









The UNI-T UT381PV Solar Irradiance Meter is a professional photovoltaic (PV) testing instrument designed for measuringsolar irradiance, panel temperature, ambient temperature, inclination angle, and azimuth direction.It is ideal for solar panel installation, commissioning, maintenance, inspection, and laboratory testing.
The meter features Bluetooth connectivity, a dedicated Mobile APP, built-incompass and tilt sensors, IP65 protection, and can store up to12,800 measurement records. It also supports integration with theUNI-T UT541 15kW Photovoltaic I-V Curve Analyzer.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT381PV |
| Certification | CE |
| Origin | Mainland China |
| Battery Included | No |
| Solar Irradiance Range | 0 ~ 1400 W/m² |
| Solar Irradiance Resolution | 1 W/m² |
| Solar Irradiance Accuracy | ±(5.0% rdg + 5 digits) |
| BTU Measurement | 0 ~ 500 Btu/(ft²·h) |
| Temperature Range | -40°C ~ 120°C (-40°F ~ 248°F) |
| Temperature Resolution | 0.1°C / 0.2°F |
| Temperature Accuracy | ±1°C (-10°C~75°C) ±2°C (Other ranges) ±2°F (14°F~167°F) ±4°F (Other ranges) |
| Inclination Measurement | -90.0° ~ +90.0° |
| Inclination Resolution | 0.1° |
| Inclination Accuracy | ±1.5° (-50°~+50°) ±2.5° (-85°~-50°, +50°~+85°) ±3.5° (Other ranges) |
| Azimuth Measurement | 0° ~ 360° |
| Azimuth Accuracy | ±7° |
| Internal Memory | 12,800 Sets |
| Storage Interval | 1 Second ~ 60 Minutes |
| Bluetooth | Wireless Transmission up to 100m |
| Mobile APP | Supported |
| LED Indicator | Yes |
| Sound Prompt | Yes |
| Compass Calibration | Supported |
| Auto Power Off | 30 Minutes |
| Working Altitude | ≤2000 meters |
| Working Environment | -20°C ~ 60°C, ≤90%RH (Non-condensing) |
| Storage Environment | -30°C ~ 70°C, ≤80%RH (Non-condensing) |
| IP Rating | IP65 |
| Drop Protection | 2 Meters |
| Battery | 2 × AA Batteries (Not Included) |









