What are the characteristics of pneumatic control valve temperature controller and specification?

Pneumatic regulator temperature control in hvac applications, according to the change of temperature load, the controller can generate a delta (stem upward, downward) output signal, dynamic locking the set temperature. Features: built-in or remote thermal sensor (NTC thermal sensor). LCD digital display temperature, set temperature, the work mode. SET key, SET the work mode. + - key: increase, decrease. Key lock: value can be locked. Specification: supply voltage: 24 vac, 10 vac, 50 hz / 60 hz power itself: < 1 w: NTC thermistor sensor output signal: 24 v 1 a use of the environment: temperature (- 5 ℃ ~ 55 ℃, relative humidity (RH < 92 ℅) shell material: white ABS engineering plastics