Humidity and Temperature – Dial w/ Color graph & BrassCase
Shows Relative Humidity and Temperature
in both Fahrenheit and Centigrade at a glance
In Germany, Lufft has been making fine meteorologicalinstruments for over 100 years. Abbeon has been offering their high qualityinstruments here in the U.S. for over forty years.
The Lufft instruments shown here have white faceplates with black lettering.(Red lettering is added for Celsius scales when they are included). The humidityis sensed by a Durotherm element that is a synthetic hygroscopic fiber thatexpands and contracts in response to the moisture in the air. The thermometersare actuated by bimetallic springs which transmit changes in temperature throughexpansion and contraction. Accuracy for these instruments are 3% for therelative humidity and 2¿F for the temperature.
The Abbeon Certified Hygrometer Model HTAB-176 is certified to be accuratewithin 3% RH. The dial indicates the complete range of 0 to 100% relativehumidity. Each instrument has been tested at three different positions of thedial at temperatures ranging from 32¿ to 230¿F. The calibration andcertification are done under ISO-9001 control. The bi-metallic thermometer onthe model HTAB-176 is accurate to 1% of scale with a range of -20 to 100¿Centigrade and 0 to 210¿ Fahrenheit. Graduations are 1¿ for Centigrade, 2¿Fahrenheit and 1% RH.
This is the only humidity indicator that we know of that has a 1-year guaranteeand a 5-year warranty. Some of our humidity indicators working on the sameprinciple as this instrument have been in use for over 10 years and are givingsatisfactory service day after day, month after month, and year after year. Boththe humidity and temperature are directly read without any calculationswhatsoever.
Solid 6-inch overall brass case drilled for wall mounting.Shipping weight: 3 pounds. Color differentiated 5-inch dial with black lettersand numbers and a red pointer.