Key facts
- Brand
- EXTECH
- Model
- RH401
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Extech RH401/RH405 Digital Psychrometer + IR Thermometer User's Guide
This manual provides instructions for the Extech RH401 Digital Psychrometer + InfraRed Thermometer, which measures humidity, air temperature, dew point, wet bulb, and surface temperature via infrared. Key features include a retractable probe, programmable auto power off, backlight, and an RS-232 interface for PC data acquisition.
Read onlineEXTECH RH401 specifications
| Humidity Range | 0.0 to 100.0% RH |
|---|---|
| Humidity Accuracy | ±3% RH (10 to 90%) |
| Air Temperature Range | -4.0 to 122.0°F (-20 to 50°C) |
| Air Temperature Accuracy | ±1.8°F (±1°C) |
| IR Emissivity Range | 0.3 to 0.99 |
| IR Spot/Distance Ratio | 8:1 |
| Battery Life (Laser Inactive) | approx. 150 hours |
| Dimensions | 6.8x2.7x1.9" (175x70x50mm) |
Source: Extech RH401/RH405 Digital Psychrometer + IR Thermometer User's Guide
All EXTECH RH401 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What does the E1 error message indicate?
It indicates an IR temperature failure or temperature failure, requiring repair or replacement.
From: Extech RH401/RH405 Digital Psychrometer + IR Thermometer User's Guide
How long does the two-point calibration take?
The RH calibration procedure takes approximately one hour to complete.
From: Extech RH401/RH405 Digital Psychrometer + IR Thermometer User's Guide
What is the maximum resolution for humidity and temperature measurements?
The instrument measures humidity with a resolution of 0.1% RH and temperature with a resolution of 0.1°.
From: EXTECH RH401 Digital Psychrometer + InfraRed Thermometer Product Datasheet
What is the temperature range for internal and external measurements?
The internal temperature range is -4 to 122°F and the external range is -328 to 2498°F.
From: EXTECH RH401 Digital Psychrometer + InfraRed Thermometer Product Datasheet