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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Omschrijving Prijs 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-stocknr. 745-7936
FabrikantnummerPJEZMNN0E0
FabrikantCarel
€ 74,57
Each
Aantal stuks
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 34mm - - PJ Easy -
RS-stocknr. 745-7942
FabrikantnummerPJEZS0A000
FabrikantCarel
€ 99,20
Each
Aantal stuks
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
RS-stocknr. 511-7440
FabrikantnummerIR33S0LR00
FabrikantCarel
€ 113,97
Each
Aantal stuks
NTC - - - 12 → 24 V ac/dc -50 → +90 °C 76.2 x 34.2mm -10°C +50°C 94mm - - IR33 -
RS-stocknr. 809-0975
FabrikantnummerIREVC7HN00
FabrikantCarel
€ 178,82
Each
Aantal stuks
NTC - - - 230 V ac - 76.2 x 34.7mm - - 79.5mm - - IR33+ -
RS-stocknr. 809-0991
FabrikantnummerDN33Z9MR20
FabrikantCarel
€ 162,77
Each
Aantal stuks
NTC, PT100, PTC - - 4 24 V ac, 30 V dc Carel DN33 110 x 70mm -10°C +60°C 60mm - - DN33 -
RS-stocknr. 511-7478
FabrikantnummerIR33C0LR00
FabrikantCarel
€ 143,12
Each
Aantal stuks
NTC - - - 12 → 24 V ac -50 → +90 °C 76.2 x 34.2mm -10°C +50°C 94mm - - IR33 -
RS-stocknr. 913-9927
FabrikantnummerWE00S1EN00
FabrikantCarel
€ 176,53
Each
Aantal stuks
Digital 1 Relay 1 1 230 V ac - 290 x 128mm - - - IP65 Wall Mount - Screw
RS-stocknr. 809-1001
FabrikantnummerIR33S0EN00
FabrikantCarel
€ 110,53
Each
Aantal stuks
NTC - - - 230 V ac - 76.2 x 34.4mm -10°C +60°C 70.5mm - - IR33 -
RS-stocknr. 783-4724
FabrikantnummerPZD0C0P001
FabrikantCarel
€ 130,09
Each
Aantal stuks
NTC - - - 115 V ac, 230 V ac - 81 x 36mm -10°C +50°C 58mm - - PZD -
RS-stocknr. 913-9924
FabrikantnummerWB000SW0F0
FabrikantCarel
€ 295,00
Each
Aantal stuks
Digital 1 Relay 1 1 230 V ac - 71 x 29mm - - - IP65 Panel Mount - Screw
RS-stocknr. 809-0979
FabrikantnummerIREVS0EN00
FabrikantCarel
€ 81,35
Each
Aantal stuks
NTC - - - 230 V ac - 76.2 x 34.7mm - - 79.5mm - - IR33+ -
RS-stocknr. 745-7933
FabrikantnummerPJEZS0P000
FabrikantCarel
€ 73,04
Each
Aantal stuks
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
RS-stocknr. 913-9986
FabrikantnummerPJEZY00000
FabrikantCarel
€ 98,55
Each
Aantal stuks
Digital 2 Relay 1 2 230 V ac - 81 x 36mm - - - IP65 Panel Mount - Screw
RS-stocknr. 745-7939
FabrikantnummerPJEZSNP000
FabrikantCarel
€ 94,20
Each
Aantal stuks
NTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -
RS-stocknr. 809-0966
FabrikantnummerIREVS0LN00
FabrikantCarel
€ 103,05
Each
Aantal stuks
NTC - - - 24 V ac - 76.2 x 34.7mm - - 79.5mm - - IR33+ -
RS-stocknr. 913-9974
FabrikantnummerPB00H0HB00
FabrikantCarel
€ 194,68
Each
Aantal stuks
Digital 5 Relay 1 5 230 V ac - 167 x 36mm -10°C +65°C - IP65 Panel Mount PB00 Screw
RS-stocknr. 511-7456
FabrikantnummerIR33Y0LR00
FabrikantCarel
€ 93,51
Each
Aantal stuks
NTC - - - 12 24 V ac -50 +90 °C 76.2 x 34.2mm -10°C +50°C 94mm - - IR33 -
RS-stocknr. 913-9977
FabrikantnummerPB00Y0EV30
FabrikantCarel
€ 133,18
Each
Aantal stuks
- 3 Relay 1 3 230 V ac - - - - - - Panel Mount - Screw
RS-stocknr. 809-0957
FabrikantnummerPJS5C0HF00
FabrikantCarel
€ 143,68
Each
Aantal stuks
NTC - - - 115 V ac - 59 x 67mm -10°C +50°C 156mm - - Easy XL -
RS-stocknr. 745-7945
FabrikantnummerPJEZS6P000
FabrikantCarel
€ 95,54
Each
Aantal stuks
PTC - - - 230 V ac -50 → +90 °C 36 x 81mm - - 61mm - - PJ Easy -