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The UNI-T UT309A is a professional non-contact infrared thermometer with a −35°C to 450°C measuring range and 10:1 distance-to-spot ratio. Its IP65 housing, 3 m drop resistance and 250 ms response time make it suitable for demanding inspection and maintenance work.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT309A |
| Product Type | Professional Infrared Thermometer |
| Temperature Range | −35°C to 450°C / −31°F to 842°F |
| Accuracy at ≥0°C | ±1.8°C or ±1.8%, whichever is greater |
| Accuracy Below 0°C | ±(1.8°C + 0.1°C per °C) |
| Resolution | 0.1°C / 0.1°F |
| Distance-to-Spot Ratio | 10:1 |
| Response Time | 250 ms |
| Emissivity | 0.95, fixed |
| Laser | Single laser, Class 2 |
| Laser Power | <1 mW |
| Laser Wavelength | 630–670 nm |
| Spectral Response | 8–14 μm |
| Measurement Modes | MAX, MIN, AVG and DIF |
| Display Hold Time | 8 seconds |
| Protection Rating | IP65 |
| Drop Resistance | 3 m |
| Power Supply | 1 × 9V battery (6F22) |
| Product Size | 189 × 118 × 55 mm |
| Net Weight | 292 g |
| Certifications | CE, UKCA |
Suitable for electrical distribution inspections, HVAC maintenance, machinery servicing, transportation equipment inspections and general industrial surface-temperature measurement.
This instrument measures surface temperature only. Do not aim the laser at people or animals, and avoid direct eye exposure. Measurement accuracy can be affected by reflective surfaces, steam, dust or other obstructions between the instrument and the target.
