
Dimensions 5 H x 2.2 W x 1 D inches (128 H x 56 W x 25 D mm)
Weight 7.4 oz. (210 g)
Certificate Fully accredited UKAS lab, traceable to national standards, 5 points calibration certificate