This document describes the features and characteristics of the digital psychrometer and infrared thermometer models RH401 and RH405 produced by Extech Instruments Corporation.
This document is a product datasheet for the EXTECH RH401 Digital Psychrometer + InfraRed Thermometer. It highlights key features such as triple display options with backlighting, a built-in retractable sensor, and an adjustable emissivity range from 0.3 to 1.0.
| Humidity Range | 10 to 90%RH |
|---|---|
| Internal Temperature Range | -4 to 122°F (-20 to 50°C) |
| External Temperature Range | -328 to 2498°F (-200 to 1370°C) |
| Emissivity Range | 0.3 to 1.0 |
| Distance to Target Ratio | 8:1 |
The instrument measures humidity with a resolution of 0.1% RH and temperature with a resolution of 0.1°.
The internal temperature range is -4 to 122°F and the external range is -328 to 2498°F.
The device has an 8:1 distance to target ratio.