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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Beskrivning Pris 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-artikelnummer 497-8979
Tillv. art.nr701050/811-31
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RTD 1 Relay - 1 12 → 24 V dc - 93.5 x 22.5mm 0°C +55°C 61.6mm IP20 DIN Rail eTRON -
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Tillv. art.nr701060/811-31
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RTD 1 Relay - 1 12 → 24 V dc, 24 V ac - 76 x 36mm 0°C +55°C 56mm - Panel Mount eTRON -
RS-artikelnummer 877-1454
Tillv. art.nrIC+ 902 12V 8A + NTC
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NTC, PTC Relay 1 1 12 V - 74 x 32mm -50°C +110°C 59mm IP65 Panel Mount ICPlus Screw
RS-artikelnummer 124-1055
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NTC Relay 1 2 24 V ac/dc -60 → +150 °C 77 x 35mm 0°C +50°C 61mm IP20, IP65 Panel Mount - Screw
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NTC Relay 1 2 230 V ac -60 → +150 °C 77 x 35mm 0°C +50°C 61mm IP20, IP65 Panel Mount - Screw
RS-artikelnummer 500-1159
Tillv. art.nr701050/831-02
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Current 1 Relay - 1 230 V ac 0 → 100 °C 90 x 22.5 mmmm - - - - DIN Rail eTRON -
RS-artikelnummer 500-1143
Tillv. art.nr701050/821-31
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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-artikelnummer 736-5020
Tillv. art.nrD280-110-1000D-000
VarumärkeP.M.A
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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 -500 → 500 mV, -200 → +200 (Pt1000 Type Resistance Transducer) °C, -200 → +400 (T Type Thermocouple) °C, -200 → +850 (Pt100 Type Resistance Transducer) °C, -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, -25 → 1150 mV, -25 → 90 mV, -5 → 5 V, -2.5 → 115 mV, 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 48 x 96mm 0°C +60°C 118mm - - D280-1 -
RS-artikelnummer 497-8991
Tillv. art.nr701050/811-02
VarumärkeJumo
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RTD 1 Relay - 1 230 V ac - 93.5 x 22.5mm 0°C +55°C 61.6mm IP20 DIN Rail eTRON -
RS-artikelnummer 124-1058
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PT100 Relay 1 2 230 V ac -200 → +600 (PT100) °C, -99.9 → +300 (PT100) °C 77 x 35mm 0°C +50°C 73mm IP20, IP65 Panel Mount - Screw
RS-artikelnummer 762-2130
Tillv. art.nrID+961-12V+NTC
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NTC, PTC, RTD Digital 1 1 12 V -50 → +99 °C 74 x 32mm -5°C +55°C 60mm IP65 - IDPlus -
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J Type Thermocouple, K Type Thermocouple, R Type Thermocouple, S Type Thermocouple, T Type Thermocouple Relay 1 1 24 V ac 0 → +1300 (K Type Thermocouple) °C, 0 → +1700 (R Type Thermocouple) °C, 0 → +1700 (S Type Thermocouple) °C, 0 → +400 (T Type Thermocouple) °C, 0 → +600 (J Type Thermocouple) °C 77 x 35mm 0°C +50°C 73mm IP20, IP65 Panel Mount - Screw
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Tillv. art.nrIC+ 915 12V 8A TCJ/K PT100
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RTD, Thermocouple Digital, Relay 1 2 12 V - 74 x 32mm -5°C +55°C 59mm IP65 Panel Mount ICPlus Screw
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Tillv. art.nrTC4810-01-110/240VAC
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K Type Thermocouple - - - 110 → 240 V ac 0 → +200 °C 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
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Tillv. art.nrTC4810-05-110/230VAC
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K Type Thermocouple Relay - 1 110 → 230 V ac - 48 x 48mm -10°C +50°C 89mm IP40 1/16 DIN - -
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Thermocouple - - - 90 → 240 V ac -40 → +1600 °C 70 x 85mm -5°C +55°C 61mm - - DR 4000 -
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NTC, PT100, PTC - - 4 24 V ac, 30 V dc Carel DN33 110 x 70mm -10°C +60°C 60mm - - DN33 -
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Tillv. art.nrIR33S0ER00
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