WM261 Wall Mount Digital Relative Humidity & Temperature Transmitter

The WM261 has been developed for high precision measurement of relative humidity and temperature. This transmitter is available with a range of outputs.








Product Features

  • Designed for accurate measurement in a controlled environment
  • Temperature output scaling configurable on request
  • Linearization for a specific isotherm on request
WM261

Technical Specification

Performance
Measurement Range (RH) 0-100% RH
Measurement Range (T) -20 to +80°C
Accuracy at 23°C
Humidity
<±2% RH (5–95% RH)
Accuracy at 23°C
Temperature
Pt100 1/3DIN direct ±0.2°C
Current output ±0.3°C
Stability - RH Sensor <±1% RH/year
Response Time <10 sec typical (for 90% of the step change)
Electrical output/input
Output Signal (RH)
Configurable on Request
4–20 mA
0–1, 0–5, 0–10 V
Output Signal (T)
Configurable on Request
4–20mA
3-wire 1/3 DIN Pt100 direct
0–1, 0–5, 0–10 V
Supply Voltage
Output 4–20 mA:  V + = 12–30 V DC
Output 0–10 V:  V + = 15–30 V DC
Output 0–5 V:  V + = 10–30 V DC
Output 0–1 V:  V + = 8–30 V DC
Load Resistance
Output 4–20 mA:  Rload< (Uv-9)/0.02
Output 0–10 V:  R > 10 kΩ
Output 0–5 V:  R > 5 kΩ
Output 0–1 V:  R > 1 kΩ
Current Consumption 2 x 20 mA max
Operating Conditions
Operating Temperature
   Probe
   Housing
   Storage

-30 to +85°C
-30 to +70°C
-40 to +70°C
Mechanical specification
Ingress Protection IP65 (NEMA 4 level)
Housing Material PPO + POM
Dimensions
   Housing
   Probe

80 x 80 x 34mm
L=85mm, ø12mm
Electrical Connections Screw terminals
Weight 100g