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Home / Computer Hardware, Monitors & Peripherals / Thermistor Sensor Module Relay Switch Smart Car Accessory Ambient Temperature Sensor (3/4-Wire)

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Sensor Type NTC Thermistor
Input Voltage DC 5V to 24V
Output Type Relay Switch Signal
Temperature Range -40°C to 125°C
Measurement Accuracy ±1.0°C
Relay Load Capacity 10A 250VAC / 10A 30VDC
Wire Configuration 3-Wire or 4-Wire Selectable
Probe Material Stainless Steel 304
PCB Dimensions 45mm x 25mm x 15mm
Operating Humidity 5% to 95% RH Non-Condensing

5 reviews

A

Anonymous

Apr 02, 2026

Rating: 4/5

Accurate but instructions could be better

The temperature reading is quite accurate compared to my multimeter. I wish the manual had more details on the potentiometer adjustment for the threshold.

A

Anonymous

Mar 30, 2026

Rating: 5/5

Great for DIY Automotive Projects

This module works perfectly for controlling my cooling fans. The relay clicks loudly but feels solid. Wiring was straightforward with the provided diagram.

A

Anonymous

Feb 12, 2026

Rating: 3/5

Works but cables are short

The module functions correctly, but the sensor cable is shorter than I expected. I had to extend it for my specific application.

A

Anonymous

Feb 07, 2026

Rating: 5/5

Product as described

Fast shipping and the item matches the description exactly. The 3-wire mode worked fine for my simple setup. Good value for the price.

A

Anonymous

Feb 01, 2026

Rating: 5/5

Reliable relay switching

I've been using this for a month in a humid environment. The probe is sealed well and the relay switches cleanly without chatter.

5 FAQ

Q: What is the wire color code for connection?

A: Typically Red is VCC, Black is GND, and Yellow or White is the Signal output. Please refer to the silkscreen on the PCB for confirmation.

Q: Can this module operate on a 12V vehicle battery system?

A: Yes, the operating voltage range is DC 5V to 24V, so it is fully compatible with standard 12V automotive systems.

Q: Can I adjust the temperature trigger point?

A: Yes, there is a blue potentiometer on the board that allows you to calibrate the temperature threshold at which the relay switches.

Q: Is the temperature probe waterproof?

A: The stainless steel probe head is IP65 rated and water-resistant, but the PCB module itself should be kept in a dry enclosure.

Q: Does the relay make a loud noise when switching?

A: Yes, it uses a mechanical relay which produces an audible click when activated. This is normal operation for this type of component.

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