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The 3100U Series is a single-pole, single-throw switch activated by a snap-action bimetal disc. The case is laser welded to form a hermetically-sealed steel housing, with a glass-to-metal seal at the terminal junction. Temperature calibrations are pre-set at the factory. Each unit is thermally and mechanically inspected and tamperproof. They are available to open or close on temperature rise. A variety of mounting brackets and terminals is available. Used in high temperature control. 3100U 240 V: UL/CSA approved.

3100U Series Precision Thermostats – Honeywell


Precision and High Reliability Thermostats Datasheet -- 4MB
Thermostats Line Guide Product Line Guide English 444KB
Thermal Sensors Product Range Guide English 12MB

Browse 3100U Series Products

Product Functional Properties Open Temperature Close Temperature
3100U 00011458 Open on rise 28.9 °C [75 °F] 18.3 °C [65 °F]
3100U 00031431
3100U 00031431 Open on rise 4.4 °C [40 °F] -6.7 °C [20 °F]
3100U 00031432 Open on rise 10.0 °C [50 °F] -1.1 °C [30 °F]
3100U 00031433 Open on rise 15.6 °C [60 °F] 4.4 °C [40 °F]
3100U 00031434 Open on rise 21.1 °C [70 °F] 10.0 °C [50 °F]
3100U 00031435 Open on rise 26.7 °C [80 °F] 15.6 °C [60 °F]
3100U 00031436 Open on rise 32.2 °C [90 °F] 21.1 °C [70 °F]
3100U 00031437 Open on rise 37.8 °C [100 °F] 26.7 °C [80 °F]
3100U 00031438 Open on rise 43.3 °C [110 °F] 32.2 °C [90 °F]


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