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Kemo Temperature Switch Thermostat DC 12V

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Quoting product code: N20DD


About this product


Product overview

• Electronically adjust your temperature with this switch
• Connect to a car heater, water cooler and many more
• Working Voltage: DC 12V
• Cable length of up to 1m

Adjustable electronic temperature switch. The sensor (Ø 5 mm) may be connected with the control electronics via a cable with a length of up to 1 m. This Temperature Swith Thermostat requires a stabilised 12V power input to operate as intended.

Rated 2 out of 5 by from Hopeless on a boat I purchased this to control a small extractor fan (computer type) to draw air through the locker in which our boat fridges compressor is mounted. Initially it worked fine and the fridge compressor ran less frequently due to the lower ambient temperature in the locker. Not long after installation I noticed that the switch started cycling between on/off whenever any other service (such as a water pump) started/ran. I therefore consulted the documentation to discover that it states that the switches main 12v (not the power it is controlling) must be a stabilised 12v, this just isn't possible on a boat (or similar) particularly when the engine is not charging the batteries. I'll leave it in place & put up with the clicking but I'm not expecting it to last too long. I've emailed the manufacturer and Maplins's customer service email doesn't appear to work.
Date published: 2017-04-13
Rated 5 out of 5 by from Does exactly what it said on the tin. I purchased 2 of these temperature switches so as to set up cooling/circulating fans in the green house. The switches are on a solar/battery powered system and require little attention from me. The switch is easy to set up but the only concern is the external resistor in a green house environment, dampness etc, so have coated the resistor connections with hot glue as an insulation for this environment. The choice of terminals for "permanent on switch off" or" permanent off switch on" makes it an ideal choice for any temperature controlling switch set up.
Date published: 2016-08-22
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Technical Data
Operating voltage 12 - 15 V/DC stabilized (max. 0,1 A)
Temperature range approx. 0 - 100°C
Switching output relay contact 1 x switch-over, max. 5 A, 25 V
The sensor (Ø 5 mm) may be connected with the control electronics via a cable with a length of up to 1 m
Dimensions ca. 60 x 45 x 25 mm (without fastening straps)

Can anyone tell me what the differential of this device is., and is the differential adjustable. I would like to switch a fan on at 40-50c  and off at 30-40c. to cool a heater exhaust.

Asked by: Davo
The temperature window for switching is 3-7 degrees (this can vary depending on whether the sensor is extended from the unit or not). Full details can be found in the manual available at the following link;
Answered by: Gareth
Date published: 2017-08-16

[1] Is the relay energised in an over-temperature condition? I want to control a heating circuit when the temperature drops below a set value. [2] What additional protection is required when using this module in a car, e.g. power filtering?

Asked by: Richard
Please see the data sheet link below
Answered by: Billy
Date published: 2017-08-07

I want the switch to bring the fan on when the temperature rises and switch off when the temperature reaches the set temperature which is the wiring open or closed also does the sensor need to be wired or can it be mounted direct to the unit

Asked by: colin d
Please see the data sheet link below
Answered by: Dominic
Date published: 2017-08-02

I want to put a fan on the back of my camper fridge to control the air temperature between 25c  to  30c automatically  will this do the job? Peter

Asked by: Pete
As long as you are operating with a voltage between 12 - 15 V it would work.
Answered by: Billy
Date published: 2017-04-11

Can the sensor be mounted in water to activate a fan to blow against an aquarium. I want to use the controller to activate a 12v pc fan but only if the sensor can be mounted in the tank. 

Asked by: Simon
It is possible to affix the thermal sensor to an extension wire in order to move away from the module (no more than 1m. As long as the sensor is electrically insulated properly and the section being submerged is rendered fully waterproof then this may be suitable for your intended use. Full details can be found n the product manual which can be viewed at the following link;
Answered by: Gareth
Date published: 2016-06-10

Will this switch on a 12v when it reaches a temp, i want it to turn on a fan when it gets too warm, not turn on when it gets too cold, can it do this please?

Asked by: Bashy
The internal switch can be configured as either normally open or normally closed so it should be possible to wire this to suit your intended use.
Answered by: Gareth
Date published: 2016-04-24

I want to switch a fan on at a set temperature. will this do that

Asked by: Kevin
The item is an electronic temperature switch so can switch on or off at set temps.
Answered by: Dominic
Date published: 2015-12-09

What is the temperature difference between cut in and cut out please.

Asked by: Michael
Full item details can be found in the link below.
Answered by: Dominic
Date published: 2015-11-10
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