This manual covers the operation, calibration, and specifications of the Extech 445815 Humidity Alarm II with dew point calculation.
The Extech 445815 Humidity Alarm II is a professional hygrometer designed to measure relative humidity, temperature, and dew point. It features programmable high and low limit alarms that trigger visual flashing lights and audible alerts when conditions exceed set thresholds. The device includes a remote probe suitable for wall mounting or placement on horizontal surfaces.
| Temperature Range | -10 to 60°C / 14 to 140°F |
|---|---|
| Humidity Range | 10% to 99% |
| Dew Point Range | -36 to 60°C / -32.8 to 140°F |
| Temperature Accuracy | +/- 1.0°C @ -10 to 50°C |
| Humidity Accuracy | +/- 4% RH @ 25 to 85% RH |
| Battery Type | (2) 1.5V 'AAA' cell |
| Weight | 6 oz (169g) |
The alarm activates if relative humidity exceeds the high limit or falls below the low limit.
Enter Max/Min mode, then press and hold the Reset button for 1 second to clear stored values.