Extech 45170 4-in-1 Environmental Meter
The Extech 45170 4-in-1 Environmental Meter combines air velocity, light, relative humidity and temperature measurement in one compact instrument. Its dual LCD can show temperature with air velocity or relative humidity at the same time. Built-in sensors and a vane wheel allow users to carry out several environmental checks without changing instruments.
A thermistor measures ambient air temperature, while the humidity sensor uses thin-film capacitance for a fast response. The light function uses a precision photodiode with a colour correction filter, and cosine correction supports angled light measurements. For wider temperature work, the built-in Type K input accepts an optional thermocouple probe and measures up to 2372°F or 1300°C.
The Extech 45170 4-in-1 Environmental Meter also supports day-to-day inspection work with data hold and minimum or maximum recording. Its display characters reverse direction to suit the selected operating mode, which helps maintain clear viewing. A low-battery indicator, overrange indication and selectable automatic power-off function support practical use in the field.
Key Benefits
- Combines four environmental measurement functions in one pocket-sized instrument.
- Displays paired readings on the dual LCD for quicker assessment.
- Uses built-in humidity, light, air temperature and vane sensors.
- Records minimum and maximum values for easier result checking.
- Freezes the displayed value with the data hold function.
- Changes character orientation to improve viewing in different modes.
- Provides low-battery and overrange indications for clearer operation.
- Supports high-temperature measurements through the Type K input.
- Allows automatic power-off to be disabled when continuous use is required.
Common Applications
Extech 45170 4-in-1 Environmental Meter is suitable for a range of testing, maintenance and inspection tasks, including:
- Measuring air velocity in ft/min, m/s, km/h, mph or knots.
- Checking ambient air temperature with the built-in thermistor.
- Monitoring relative humidity in indoor environments.
- Measuring illumination levels in lux or foot-candles.
- Recording minimum and maximum environmental readings.
- Holding readings for later viewing or manual recording.
- Checking higher temperatures with an optional Type K probe.
- Carrying out combined temperature and airflow checks.
Why Choose This Model?
This model suits users who need air velocity, light, humidity and temperature measurement in one compact meter. No alternative product models were supplied for direct comparison, but the verified four-function design, dual display and Type K input distinguish its measurement scope.
