The Fischer (Lufft) HTAB-169 Hygrometer. The dial indicates the complete range of 0 to 100% relative humidity. The instrument has been tested at three different positions of the dial at temperatures ranging from 32° to 230°F. The calibration and certification are done under ISO-9001 control.

The humidity is sensed by a durotherm element that is a synthetic hygroscopic fiber that expands and contracts in response to the moisture in the air.

The temperature is indicated by the actuation of a bimetallic spring which transmits changes by expansion and contraction.

Model: Fischer HTAB-169 Certified Hygro-Thermometer

NIST Certification available

• Housing is solid brass, polished and lacquered.
• Overall diameter 6", Dial 5"
• Case drilled for wall mounting
• Black dial with white numbers and letters
• Manufactured and tested under ISO-9001
• Accuracy ±3% RH + 1 graduation
• Accuracy Thermometer: ±1% of scale and has a range of -10° to 190°F
• Graduation: 1% RH and 2° Fahrenheit

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