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. 198-851
Mfr. Part No.LR09604-106
MYR778.89
Each
units
K Type Thermocouple Relay 1 1 90 → 260 V ac - 96 x 96mm -10°C +50°C 53mm IP50 Panel Mount STATOP -
RS Stock No. 913-9974
Mfr. Part No.PB00H0HB00
BrandCarel
MYR911.62
Each
units
Digital 5 Relay 1 5 230 V ac - 167 x 36mm -10°C +65°C - IP65 Panel Mount PB00 Screw
RS Stock No. 346-378
Mfr. Part No.FPRT100-110/240VAC
BrandTempatron
MYR494.94
Each
units
RTD - - - 110 → 240 V ac -50 → +100 °C 48 x 48mm -10°C +50°C 112mm - - - -
RS Stock No. 809-0957
Mfr. Part No.PJS5C0HF00
BrandCarel
MYR549.83
Each
units
NTC - - - 115 V ac - 59 x 67mm -10°C +50°C 156mm - - Easy XL -
RS Stock No. 613-7675
Mfr. Part No.701531/888-23
BrandJumo
MYR1,127.33
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. 809-1048
Mfr. Part No.FTST200K-110/240VAC
BrandTempatron
MYR505.33
Each
units
K Type Thermocouple - - - 230 V ac - 48 x 48mm -10°C +50°C 112mm - - - -
RS Stock No. 348-1783
Mfr. Part No.40T96-4-00-RR00-000 (EX 40T96-4-00-RR000
BrandGefran
MYR1,532.80
Each
units
- Relay - 2 11 → 27 V ac/dc - 108 x 48mm - - 105mm IP65 - 40T96 -
RS Stock No. 736-5020
Mfr. Part No.D280-110-1000D-000
BrandP.M.A
MYR1,656.48
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. 841-7989
Mfr. Part No.6.533.012.300
BrandKubler
MYR676.73
Each
units
Current, Voltage - - - 10 → 30 V dc - 48 x 24mm -20°C +65°C 59mm - - CODIX 533 -
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. 745-7939
Mfr. Part No.PJEZSNP000
BrandCarel
MYR473.99
Each
units
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
RS Stock No. 344-619
Mfr. Part No.TC4810-52-110/240VAC
BrandTempatron
MYR586.64
Each
units
PT100 - - - 110 → 240 V ac 0 → +100 °C 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
RS Stock No. 500-1092
Mfr. Part No.701060/822-31
BrandJumo
MYR928.57
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. 497-8985
Mfr. Part No.701050/811-05
BrandJumo
MYR549.27
Each
units
RTD 1 Relay - 1 115 V ac - 93.5 x 22.5mm 0°C +55°C 61.6mm IP20 DIN Rail eTRON -
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. 613-7782
Mfr. Part No.701540/821-02
BrandJumo
MYR502.99
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. 745-7936
Mfr. Part No.PJEZMNN0E0
BrandCarel
MYR329.88
Each
units
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 34mm - - PJ Easy -
RS Stock No. 913-9977
Mfr. Part No.PB00Y0EV30
BrandCarel
MYR623.73
Each
units
- 3 Relay 1 3 230 V ac - - - - - - Panel Mount - Screw
RS Stock No. 736-5014
Mfr. Part No.D280-112-0000D-000
BrandP.M.A
MYR1,566.60
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 -
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