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. 841-7958
Mfr. Part No.6.564.010.309
BrandKubler
TWD10,501.00
Each
units
MV, PT100, Resistance, Thermocouple - - - 10 30 V dc - 96 x 48mm -20°C +65°C 90.5mm - - CODIX 564 -
RS Stock No. 809-1013
Mfr. Part No.TC4810-03-110/230VAC
BrandTempatron
TWD4,320.00
Each
units
K Type Thermocouple - - - 110 → 230 V ac - 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
New
RS Stock No. 198-1170
BrandRS PRO
TWD2,962.00
Each
units
Thermocouple Analogue Relay 1 2 230 V - 72mm x 72mm - - - - - - -
RS Stock No. 420-035
Mfr. Part No.DR4020 TCJ-K-R-S-T
BrandEliwell
TWD13,920.00
Each
units
Thermocouple - - - 90 240 V ac -40 +1600 °C 70 x 85mm -5°C +55°C 61mm - - DR 4000 -
RS Stock No. 344-574
Mfr. Part No.TC4830-01-110/230VAC
BrandTempatron
TWD4,161.00
Each
units
K Type Thermocouple Relay - 1 110 → 230 V ac - 48 x 48mm - - 91mm IP40 1/16 DIN - -
RS Stock No. 497-9017
Mfr. Part No.701060/811-05
BrandJumo
TWD4,958.00
Each
units
RTD 1 Relay - 1 115 V ac - - 0°C +55°C - - Panel Mount eTRON -
RS Stock No. 509-0878
Mfr. Part No.DR 983 PTC
BrandEliwell
TWD8,419.00
Each
units
PTC - - - 230 V ac - 70 x 85mm -5°C +55°C 61mm - - DR 983 -
RS Stock No. 745-7933
Mfr. Part No.PJEZS0P000
BrandCarel
TWD3,111.00
Each
units
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
RS Stock No. 875-1226
BrandRS PRO
TWD6,867.00
Each
units
Linear, RTD, Thermocouple Relay 1 2 24 V ac/dc - 72 x 72mm 0°C +50°C 87.5mm IP65, NEMA 4X 1/8 DIN RS PRO Screw
RS Stock No. 613-7805
Mfr. Part No.701060/821-02
BrandJumo
TWD10,890.00
Each
units
Thermocouple 1 Relay - 1 230 V ac - - 0°C +55°C - - Panel Mount eTRON -
RS Stock No. 745-7936
Mfr. Part No.PJEZMNN0E0
BrandCarel
TWD2,333.00
Each
units
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 34mm - - PJ Easy -
RS Stock No. 535-0748
Mfr. Part No.E5C2-R20K AC100-240 0-1200
BrandOmron
TWD4,366.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 500-1036
Mfr. Part No.701050/821-02
BrandJumo
TWD4,404.00
Each
units
Thermocouple 1 Relay - 1 230 V ac 0 → 500 °C 90 x 22.5mm 0°C +500°C - - DIN Rail eTRON -
New
RS Stock No. 198-1175
BrandRS PRO
TWD4,250.00
Each
units
Thermocouple Analogue Relay 1 2 230 V - 96mm x 96mm - - - - - - -
RS Stock No. 124-1075
BrandRS PRO
TWD1,976.00
Each
units
NTC - 1 - 230 V ac -60 → +150 °C 77 x 35mm 0°C +50°C 61mm IP20, IP65 Panel Mount - Screw
RS Stock No. 913-9970
Mfr. Part No.PB00F0EP30
BrandCarel
TWD4,352.00
Each
units
- 3 Relay 1 3 230 V ac - - - - - - Panel Mount - Faston, Screw
RS Stock No. 124-1057
BrandRS PRO
TWD2,029.00
Each
units
NTC Relay 1 - 230 V ac - 54 x 94mm 0°C +50°C 68mm IP65 DIN Rail - Screw
RS Stock No. 481-7830
Mfr. Part No.PA201.005AX01
BrandBaumer
TWD4,321.00
Each
units
- - - - 10 → 70 V dc, 21 → 53 V ac - - - - - - - PA201 -
RS Stock No. 346-378
Mfr. Part No.FPRT100-110/240VAC
BrandTempatron
TWD3,911.00
Each
units
RTD - - - 110 240 V ac -50 +100 °C 48 x 48mm -10°C +50°C 112mm - - - -
RS Stock No. 762-2149
Mfr. Part No.ID+974-12V+NTC
BrandEliwell
TWD8,879.00
Each
units
NTC, PTC, RTD Digital 2 1 12 V -55 → +140 °C 74 x 32mm -5°C +55°C 60mm IP65 - IDPlus -