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.


...
Read more Read less

Filters

Viewing 81 - 100 of 178 products
Results per page
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. 809-0985
Mfr. Part No.PJEZY0H000
BrandCarel
HK$804.92
Each
units
NTC - - - 230 V ac - 81 x 36mm -10°C +50°C 58mm - - PJ Easy -
RS Stock No. 198-637
Mfr. Part No.LR04841-100
HK$985.33
Each
units
J Type Thermocouple Relay 1 1 200 260 V ac - 48 x 48 (1/16 DIN)mm -10°C +50°C 86mm IP50 Panel Mount STATOP -
RS Stock No. 500-1137
Mfr. Part No.701050/831-31
BrandJumo
HK$1,120.43
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. 809-1026
Mfr. Part No.TC4810-54-110/230VAC
BrandTempatron
HK$1,101.93
Each
units
PT100 - - - 110 → 230 V ac - 48 x 48mm -10°C +50°C 89mm - 1/16 DIN - -
RS Stock No. 745-7939
Mfr. Part No.PJEZSNP000
BrandCarel
HK$809.04
Each
units
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
RS Stock No. 914-8482
Mfr. Part No.SRT-N118-1A21-1-4-001
BrandSimex
HK$2,131.16
Each
units
Thermocouple Relay 3 2 230 V ac -210 → +1200 (Type J) °C, -200 → +1000 (Type E) °C, -200 → +1300 (Type N) °C, -200 → +1370 (Type K) °C, -200 → +400 (Type T) °C, -50 → +1768 (Type R) °C, -50 → +1768 (Type S) °C, +250 → +1820 (Type B) °C 110 x 80mm 0°C +50°C 67mm IP67 Wall Mount - Screw
RS Stock No. 497-8979
Mfr. Part No.701050/811-31
BrandJumo
HK$1,120.43
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
HK$2,058.06
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. 198-851
Mfr. Part No.LR09604-106
HK$1,589.24
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. 736-5020
Mfr. Part No.D280-110-1000D-000
BrandP.M.A
HK$3,389.33
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 -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 Stock No. 746-3170
Mfr. Part No.E5LC6
BrandOmron
HK$908.91
Each
units
- - - - - - - - - - - - E5L -
RS Stock No. 613-7798
Mfr. Part No.701540/831-02
BrandJumo
HK$908.52
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. 535-0811
Mfr. Part No.E5C2-R40K AC100-240 0-800
BrandOmron
HK$1,110.82
Each
units
K Type Thermocouple Relay - 1 100 240 V ac - 48 x 48mm -10°C +55°C 86.7mm IP00, IP40, IP66 - E5C2 -
RS Stock No. 809-0957
Mfr. Part No.PJS5C0HF00
BrandCarel
HK$1,065.64
Each
units
NTC - - - 115 V ac - 59 x 67mm -10°C +50°C 156mm - - Easy XL -
RS Stock No. 798-4104
Mfr. Part No.40T-72-4-01-RR-00-9
BrandGefran
HK$2,649.62
Each
units
Thermocouple Relay - 2 11 27 V dc, 18 27 V ac - 72 x 36mm 0°C +50°C 54mm IP65 - 40T72 -
RS Stock No. 344-603
Mfr. Part No.TC4830-51-110/230VAC
BrandTempatron
HK$1,059.46
Each
units
PT100 Relay - 1 110 → 230 V ac - 48 x 48mm - - 91mm IP40 1/16 DIN - -
RS Stock No. 906-7728
Mfr. Part No.TSS2-2400
HK$806.98
Each
units
NTC, PTC SPDT Relay 1 2 24 V ac/dc - 76.2 x 36.12mm 0°C +70°C 61.91mm IP64 Panel Mount TSS2 -
RS Stock No. 913-9970
Mfr. Part No.PB00F0EP30
BrandCarel
HK$1,107.16
Each
units
- 3 Relay 1 3 230 V ac - - - - - - Panel Mount - Faston, Screw
RS Stock No. 344-120
Mfr. Part No.TC4830-02-110/230VAC
BrandTempatron
HK$1,058.43
Each
units
K Type Thermocouple Relay - 1 110 → 230 V ac - 48 x 48mm - - 91mm IP40 1/16 DIN - -
RS Stock No. 346-378
Mfr. Part No.FPRT100-110/240VAC
BrandTempatron
HK$994.94
Each
units
RTD - - - 110 240 V ac -50 +100 °C 48 x 48mm -10°C +50°C 112mm - - - -
Related Products
Closed ball bushings and plain bearings for XY ...
Description:
Closed ball bushings and plain bearings for XY positioning, pick and place applications and precision linear motion systems.,Plain bearings to be used in heavy shock, vibration, high acceleration or high speed situations which are unsuitable for linear ball bearings.,Note that ...
Standard SKF linear bearings can be used to ...
Description:
Standard SKF linear bearings can be used to construct linear guidance systems over a wide variety of applications. These bearings are manufactured to ISO 10285 standards. SKF linear ball bearings have the advantage of being corrosion resistant due to a ...
Closed ball bushings and plain bearings for XY ...
Description:
Closed ball bushings and plain bearings for XY positioning, pick and place applications and precision linear motion systems.,Plain bearings to be used in heavy shock, vibration, high acceleration or high speed situations which are unsuitable for linear ball bearings.,Note that ...
Closed ball bushings and plain bearings for XY ...
Description:
Closed ball bushings and plain bearings for XY positioning, pick and place applications and precision linear motion systems.,Plain bearings to be used in heavy shock, vibration, high acceleration or high speed situations which are unsuitable for linear ball bearings.,Note that ...