The Hygrometers of Models HTAB-169 and AB-167 are certified to be accurate within ±3% RH. The dial indicates the complete range of 0 to 100% relative humidity. Each 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 bimetallic thermometer on the model HTAB-169 is accurate to±1% of scale and has a range of -10° to 190°F. Graduations are 1% RH and 2° Fahrenheit. Because these are mechanical instruments, they will not hold the ± 3% accuracy on the far ends of the scale (below 20% and above 80%).
Abbeon AB-167 Certified Hygrometer, Dial w/ Black Face & Brass Case
- Solid brass case
- Gleaming finish
- 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
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