The Extech EA25 EasyView Digital Hygro-Thermometer Datalogger measures and records humidity, temperature, dew point, and wet bulb data in real-time.
The Extech EA25 is a digital hygro-thermometer dologger designed to measure and record humidity, temperature, dew point, and wet bulb data in real-time. The device features a multifunction LCD with bargraph indicators and supports both manual and automatic data logging modes.
This guide details the instrument's operation, including how to take measurements, select units (C/F), and use maximum/minimum recording functions. It also provides instructions for configuring the internal clock, setting datalogging parameters such as start time, stop time, and sampling intervals, and transferring stored data via RS-232 interface.
| Humidity Range | 10.0 to 95.0% RH |
|---|---|
| Temperature Range | -4 to 140°F (-20 to 60°C) |
| Humidity Accuracy | +3% RH (at 25°C, 30 to 95% RH) |
| Temperature Accuracy | +1.8°F (41°C) |
| Datalogger Storage | 99 sets in manual mode, 15,000 in auto mode |
| Sampling Intervals | 3 to 255 seconds |
| Power Supply | 6 x 1.5V 'AAA' batteries |
The approximate battery life is 200 hours.
Up to 15,000 sets of data can be recorded.
The device operates between 32 to 140°F (0 to 60°C) with less than 95% RH non-condensing.
The software is compatible with Windows 95/98, ME, 2000, and XP.