PCE Instruments WM1 Multifunction Temperature and Humidity Meter

Model # WM1

PCE-WM1 is a multi-function environmental meter used to determine relative humidity (% RH), absolute humidity (g/m³), air temperature, dew-point temperature and surface temperature (°C). This Metric-only measuring instrument comes complete with an external sensor probe for taking the surface temperature of different materials.
This device is used extensively in the construction industry to evaluate building materials and working conditions. It is also used in the food industry to ensure product quality and freshness.
In addition, heating, ventilation and air conditioning (HVAC) technicians trust this meter to perform HVAC system performance audits.

PCE-WM1 is a multi-function environmental meter used to determine relative humidity (% RH), absolute humidity (g/m³), air temperature, dew-point temperature and surface temperature (°C). This Metric-only measuring instrument comes complete with an external sensor probe for taking the surface temperature of different materials.
This device is used extensively in the construction industry to evaluate building materials and working conditions. It is also used in the food industry to ensure product quality and freshness. In addition, heating, ventilation and air conditioning (HVAC) technicians trust this meter to perform HVAC system performance audits.
The humidity detector is calibrated by the manufacturer. An optional ISO calibration certificate issued by an accredited calibration laboratory can be ordered.
Measures relative humidity, air temperature and surface temperature
Calculates absolute humidity and dew-point temperature
Includes external sensor probe for taking surface temperature
Displays measurements in Metric units only
Features minimum, maximum, peak hold and non-linearity correction functions

Measuring ranges	Temperature: -20 … 80°C Relative humidity: 10 … 95% RH Absolute humidity: 0.5 … 74.4 g/m³
Measuring units	Metric only
Resolution	0.1
Accuracy	Temperature: ±0.5°C Relative humidity: ±3% Absolute humidity: ±2%
Response time	Approx. 10 seconds
Functions	Minimum, maximum, peak hold, non-linearity correction
Sensor cable length	1.1 m / 3.6 cm
Power supply	1 x 9V battery
Auto power off	Yes, after 4 minutes of inactivity
Display	LCD
Dimensions	Approx. 165 x 80 x 33 mm / 6.5 x 3.2 x 1.3 in
Weight	Approx. 380 g / < 1 lb