Extech 45158 Mini Thermo-Anemometer
The Extech 45158 Mini Thermo-Anemometer gives fast and accurate air flow readings in a compact pocket design. It measures wind speed and temperature at the same time and also calculates wind chill when conditions become colder. Its small size and light weight make it ideal for field engineers, HVAC work and outdoor inspections.
Built for demanding environments, the meter has a water resistant housing that can handle light rain and damp conditions. A fold-out protective housing extends to 229 mm, allowing readings in difficult locations such as vents and grilles. The supplied lanyard also makes it easy to carry between jobs.
Designed for Practical Measurements
The Extech 45158 Mini Thermo-Anemometer supports multiple air speed units including m/s, km/h, mph, knots, ft/min and Beaufort force. Averaging intervals of 5, 10 or 13 seconds help provide stable readings in changing air conditions. A clear dual-line LCD displays important information at a glance.
Additional functions make everyday use simpler. Data Hold freezes a reading on the screen while Auto Power Off helps extend battery life during long working days. Relative humidity and dew point measurements also increase the meter’s flexibility.
Reliable for Indoor and Outdoor Use
Because it combines several environmental measurements in one device, the Extech 45158 Mini Thermo-Anemometer is suitable for maintenance teams, engineers and environmental monitoring tasks. The tripod mounting thread allows hands-free operation when repeat testing is required. Its compact body also slips easily into a tool bag or pocket.
Two different set types are available, allowing users to choose the package that best suits their requirements. The Extech 45158 Mini Thermo-Anemometer is supplied ready for use with a battery and lanyard, so it can be used straight from the box.
Key Features
- Simultaneous air velocity and temperature measurements
- Wind chill calculation below 10°C
- Dual-line LCD screen for clear readings
- Compact pocket-sized design for portability
- Water resistant housing for outdoor use
- Fold-up protective housing for added durability
- Extended handle reaches up to 229 mm
- Measures relative humidity and dew point
- Data Hold function freezes displayed values
- Auto Power Off conserves battery life
- Supplied with wrist lanyard for easy carrying
- Suitable for HVAC, maintenance and field testing
- Tripod compatible for repeat measurements
- Available in two different set configurations
Technical Specifications
| Manufacturer Part Code | 45158 |
| Air velocity range | 1.1 to 20 m/s |
| Air velocity range | 4.0 to 72.0 km/h |
| Air velocity range | 216 to 3936 ft/min |
| Air velocity range | 2.5 to 44.7 mph |
| Air velocity range | 2.1 to 38.9 knots |
| Air velocity resolution | 0.1 m/s, 0.7 km/h, 20 ft/min, 0.2 mph, 0.3 knots |
| Air velocity accuracy | ±3% of reading plus 0.2 m/s |
| Air velocity accuracy | ±3% of reading plus 1.4 km/h |
| Air velocity accuracy | ±3% of reading plus 40 ft/min |
| Air velocity accuracy | ±3% of reading plus 0.4 mph |
| Air velocity accuracy | ±3% of reading plus 0.6 knots |
| Beaufort scale range | 1 to 8 BF |
| Beaufort accuracy | ±1 BF |
| Temperature range | -18 to 50°C (0 to 122°F) |
| Temperature accuracy | ±1°C (±1.8°F) |
| Temperature resolution | 0.1°C/°F |
| Dew point range | 0 to 50°C (32 to 122°F) |
| Dew point accuracy | ±2°C (±3.6°F) |
| Dew point resolution | 0.1°C/°F |
| Relative humidity range | 10% to 95% RH |
| Relative humidity accuracy | ±5% RH |
| Relative humidity resolution | 1% |
| Averaging intervals | 5, 10 and 13 seconds |
| Display | Dual-line LCD |
| Mounting | ¼-20 tripod thread |
| Housing length extended | 229 mm (9 in) |
| Lanyard length | 109.2 cm (43 in) |
| Power supply | CR2032 lithium battery included |
| Functions | Data Hold and Auto Power Off |
| Weight | 110 g |
| Water resistance | Suitable for use in light rain |
| Warranty | Not specified |
Document Downloads
What’s Included
- Extech 45158 Mini Thermo-Anemometer
- CR2032 lithium battery
- 109.2 cm (43 in) lanyard