Extech RH250W Hygro-Thermometer
The Extech RH250W Hygro-Thermometer gives fast and reliable humidity and temperature readings for building checks and maintenance work. It connects to the ExView mobile app through Bluetooth, allowing users to view and share data from a phone or tablet. This compact meter is suitable for inspections, HVAC checks and environmental monitoring.
Users can capture readings in real time and then create reports directly from the app. The large LCD screen displays humidity and temperature values at the same time, making readings simple to understand. In addition, the meter records maximum and minimum values for trend monitoring.
Wireless Monitoring and Data Sharing
Bluetooth connectivity makes the Extech RH250W Hygro-Thermometer easy to use in the field. The app can connect to up to eight compatible meters at the same time and supports alarm settings and data recording. Reports can also include images taken with a connected mobile device for improved documentation.
A transmission range of up to 90 metres in line of sight gives users flexibility when working across large areas. The meter samples every second and reacts quickly to changing conditions. As a result, it can help identify moisture issues and environmental changes before they become larger problems.
Designed for Everyday Site Use
The Extech RH250W Hygro-Thermometer is powered by three AAA batteries and includes an auto power off function to extend battery life. Its compact size and low weight make it easy to carry between jobs. A tripod mounting thread also allows hands-free operation when long-term monitoring is required.
Two different set types are available for the Extech RH250W Hygro-Thermometer, allowing users to choose the package that best suits their application. Whether used for building inspections, research work or HVAC servicing, the meter provides dependable measurements and simple wireless reporting. It is also backed by a two-year warranty for added peace of mind.
Key Features
- Measures relative humidity and ambient temperature at the same time
- Bluetooth communication with the ExView mobile application
- Displays live readings on a large dual LCD screen
- Records minimum and maximum measurement values
- Freeze function holds readings on the display
- Programmable high and low alarm settings
- Exports recorded data in CSV format
- Creates PDF reports directly from the mobile application
- Supports image attachment within generated reports
- Connects with up to eight compatible meters simultaneously
- Tripod mounting thread for fixed measurements
- Auto power off function helps extend battery life
- Suitable for HVAC inspections and building surveys
- Designed for research and environmental monitoring applications
- Two set configurations are available to suit different requirements
Technical Specifications
| Manufacturer | Extech |
| Manufacturer part code | RH250W |
| Product type | Bluetooth Hygro-Thermometer |
| Relative humidity range | 0 to 100% RH |
| Relative humidity accuracy | ±5% RH |
| Relative humidity resolution | 0.1% RH |
| Temperature measuring range | -10°C to 60°C (14°F to 140°F) |
| Temperature accuracy | ±1.0°C (±2.0°F) |
| Temperature resolution | 0.1°C (0.2°F) |
| Response time | 1 second |
| Sampling rate | 1 second |
| Wireless connectivity | Bluetooth via ExView iOS and Android app |
| Wireless transmission distance | Greater than 10 m and up to 90 m line of sight |
| App compatibility | iOS 13.0 and higher and Android 9.0 and higher |
| Power supply | 3 x AAA 1.5V batteries |
| Operating temperature | 0°C to 40°C (32°F to 104°F) |
| Operating humidity | Up to 80% RH |
| Dimensions | 150 x 53 x 28 mm |
| Weight | 80.5 g |
| Certifications | CE, FCC and UKCA |
| Warranty | 2 years |
Document Downloads
What’s Included
- Extech RH250W Hygro-Thermometer
- 3 x AAA batteries
- Access to the ExView mobile application
- User documentation