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A family of general use, simple to use, broadly featured electronic temperature and universal controllers for use in HVAC, agricultural, and industrial applications.


  • Use the T775-SENS-OAT to measure outside air temperature.
  • Some typical applications for the 50021579-001 and T775-SENSWT/WR sensors include monitoring return air, discharge air, and mixed air temperatures:
  • Sensors have fast response time and highly accurate
  • Sensors have 1/2 in. (6.35 mm) stainless steel probe with a thermally conductive epoxy
  • Sensors are 1,097 Ohms PTC at 77×F (25C)
  • The 50021579-001 is a standard temperature sensor for indoor applications
  • The T775-SENS-WR is a water resistant sensor with 5 ft leads
  • The T775-SENS-WT is a water tight sensor with 6 ft leads
  • The T775-SENS-OAT is for sensing outdoor air temperature and is housed in a weatherproof case for outdoor use (knockouts allow for 1/2 in. conduit connection)
  • Two year warranty

Product Specifications

For use in applications such as monitoring return air, discharge air, and mixed air temperatures
Dimensions (in.)
2 in. long x 1/4 in. dia probe with 6 ft. lead
Dimensions (mm)
51 mm long x 6 mm dia probe with 1829 mm lead
Used With
T775 Series 2000
Item Type
PT1000, 1097 ohms @ 77 F PTC
Operating Temperature Range (F)
-40 F to 270 F
Operating Temperature Range (C)
-40 C to 132 C
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