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C7150 Solid State mixed air sensor is used with Honeywell economizer logic modules and W973 and M7415 to proportion outdoor and return air dampers in economizer systems.


  • Uses thermistor sensing element in ventilation duct systems.
  • Negative temperature coefficient (NTC) causes resistance to decrease as sampled air temperature increases.
  • Resistance change used as in input to control W973 and M7415.
  • Requires no settings or calibration.
  • Mounts on duct surface with four screws (not supplied).

Product Specifications

Temperature Mixed Air Sensor for Duct mixed or discharge air
Dimensions (in.)
2 in. high, 2 1/2 in. wide, 3/4 in. deep
Dimensions (mm)
51 mm high x 64 mm wide x 19 mm deep
Used With
W973 and M7415; W7210, W7212, W7213, W7214, W7215, W7459, W7460
Item Type
Mount on a mounting bracket (not included) inside the mixed air or discharge air duct.
Approvals, Underwriters Laboratories Inc.
Component Recognized
Electrical Connections
1/4 in. (6 mm) quick-connect terminals.
3000 ohms @ 25C NTC
Operating Temperature Range (F)
40 F to 110 F
Operating Temperature Range (C)
4 C to 43 C
Approvals, CE
Report: GV97-011
Ambient Temperature Range (F)
250 F Maximum
Ambient Temperature Range (C)
121 C Maximum
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