Mini Temperature and Humidity Meter Unit UT333 — portable thermo-hygrometer for temperature and relative humidity measurement

UNI-T UT333 temperature and humidity meter

UNI-T UT333 is a digital temperature and humidity meter, designed for precise measurement of ambient conditions. The device will be suitable for both home and professional use - such as in warehouses, offices, greenhouses, server rooms, laboratories, etc. The UT333 measures temperature from -10°C to 60°C and humidity from 0% to 100% RH, with an accuracy of ±1°C and ±5% RH, respectively, making it accurate for most everyday applications. The unit's compact design, low weight (102 g) and backlit display make it handy and convenient to use, even in dimly lit areas.

Measurement range tailored to everyday needs

The meter can measure temperature from -10°C to 60°C (or 14°F to 140°F) with a resolution of 0.1°C/0.2°F and an accuracy of ±1.0°C/±2.0°F. Humidity measurement covers the full range from 0% to 100% RH, with a resolution of 0.1% RH and an accuracy of ±5% RH. These are sufficiently precise parameters to effectively control climatic conditions in rooms or equipment surroundings.

Practical functions to support daily operations

The UT333 offers useful functions: MAX/MIN modes allow you to keep track of extreme measurement values, Data hold keeps the current result on the screen, and the °C/°F switch makes it easy to customize the unit. A built-in overload (OL) alarm protects against erroneous measurements, and a backlit LCD screen allows operation even in low light conditions.

Compact design and economical power supply

The meter is powered by 3 AAA (R03) batteries, and its low weight - just 102 grams - and compact dimensions (155 × 50 × 28 mm) make the device comfortable to hold and fit easily into a bag, drawer or pocket. An automatic shut-off function after 5 minutes of inactivity helps save power, and a low battery indicator (3.0-3.5V) lets you know when it's time to replace it with a new one.

How to use

Switch the meter on and allow the sensor to stabilize for a short period in the measurement location. Hold the device at breathing height or at the specific point of interest and wait for the displayed values to settle. For repeated spot checks, move the meter between locations and allow a short stabilization time after each relocation. Turn the device off when finished to preserve battery life.

Recommendations

For accurate readings, avoid placing the meter in direct sunlight, close to heating vents, or immediately adjacent to heat-generating equipment. Allow the sensor to acclimate to the measurement environment for several minutes before recording values. Store the meter in a dry, moderate-temperature environment when not in use and replace batteries according to the manufacturer's guidance.