UNI-T UT300S Infrared Thermometers
- Temperature Range: -32°C to 400°C
- 12:1 Distance-to-Spot Optical Ratio
- Adjustable Emissivity: 0.10 to 1.00
- Quick Response: 500 Milliseconds
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Description
Compact Design Meets High-Tech Measurement Demands Worldwide
The UNI-T UT300S Infrared Thermometer represents the perfect blend of portability, reliability, and advanced measurement technology. As a proud member of the UNI-T UT300 Series, the UT300S is engineered for convenience, fitting comfortably into your hand and your toolkit without adding unnecessary bulk. Its red and grey housing offers both visual appeal and ergonomic comfort, making it ideal for frequent, on-the-go use. The UT300S is designed for individuals and professionals who need accurate temperature readings at a moment’s notice—whether during equipment maintenance, food safety checks, laboratory work, or even home improvement tasks. This instrument ensures that you can conduct spot-performance checks or comprehensive temperature diagnostics anywhere, anytime, with quick deployment and minimal fuss.
Single-Button Simplicity for Fast, Stress-Free Operation
Simplicity defines the UT300S experience. With just a single-button interface, users can operate the thermometer instantly—there are no complicated menus or learning curves. The extra-large, bright backlit display provides clear, easy-to-read measurements, even in dark environments such as basements or engine compartments. Data hold capability ensures that values remain visible when you need to record or review them. Backlight illumination, low battery indication, and automatic power-off after eight seconds add layers of convenience and battery efficiency. By removing complexity, the UT300S allows field technicians, engineers, chefs, safety officers, and homeowners alike to focus completely on the task at hand, delivering reliable results with every use—regardless of their experience level.
Reliable, Fast Readings for Diverse Environments
UNI-T’s expertise in sensor design shines in the UT300S. Boasting an impressive temperature measurement range from -32℃ up to 400℃ (-25.6°F to 752°F), the UT300S covers most temperature monitoring requirements found in daily industrial, commercial, and residential settings. The device’s high accuracy (±2.0°C or ±2%), quick response time (just 500ms), and outstanding repeatability (±0.5°C/±0.5%) mean that users can trust every reading—eliminating guesswork and increasing efficiency. The adjustable emissivity range (from 0.10 to 1.00) adds to its flexibility, allowing users to adapt measurement settings for various surfaces and materials, whether shiny metals, painted objects, or organic materials. The inclusion of a robust Class 2 laser pointer ensures precise targeting, making the thermometer invaluable across a multitude of operational contexts.
Extended Measurement Distance with Advanced Optical Ratio
One of the key advantages of the UT300S lies in its 12:1 distance-to-spot (D:S) optical ratio, which allows users to stand farther away from the target surface and still obtain accurate readings. This feature is of particular benefit when checking the temperature of hot, moving, or otherwise dangerous objects, such as motors, circuit breakers, heating systems, or machinery in operation. The enhanced distance capability not only improves safety by minimizing the risk of burns and electrical shocks but also makes it possible to monitor objects that are physically difficult to access, such as air vents, overhead ductwork, remote piping, or even food in commercial ovens. The improved optics make the UT300S a true professional’s tool, ready to tackle measurement challenges wherever they appear.
Dedicated Applications in Maintenance, Industry, and Home
The UNI-T UT300S Infrared Thermometer finds dedicated applications across many fields. In electrical and mechanical maintenance, it helps identify overheating components before they fail, enabling preemptive repairs and reducing costly downtime. HVAC professionals use the UT300S for rapid duct and vent assessments, checking radiator and compressor temperatures, and verifying thermal efficiency of insulation. In kitchens and food processing, it’s perfect for ensuring safe temperatures during storage, cooking, or serving, minimizing health risks. Automotive technicians employ the UT300S to inspect engine blocks, exhausts, and brakes, diagnosing faults without physical contact. Laboratory staff utilize it to quickly and safely check the thermal characteristics of samples, containers, or instruments. At home, DIY enthusiasts employ the thermometer for tasks like detecting thermal leaks at windows, testing water heater outputs, or monitoring the temperature of household appliances for troubleshooting. Its versatility makes it equally valuable to professionals, scientists, and everyday users.
Robust Construction with Everyday Practical Features
The UT300S not only excels in functionality but in resilience. It is built to withstand the rigors of daily field use, having passed a one-meter drop test. Its strong housing protects sensitive internal components from impacts, while its operational temperature range of 0°C–50°C ensures it works reliably across diverse geographies and climates. The large 22mm x 22mm display is easy on the eyes, and the lightweight 185g construction prevents user fatigue during longer inspection rounds. Powered by a common 9V battery (6F22), the device balances long operational life with simple power replacement. Automatic power-off functionality further preserves battery health when the tool is idle. Together, these details equip the UT300S for a lifetime of demanding use, wherever precision thermal measurement is necessary.
tpt24: World’s Favorite UNI-T Product Supplier
When investing in reliable test equipment, it makes sense to buy from a reputable source. tpt24 stands out as the best online shop in the world for the UNI-T UT300S and other professional measurement tools. Through tpt24, you are assured of absolute authenticity—every UT300S thermometer sold is a genuine manufacturer’s unit, not a third-party imitation. tpt24 guarantees global reach: no matter which country you call home, your UT300S will arrive promptly, securely packaged and covered by a full international warranty. Their excellence in both customer support and logistics means you shop with confidence, benefit from expert advice, and always receive original, high-quality equipment. For anyone who wants peace of mind, an extensive product lineup, exclusive deals, and total after-sales service, tpt24 is the go-to leader for UNI-T devices worldwide.
Specifications
| Specifications | UT300A+ | UT300S |
| Temperature range | -20℃~400℃ | -32°C~400°C |
| -4℉~752℉ | -25.6°F~752°F | |
| Accuracy | >0℃: ±2.0℃ or ±2%; ≤0℃: ±(2.0℃+0.1℃/℃) | ±2°C or ±2% |
| >32℉: ±4.0℉ or ±2%; ≤32℉: ±(4.0℉+0.1℉/℉) | ||
| Repeatability | 1℃ or 1.0% (2℉ or 1.0%) | ±0.5°C or ±0.5% |
| D:S ratio | 10:1 | 12:1 |
| Response time | ≤500ms (95% of reading) | 500ms |
| Emissivity | 0.95 | 0.10~1.00 Adjustable |
| Spectral response | 5.5um~14um | 8μm~14μm |
| Laser power | < 1mW | <1mW |
| Features | ||
| Auto power off | 8s | 8s |
| Low battery indication | √ | √ |
| Data hold | √ | √ |
| ℃/℉ selection | √ | √ |
| Backlight | √ | √ |
| Laser | √ | √ |
| Operating temperature | 0℃~50℃ (32℉~122℉) | |
| Storage temperature | -20℃~60℃ (-4℉~140℉) | |
| Operating humidity | <90% RH (non-condensing) | |
| Drop test | 1m | |
| General Characteristics | ||
| Power | 1.5V battery (LR03) x 2 | 9V Battery (6F22) |
| Display | 20mm x 24mm | 22mm X 22mm |
| Product color | Red and grey | |
| Product net weight | 146g | 185g |
| Product size | 135mm x 94mm x 36.5mm | 153mm X 108mm X40mm |
| Standard individual packing | Blister, English manual | |
| Standard quantity per carton | 20pcs | 48pcs |
| Standard carton measurement | 430mm x 265mm x 300mm | 590×530×360mm (0.11 CBM Per Standard Carton) |
| Standard carton gross weight | 6.97kg | 14.8kg |












