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 Priced to Clear Series
RS Stock No. 497-8991
Mfr. Part No.701050/811-02
BrandJumo
£97.94
Each
Units
RTD 1 Relay - 1 230 V ac - 93.5 x 22.5mm 0°C +55°C 61.6mm IP20 DIN Rail - eTRON
RS Stock No. 497-8963
Mfr. Part No.701060/811-02
BrandJumo
£113.74
Each
Units
RTD 1 Relay - 1 230 V ac - 76 x 36mm 0°C +55°C 56mm - Panel Mount - eTRON
RS Stock No. 497-9001
Mfr. Part No.701060/811-31
BrandJumo
£113.17
Each
Units
RTD 1 Relay - 1 12 → 24 V dc, 24 V ac - 76 x 36mm 0°C +55°C 56mm - Panel Mount - eTRON
RS Stock No. 668-3033
Mfr. Part No.701531/888-25
BrandJumo
£242.73
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. 500-1036
Mfr. Part No.701050/821-02
BrandJumo
£97.94
Each
Units
Thermocouple 1 Relay - 1 230 V ac 0 → 500 °C 90 x 22.5mm 0°C +500°C - - DIN Rail - eTRON
RS Stock No. 497-8979
Mfr. Part No.701050/811-31
BrandJumo
£97.94
Each
Units
RTD 1 Relay - 1 12 → 24 V dc - 93.5 x 22.5mm 0°C +55°C 61.6mm IP20 DIN Rail - eTRON
RS Stock No. 668-3036
Mfr. Part No.701530/888-22
BrandJumo
£179.90
Each
Units
Current, RTD, Thermocouple, Voltage 1 Logic, 1 Relay - 2 20 53 V ac/dc -200 +850 °C 48 x 24mm 0°C +55°C 100mm - Panel Mount - di 32
RS Stock No. 613-7675
Mfr. Part No.701531/888-23
BrandJumo
£181.31
Each
Units
Current, RTD, Thermocouple, Voltage 1 Logic, 2 Relay - 3 110 240 V ac -200 +850 °C 96 x 48mm 0°C +55°C 100mm - Panel Mount - di 08
RS Stock No. 500-1137
Mfr. Part No.701050/831-31
BrandJumo
£97.94
Each
Units
Voltage 1 Relay - 1 24 V ac, 230 V ac -50 → +180 °C 90 x 22.5mm 0°C +55°C - - DIN Rail - eTRON
RS Stock No. 613-7798
Mfr. Part No.701540/831-02
BrandJumo
£114.67
Each
Units
Current 1 Relay - 1 230 V ac - 76 x 36 mmmm 0°C +55°C - IP20, IP65 Panel Mount - di eco
RS Stock No. 613-7782
Mfr. Part No.701540/821-02
BrandJumo
£83.39
Each
Units
Thermocouple 1 Relay - 1 230 V ac - 76 x 36 mmmm 0°C +55°C - IP20, IP65 Panel Mount - di eco
RS Stock No. 500-1143
Mfr. Part No.701050/821-31
BrandJumo
£97.94
Each
Units
Thermocouple 1 Relay - 1 12-24 V dc, 24 V ac 0 → 500 °C 90 x 22.5mm 0°C +500°C - - DIN Rail - eTRON
RS Stock No. 500-1115
Mfr. Part No.701060/822-02
BrandJumo
£113.17
Each
Units
J L K Thermocouple 2 Relay - 2 230 V ac - - 0°C +55°C - - Panel Mount - eTRON
RS Stock No. 467-181
Mfr. Part No.701061/800-32/000
BrandJumo
£127.58
Each
Units
RTD 3 Relay - 4 12 24 V ac/dc - 76 x 36 mmmm 0°C +55°C - - Panel Mount - eTRON M100
RS Stock No. 500-1092
Mfr. Part No.701060/822-31
BrandJumo
£113.17
Each
Units
J L K Thermocouple 2 Relay - 2 24 V ac, 12 → 24 V dc - - 0°C +55°C - - Panel Mount - eTRON
RS Stock No. 500-1109
Mfr. Part No.701060/832-02
BrandJumo
£113.17
Each
Units
Current 2 Relay - 2 230 V ac - - 0°C +55°C - - Panel Mount - eTRON
RS Stock No. 497-9017
Mfr. Part No.701060/811-05
BrandJumo
£113.17
Each
Units
RTD 1 Relay - 1 115 V ac - - 0°C +55°C - - Panel Mount - eTRON
RS Stock No. 467-147
Mfr. Part No.701061/820-32/236
BrandJumo
£170.82
Each
Units
RTD 4 Relay - 4 12 24 V ac/dc - 76 x 36 mmmm 0°C +55°C - - Panel Mount - eTRON M100
RS Stock No. 500-1159
Mfr. Part No.701050/831-02
BrandJumo
£97.94
Each
Units
Current 1 Relay - 1 230 V ac 0 → 100 °C 90 x 22.5 mmmm - - - - DIN Rail - eTRON
RS Stock No. 613-7805
Mfr. Part No.701060/821-02
BrandJumo
£249.08
Each
Units
Thermocouple 1 Relay - 1 230 V ac - - 0°C +55°C - - Panel Mount - eTRON