On / Off Temperature Controllers

On-off temperature controllers (also called signallers), are simple temperature control devices. An optimal temperature is preset and when it's exceeded the output switches off. When the temperature falls below the optimal preset, the output switches on. The output value has only an 'on' or 'off' option, with no middle state.

What are on-off temperature controllers used for?

On-off temperature controllers are used for monitoring purposes in heating environments. They prevent rapid increases in temperature that may cause damage to contactors and valves by cutting off the power. These controllers are often used where there isn't a need for precision temperature control. They are beneficial in applications where the system can't handle continuous interruptions. On-off controllers are found in temperature alarms and thermostats.

Types of on-off temperature controllers

A typical example of an on-off temperature controller is the thermostat in a heating system. If the temperature drops below the preset level, the heating system will switch on, and vice versa. Another example is that of a limit controller. It protects a system against overheating or overcooling by shutting down the power if the temperature exceeds a preset level.


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Description Price Input Type Output Type Number of Inputs Number of Outputs Supply Voltage Range Size Minimum Operating Temperature Maximum Operating Temperature Panel Depth IP Rating Mounting Type Series Termination Type
RS Stock No. 481-7824
Mfr. Part No.PA201.004AX01
BrandBaumer
MYR534.91
Each
units
- - - - 100 → 300 V dc, 85 → 265 V ac - - - - - - - PA201 -
RS Stock No. 746-3170
Mfr. Part No.E5LC6
BrandOmron
MYR1,839.19
Each
units
- - - - - - - - - - - - E5L -
RS Stock No. 339-0132
Mfr. Part No.DTC410-02-MH
BrandTempatron
MYR810.34
Each
units
RTD - - - 90 → 260 V ac -99 → +400 °C 48 x 48mm -10°C +50°C 84.5mm - - - -
RS Stock No. 442-0694
Mfr. Part No.6.531.012.300
BrandKubler
MYR650.21
Each
units
Ni100, PT100 - - - 10 → 30 V dc - 48 x 24 (1/32 DIN)mm -20°C +65°C 59mm IP65 - CODIX 531 -
RS Stock No. 798-4104
Mfr. Part No.40T-72-4-01-RR-00-9
BrandGefran
MYR1,378.08
Each
units
Thermocouple Relay - 2 11 → 27 V dc, 18 → 27 V ac - 72 x 36mm 0°C +50°C 54mm IP65 - 40T72 -
RS Stock No. 339-0075
Mfr. Part No.DTC410-01-ML
BrandTempatron
MYR810.34
Each
units
Thermocouple - - - 10 → 32 V ac/dc -99 → +999 °C 48 x 48mm -10°C +50°C 84.5mm - - - -
RS Stock No. 913-9983
Mfr. Part No.PJEZC0M000
BrandCarel
MYR689.72
Each
units
Digital 3 Relay 1 3 230 V ac - 81 x 36mm - - - IP65 Panel Mount - Screw
RS Stock No. 390-7904
Mfr. Part No.40T-48-4-00-RR-0-0-0-1
BrandGefran
MYR1,484.36
Each
units
Thermocouple PT100 Relay - 2 100 V ac, 240 V ac - 48 x 48mm - - 99mm IP65 - 40T48 -
RS Stock No. 877-1479
Mfr. Part No.IC+ 915 230V 8A TCJ/K PT100
BrandEliwell
MYR661.16
Each
units
RTD, Thermocouple Digital, Relay 1 2 230 V - 74 x 32mm -5°C +55°C 59mm IP65 Panel Mount ICPlus Screw
RS Stock No. 668-3033
Mfr. Part No.701531/888-25
BrandJumo
MYR1,444.24
Each
units
Current, RTD, Thermocouple, Voltage 1 Logic, 2 Relay - 3 20 → 30 V ac/dc -200 → +850 °C 48 x 96mm 0°C +55°C 100mm - Panel Mount di 08 -
RS Stock No. 809-0991
Mfr. Part No.DN33Z9MR20
BrandCarel
MYR1,022.09
Each
units
NTC, PT100, PTC - - 4 24 V ac, 30 V dc Carel DN33 110 x 70mm -10°C +60°C 60mm - - DN33 -
RS Stock No. 198-328
Mfr. Part No.LR09604-110
MYR785.70
Each
units
PT100 Relay 1 1 90 → 260 V ac - 96 x 96mm -10°C +50°C 53mm IP50 Panel Mount STATOP -
RS Stock No. 809-0985
Mfr. Part No.PJEZY0H000
BrandCarel
MYR428.07
Each
units
NTC - - - 230 V ac - 81 x 36mm -10°C +50°C 58mm - - PJ Easy -
RS Stock No. 809-1039
Mfr. Part No.TC4830-54-110/230VAC
BrandTempatron
MYR565.06
Each
units
PT100 - - - 110 → 230 V ac - 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
RS Stock No. 736-5017
Mfr. Part No.D280-112-1000D-000
BrandP.M.A
MYR2,035.09
Each
units
B Type Thermocouple, C Type Thermocouple, Current, D Type Thermocouple, E Type Thermocouple, J Type Thermocouple, K Type Thermocouple, L Type Thermocouple, N Type Thermocouple, PT1000 Type Resistance Transducer, R Type Thermocouple, S Type Thermocouple, T Type Thermocouple, Voltage - - - 90 250 V ac 0 +1760 (R Type Thermocouple) °C, 0 +1760 (S Type Thermocouple) °C, 0 +1820 (B Type Thermocouple) °C, 0 +2315 (C Type Thermocouple) °C, 0 +2315 (D Type Thermocouple) °C, 0 10 V, 0 20 mA, -100 +1000 (E Type Thermocouple) °C, -100 +1200 (J Type Thermocouple) °C, -100 +1300 (N Type Thermocouple) °C, -100 +1350 (K Type Thermocouple) °C, -100 +900 (L Type Thermocouple) °C, -2.5 115 mV, -200 +200 (Pt1000 Type Resistance Transducer) °C, -200 +400 (T Type Thermocouple) °C, -200 +850 (Pt100 Type Resistance Transducer) °C, -25 1150 mV, -25 90 mV, -5 5 V, -500 500 mV 48 x 96mm 0°C +60°C 118mm - - D280-1 -
RS Stock No. 344-120
Mfr. Part No.TC4830-02-110/230VAC
BrandTempatron
MYR625.46
Each
units
K Type Thermocouple Relay - 1 110 → 230 V ac - 48 x 48mm - - 91mm IP40 1/16 DIN - -
RS Stock No. 344-546
Mfr. Part No.TC4810-01-110/240VAC
BrandTempatron
MYR531.08
Each
units
K Type Thermocouple - - - 110 → 240 V ac 0 → +200 °C 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
RS Stock No. 198-839
Mfr. Part No.LR09604-100
MYR761.66
Each
units
Thermocouple Relay 1 1 90 → 260 V ac - 96 x 96mm -10°C +50°C 53mm IP50 Panel Mount STATOP -
RS Stock No. 809-0997
Mfr. Part No.PJEZS0G000
BrandCarel
MYR602.56
Each
units
NTC - - - 230 V ac - 81 x 36mm -10°C +50°C 58mm - - PJ Easy -
RS Stock No. 344-552
Mfr. Part No.TC4810-02-110/240VAC
BrandTempatron
MYR507.65
Each
units
K Type Thermocouple - - - 110 → 240 V ac 0 → +400 °C 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
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