Maxitrol Inlet Air Temperature Reset Sensor (5:1 Ratio) w/ Mixing Tube

These air temperature sensors maintain precise, stable gas-fired temperatures. Selectra's unique electronic Modulator or Modulator-Regulator valves control gas flow with instantaneous response and continual adjustment. They are the superior alternative to mod motors and butterfly valves. FEATURES: Accessory for Series 14, 21 & 31 Ratio set 5:1