Thermostats and Controllers

T631F/G, TW155/255 Series

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T631F/G, TW155/255 Series

NEMA 4X Rated Thermostats T631F/G, TW155/255 Series

NEMA 4X Rated Thermostats


The Honeywell T631F/G Series and the TW155/255 Series thermostats have NEMA 4X enclosure ratings and provide line voltage control of heating, cooling and ventilation systems in areas that are subject to washdown such as barns, poultry and hog houses, pump buildings and crop storage areas.


(Wholesale customers, log in for your special pricing)

QtyModelDescriptionIn StockList PriceInternet Price
T631A1022 FARM-O-STAT 70-140 SPDTIn Stock588.00329.28
T631F1068 SPDT NEMA 4 TSTAT, INT. SETPOINT, 24 TO 240 VACIn Stock1,086.00608.16
T631F1084 SPDT NEMA 4 TSTAT, EXT. SETPOINT 24 TO 240 VACINFO1,113.00623.28
T631F1092 SPDT NEMA 4 TSTAT, EXT. SETPT, 120 TO 240 VACINFO1,068.00598.08
T631G1059 SPDT(2) NEMA 4 TSTAT, EXT. STPT, 120 TO 240 VACINFO1,282.00717.92
T651A3018 LINE VOLT/H OR C SPDTINFO392.00219.52
TW155 SPDT NEMA 4 TSTAT, EXT. SETPOINT, 120 TO 277 VACINFO597.00334.32
TW255 DPDT NEMA 4 TSTAT, EXT. SETPOINT, 120 TO 277 VACIn Stock797.00446.32


No accessories found
  • NEMA 4X housing for environmental protection from water, oil, dust and corrosion
  • External mounted sensing element for fast reaction time
  • External setpoint models or tamper-proof internal setpoint models

Maximum Operating Temperature:

 :TW155/255 110°F (43°C)

 :T631F/G 145°F (63°C)

Dimensions in (cm):


 :TW155/255 6.87"H x 3.125"W x 3.375"D (Not including knob)

 :(17.4 x 7.9 x 8.6 cm)

 :T631F/G 5"H x 6.5"W x 3"D

 :(12.7 x 16.5 x 7.6 cm)


 :TW155/255 ETL Canada/USA

 :T631F/G UL File #E4436 Vol. 1 Sec. UL Guide XAPX; CSA Certified File No. LR1620 Guide No. 400-E-O; meets NEC Article 547-4

Warranty:1 year