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. 809-1032
Mfr. Part No.TC4830-03-110/230VAC
BrandTempatron
MYR468.14
Each
units
K Type Thermocouple - - - 110 → 230 V ac - 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
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. 791-5980
Mfr. Part No.6.564.010.000
BrandKubler
MYR1,036.48
Each
units
RTD, Thermocouple - - - 90 → 260 V ac - 96 x 48mm -20°C +65°C 90.5mm - - CODIX 564 -
RS Stock No. 809-0953
Mfr. Part No.PJS5C0HE00
BrandCarel
MYR563.46
Each
units
NTC - - - 230 V ac - 59 x 67mm -10°C +50°C 156mm - - Easy XL -
RS Stock No. 809-1041
Mfr. Part No.FTST1200K-110/240VAC
BrandTempatron
MYR505.33
Each
units
K Type Thermocouple - - - 230 V ac - 48 x 48mm -10°C +50°C 112mm - - - -
RS Stock No. 809-0988
Mfr. Part No.IREVF0EN00
BrandCarel
MYR596.28
Each
units
NTC - - - 230 V ac - 76.2 x 34.7mm - - 79.5mm - - IR33+ -
RS Stock No. 809-1035
Mfr. Part No.TC4830-53-110/230VAC
BrandTempatron
MYR439.26
Each
units
PT100 - - - 110 → 230 V ac - 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
RS Stock No. 535-0754
Mfr. Part No.E5C2-R20K AC100-240 0-800
BrandOmron
MYR560.74
Each
units
K Type Thermocouple - - - 100 → 240 V ac 0 → 800 °C 48 x 48mm -10°C +55°C 86.7mm - - E5C2 -
RS Stock No. 746-3114
Mfr. Part No.E5C2-R20J AC100-240 0-300
BrandOmron
MYR557.46
Each
units
J Type Thermocouple - - - 100 → 240 V ac 0 → +300 °C 48 x 48mm - - 86.7mm - - E5C2 -
RS Stock No. 344-580
Mfr. Part No.TC4830-04-110/230VAC
BrandTempatron
MYR526.53
Each
units
K Type Thermocouple Relay - 1 110 → 230 V ac - 48 x 48mm - - 91mm IP40 1/16 DIN - -
RS Stock No. 390-7932
Mfr. Part No.40T96-4-00-RR00-001 (EX 40T96-4-00-RR001
BrandGefran
MYR1,532.80
Each
units
- Relay - - 100 240 V ac - 108 x 48mm - - 105mm IP65 - 40T96 -
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. 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. 198-794
Mfr. Part No.LR09604-108
MYR778.89
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. 791-5984
Mfr. Part No.6.564.010.300
BrandKubler
MYR1,095.73
Each
units
RTD, Thermocouple - - - 10 → 30 V dc - 96 x 48mm -20°C +65°C 90.5mm - - CODIX 564 -
RS Stock No. 745-7933
Mfr. Part No.PJEZS0P000
BrandCarel
MYR446.57
Each
units
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
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. 535-0748
Mfr. Part No.E5C2-R20K AC100-240 0-1200
BrandOmron
MYR623.05
Each
units
- - - - - - - - - - - - - -
RS Stock No. 511-7456
Mfr. Part No.IR33Y0LR00
BrandCarel
MYR566.11
Each
units
NTC - - - 12 → 24 V ac -50 → +90 °C 76.2 x 34.2mm -10°C +50°C 94mm - - IR33 -
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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