
Best selling Hygrometers from Extech
On this page you’ll find a ranking of the best Hygrometers from Extech. To give you a quick overview, we’ve added the most important product details. This page always stays fresh and updates automatically.
1. Extech Hygrometer radio transmitter
The Extech RH200W-T is a wireless temperature and humidity transmitter for the RH200W. You can connect up to 8 wireless transmitters to measure temperature and humidity values up to a distance of 30 meters. It is ideal for monitoring restaurants, production facilities, offices, apartments, greenhouses, and storage or archive buildings.

2. Extech Air humidity meter (Hygromet
The HD-500 psychrometer combines a thermometer and hygrometer in one device. Temperature measurement is carried out using a K-type temperature probe for contact measurements. Additionally, the built-in IR thermometer allows for non-contact surface temperature measurement. The HD-500 features a large, backlit triple LC display and a USB interface.

3. Extech Humidity/temperature stopwatch
The HW30 multifunction stopwatch displays a digital count-up/count-down timer, temperature, humidity, and heat index. The measurement of the heat index indicates how hot it feels when humidity is combined with the actual temperature. It is ideal for use in hot weather. Additional features include a 12/24-hour clock, a stopwatch, a 30-lap/split memory, and a programmable alarm. The HW30 Humidity/Temperature HeatWatch comes with a carrying strap, battery, and user manual.

4. Extech Material moisture indicator MO257
The MO257 enables quick and non-destructive moisture measurement in walls, ceilings, and floors. The device is suitable for all types of building materials. With the adjustable min/max function, fast and effective measurements can be taken on wall or floor surfaces without needing to look at the display.

5. Extech Instruments data logger, 1 channel, USB, 16000 measurements
The Extech RHT20 is a highly advanced data logger specifically designed for the precise measurement of humidity and temperature. With a storage capacity of up to 16,000 measurements, this device provides a comprehensive solution for monitoring environmental conditions in various applications, such as storage containers, trucks, or temperature-controlled rooms. The logger is equipped with a built-in sensor that can capture temperature values ranging from -40 °C to 70 °C and a relative humidity of 0% to 100%. The user-friendly USB interface allows for easy configuration and data downloading, while the LCD display shows current measurements as well as Min/Max values and alarm status. Thanks to the programmable alarm thresholds, users can ensure they are notified of critical changes in environmental conditions.
- Storage capacity of 16,000 measurements for comprehensive data storage
- Built-in sensor for precise temperature and humidity measurements
- User-programmable alarm thresholds for optimal monitoring
- LCD display shows current values as well as Min/Max and alarm status.

6. Extech 445580 Luftfeuchtemessgerät (Hygrometer) 10 % rF 90 % rF
This practical humidity and temperature meter is suitable for on-the-go use with its durable 3V lithium battery that offers a long usage time. The slim Extech 445580 humidity/temperature pen measures humidity levels between 10 and 90% rH and records temperatures from -10 °C to 50 °C (14 °F to 122 °F). This tool is ideal for field measurements and stores the recorded maximum and minimum values until the memory is cleared. It also features a button for holding rapidly fluctuating measurement data.

Extech 445580 Luftfeuchtemessgerät (Hygrometer) 10 % rF 90 % rF
7. Extech Humidity meter (hygrometer) Humidity and temperature meter
It features a live or user-defined recording time and programmable Min/Max alarm set points. A built-in stand for desktop use as well as a wall mount bracket are included. The RH550 also has a field-replaceable probe that can be attached to the monitor or connected via a 1.8 m long cable. This recorder is useful in office buildings, conference rooms, laboratories, hospitals, clean rooms, greenhouses, food storage, and more.

8. Extech Material Moisture Meter MO50
This moisture meter works with probes that indicate the moisture content in wood and building materials such as wall panels, drywall, cardboard, plaster, concrete, and mortar. Features include an acoustic alarm – the tone repetition rate increases with higher moisture levels – as well as symbols indicating low, medium, and high moisture contents. It has a compact size, a data hold function that freezes the last reading on the display, a built-in battery status check, and a measurement verification test. The automatic shut-off saves battery power.

9. Extech Hygro-Thermometer
The RH250W is a compact hygro-thermometer with Bluetooth connectivity, allowing building and maintenance professionals to view and share data on relative humidity and temperature directly from a mobile device using the free ExView app. With the ability to capture data, display trends, set visual and acoustic alarms, and send reports, users can gain deeper insights into the condition of facilities and buildings.

10. Extech Humidity meter (hygrometer) MO290-
The Extech MO290 humidity meter (hygrometer) is a versatile and compact device designed for precise measurements of indoor climate and material moisture. It features a digital display and allows for the recording of moisture values ranging from 0% to 99% relative humidity. The hygrometer is ideal for use in various environments, whether in living spaces, offices, or industrial applications. With a robust design and user-friendly operation, the MO290 is suitable for both professionals and individuals who value accurate measurements. The device comes with a convenient carrying case and a penetration sensor, making handling and transport easier. The measurement accuracy of ± 2.5% ensures that the results are reliable and enable informed decision-making.
- Digital display for easy readability
- Dew point and mold warning display to prevent moisture damage
- Battery-operated for flexible usage options
- Robust design for use in various environments.
