Siemens QFM2100 Duct Relative Humidity/Temperature Sensor

Siemens QFM2100 Duct Relative Humidity/Temperature Sensor,
The QFM Series Duct Relative Humidity and Relative
Humidity/Temperature Sensors monitor and transmit
changes in humidity and temperature to the building
control systems. Several models are available for humidity
only or for humidity and temperature sensing. The humidity
only units are available in either 4 to 20 mA or 0 to 10 Volt
signal versions. Combination humidity and temperature
units are also available in either dual current or voltage
versions, transmitting proportional signals back to the
controller. Nickel 1000 Ohm (Siemens type) temperature
outputs on combination versions are also offered.x