4" Dial Precision Hygrometer 7434

4" Dial Precision Hygrometer. Easy to read 4" diameter dial shows Relative Humidity from 0 to 100% in 1% divisions. It has a ring for suspension and a recalibration screw is on the back. A beautiful silver, chrome, and glass style. An accurate Relative Humidity Indicator is necessary to assess and if necessary to influence the moisture content of the environment of persons, products, and materials. Our precision Hygrometer combines excellent accuracy and stability with reasonable cost. The Polytherm synthetic sensor developed especially for this application assures ±3% accuracy from 35 to 80% R.H. It may be regenerated and recalibrated for permanent accuracy. It may be used safely in temperatures of 32 to 200°F.