The Model 815 is primarily designed for use as a precision check of the temperature of computer rooms, data storage rooms, aircraft cabins, cold rooms, controlled temperature stock rooms, clean rooms, laboratories, and large areas or volumes used in environmental testing.

The Model 815F operates across a range of 0°F to 150°F and the Model 815C across a range of -15°C to +65°C. The side of the instrument is perforated to allow as much air flow into the instrument as possible. Both models come complete with a reference pointer which can be preset to afford a visual check of an approaching critical temperature.

Model 815 Precision Wall Thermometer is the most accurate thermometer, featuring an accuracy of ±1°F (±1/2°C). These instruments are serialized, and upon request, they can be certified, traceable to the National Institute of Standards & Technology (N.I.S.T.). Price On Request. The instrument can be used in any position or fastened to a wall or other support that is not affected by extraneous temperatures.