
Best selling Thermometers + Hygrometers from Extech
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1. Extech Temperature measuring device TM20 -40
This device is designed for measuring the temperature of air, liquids, adhesives, or semi-solid materials. The TM20 comes with a standard temperature probe, while the TM25 is equipped with a penetration probe for insertion into test materials. This device is delivered fully tested and calibrated, providing years of reliable service when handled properly.

2. Extech Instruments Hygro-Thermometer with remote probe, 10... 99%, -10... 60°C
The Extech Hygro-Thermometer is a precise measuring device that captures both temperature and relative humidity. With a large digit display and a retractable probe featuring a 45.7 cm long cable, it allows for easy handling and accurate measurements in various environments. The measurement range for relative humidity is from 10 to 99% with a tolerance of ± 4%, while temperature measurements range from -10 °C to +60 °C with a tolerance of ± 1 °C. Additional features include the storage of maximum and minimum values, as well as a calibration adjustment pin that enables precise tuning of the measurements. This hygrometer-thermometer is ideal for indoor use and provides a reliable solution for anyone needing accurate climate data.
- Retractable probe for flexible measurements
- Max/Min function for data storage
- Rear calibration adjustment pin for precise tuning
- Large digit display for easy readability.

Extech Instruments Hygro-Thermometer with remote probe, 10... 99%, -10... 60°C
3. Extech Air humidity meter (Hygromet
Damage caused by excessive humidity and improper ventilation in storage rooms, offices, and apartments not only leads to high costs but is also unhealthy and unsightly. The widespread belief that moisture comes from outside is generally incorrect. In fact, moisture in the home is generated by evaporation, particularly in the kitchen and bathroom. The use of highly insulating building materials significantly impairs air exchange, which can only be adequately ensured through active ventilation. Therefore, controlling the indoor climate is important for healthy living. The device measures the indoor climate and warns of mold growth and condensation through adjustable minimum and maximum alarm values.

4. Extech CO220 gas meter
Measures the carbon dioxide content (CO2), air temperature, and humidity with user-adjustable alarms, and calculates the condensation and evaporation point (wet bulb).

5. Extech CO210 Air Quality Meter
The CO210 not only allows for monitoring indoor air quality but also for recording and analyzing measurement data. Elevated levels can negatively impact health, concentration, and overall well-being. The CO2 level should be monitored in all rooms where many people stay for extended periods. The display shows the measurements of CO2, air temperature, and humidity, as well as the time and date simultaneously. For an easy assessment of the CO2 level, an index symbol is also displayed: Good (0 - 800 ppm), Normal (800 - 1200 ppm), Poor (>1200 ppm). If the adjustable alarm threshold is exceeded, an alarm signal will sound.

6. Extech Hygro-thermometer clock 445702
The device can be mounted on walls or placed on a tabletop using the integrated folding stand. Additional features include the display of Min/Max measurement values and a programmable alarm clock. This device allows for the simultaneous display of the time (12/24-hour format), temperature (C or F), and relative humidity (RH) in %.

7. Extech Instruments Hygro-Thermometer, 10... 99%, -10... 60°C
The Extech Hygro-Thermometer is a precise measuring device that captures both humidity and temperature indoors. With a measurement range of 10 to 99% relative humidity and -10 to 60 °C, it provides a comprehensive solution for monitoring indoor climate. The device features a digital LCD display that allows for clear and easy reading of current values. The accuracy of the measurements is ±5% for humidity and ±1 °C for temperature, making it a reliable instrument for various applications. Additionally, the hygrometer-thermometer has a maximum/minimum function with a reset option, enabling users to track the highest and lowest values. It is battery-operated and easy to mount, making it a practical choice for any room.
- Maximum and minimum values with reset function
- Battery-operated with one AAA battery
- Digital LCD display for easy readability
- Suitable for wall mounting.
