Fischer Humidity and Temperature – Dial w/ Black Face.
The Durable Fischer HTAB-169 Hygrometer is certified to be accurate within ±3% RH (30 … 95%), + 1 scale division.
The dial indicates the complete range of 0 to 100% relative humidity. Each instrument has been tested for accuracy at 3 points on the scale for high, medium and low readings. The calibration and certification are done under ISO-9001 control.
The bimetallic thermometer on the model HTAB-169 is accurate to ±1% of scale and has a range of -10° to 190°F.
Gradations are 1% RH and 2° Fahrenheit.
Gleaming finish, 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
Plastic lens available upon request
Accuracy ±3% RH + 1 scale division
Because these are mechanical instruments, they will not hold the ± 3% accuracy on the far ends of the scale (below 20% and above 95%). The measurement of the temperature and relative humidity remains correct if the pressure goes up or down. This is confirmed for the pressure range of 600 … 1200 hPa (mbar) = 8.7 … 17.4 PSI.
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