Precision RTD Probe withstands temperatures down to -200°C.

Press Release Summary:

Able to be entirely enclosed in dry or wet environments with temperatures up to 156°C, Model 5623A Freezer Probe features sealed construction that prevents ingress of moisture when exposed to extremely low temperatures. NIST-traceable unit, available in 0.25 in. dia x 6 in. long Inconel(TM) sheath, is designed as calibration standard and has accuracy of ±0.05°C over full temperature range.

Original Press Release:

Hart Scientific Announces Its New Precision RTD "Freezer Probe"

The entire assembly may be enclosed in temperatures from -200 °C to 156 °C

AMERICAN FORK, UT - Hart Scientific, the world leader in temperature calibration products and services, announces its new precision RTD probe that can be placed within a dry or wet environment of -200 °C to 156 °C. The entire assembly of the Model 5623A Freezer Probe is specially sealed to prevent the introduction of moisture when exposed to extremely low temperatures. Designed as a calibration standard, this probe has an accuracy (which includes calibration uncertainty and short-term stability) of ±0.05 °C over its range of -200 °C to 156 °C. Each probe comes with a NIST-traceable certificate of calibration and specific ITS-90 coefficients.

The 5623A is available in a 0.25" (6.35 mm) diameter by 6" (125 mm) long Inconel(tm) sheath. The price of the 5623A is $595. Units ship 15 days ARO.

Hart Scientific, a Fluke company, designs, manufactures, and markets temperature measurement and calibration equipment. The Hart Scientific product line includes primary standards, thermometer readouts and probes, temperature baths, industrial calibrators and software. For more information contact Hart Scientific Inc. at 801-763-1600, visit their Web site at, or e-mail

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