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The UNI-T UT309C is a professional non-contact infrared thermometer with a −35°C to 650°C measuring range and 12:1 distance-to-spot ratio. Dual-laser targeting, adjustable emissivity and a rugged IP65 housing make it suitable for demanding industrial inspection and maintenance work.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT309C |
| Product Type | Professional Infrared Thermometer |
| Temperature Range | −35°C to 650°C / −31°F to 1202°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 | 12:1 |
| Response Time | 250 ms |
| Emissivity | 0.1–1.0, adjustable |
| Laser | Dual laser, Class 2 |
| Laser Power | <1 mW |
| Laser Wavelength | 630–670 nm |
| Spectral Response | 8–14 μm |
| Measurement Modes | MAX, MIN, AVG and DIF |
| Temperature Alarm | High alarm with red LED; low alarm with blue LED |
| Display Hold Time | 8 seconds |
| Additional Functions | Measurement lock, data hold, backlight, low-battery indication and automatic power-off |
| Tripod Mount | Yes |
| 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 servicing, industrial equipment maintenance, transport equipment inspections and non-contact measurement of high-temperature surfaces.
