Description
Siemens Building Technology 259 02034 Valve Assembly 320788 702 The non dispersive infrared (NDIR) CO2 The non dispersive infrared (NDIR) CO2 element utilizes a dual beam technology to provide an accuracy of ±30 ppm + 3% of reading while maintaining long term stability through a self calibration algorithm Rapid Shut Off Performance: The heavy duty closing spring ensures the valve returns to the "at rest" closed position in under one second upon de energization