User's Guide Hygro-Thermometers Models 4465CF and 446580
This manual provides instructions for the Extech 4465CF and 446580 Hygro-Thermometers, which measure and display temperature and relative humidity. The 4465CF model features an analog output for connecting to chart recorders, while the 446580 includes a PC interface and built-in datalogging capabilities.
| Display | Multi-function 3 ½ digit (2000 count) LCD display |
|---|---|
| Humidity Range | 10% to 95% RH |
| Humidity Accuracy | 30 to 95% RH: ±3% RH |
| Temperature Range | 4 °F to 140 °F (20°C to 60 °C) |
| Temperature Accuracy | ±1.5 °F (±0.8°C) |
| Power Supply | 9V battery |
| Battery Life (4465CF) | 400 hours |
| Battery Life (446580) | 50 hours (approx.) |
| Weight (4465CF) | 7.0 oz. (198 g) |
| Weight (446580) | 7.1 oz. (200 g) |
The accuracy is ±3% RH for 30 to 95% RH and ±7% RH for 10 to 30% RH.
The 4465CF lasts approximately 400 hours, while the 446580 lasts approximately 50 hours.
The output is 10mVDC per °C/F or %RH, depending on the selected switch position.
The sampling rate can be set from 1 second to 65 seconds.