The UNI-T UT333S split-type sensor has a flexible spring cable, making it ideal for measurements in hard-to-reach places such as air ducts, inside equipment or corners of industrial facilities. The UT333S is a useful tool both at home and in technical environments, where quick and accurate reading of environmental conditions is important.
The UT333S can measure temperatures from -10°C to 60°C (or 14°F to 140°F) with a resolution of 0.1°C and an accuracy of ±1°C. Humidity can be measured over the entire range, from 0% to 100% RH, with a resolution of 0.1% and an accuracy of ±5% from 20 to 80% RH. Thanks to the high-sensitivity sensor, the device provides reliable data within just one second of switching on, making it fast and efficient in daily use.
On the easy-to-read LCD display (32 × 35 mm), you can monitor the current measurement results and check the maximum and minimum values ​​(MAX/MIN function). The built-in "data hold" function allows you to keep the read value on the display, making it easier to work in tight or dark places. The UT333S also features a backlight, automatic device shutdown after inactivity, and an overload alarm that indicates when the measurement range has been exceeded.
The meter runs on three 1.5V (R03) batteries and weighs less than 310 grams. Thanks to the compact 110 × 53 × 26 mm housing, the device fits easily in your hand or pocket. Thanks to the separate sensor connected with a spring cable, you can comfortably take measurements in remote locations without having to carry the entire device.

- Model UT333S
- Temperature measurement range Temperature (°C): -10°C to 60°C (0.1°C resolution; ±1.0°C accuracy); Temperature (°F): (0.2°F resolution; ±2.0°F accuracy).
- Humidity measurement range between 0% RH and 100% RH (resolution 0.1% RH; accuracy ±5% between 20-80% RH)
- Unit conversion °C/°F Yes
- MAX/MIN Yes
- Data storage Yes
- Overload alarm Yes
- Display backlight Yes
- Automatic shutdown Yes
- Sampling time 1 s
- Power supply 3 × 1.5 V R03 AAA (batteries included)
- Display 32 mm × 35 mm
- Weight 310 g
- Dimensions 110 × 53 × 26 mm