W1209 12V Temperature Controller with Probe and Built-in Relay

Name: W1209 12V Temperature Controller with Probe and Built-in Relay
Brand: satkit
SKU: Y020305-w1209
Price: 4.67 EUR
Availability: InStock

Brand: satkit

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4.67€

VAT included (Ex VAT: 3.80 €)

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2+	4.49 €	-4%
10+	4.25 €	-9%
20+	3.74 €	-20%

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The W1209 12V temperature controller is a compact and efficient module designed to control and regulate temperatures across a wide range from -50º to 110°C. Powered by 12V DC, this device is ideal for electronics projects, cooling systems, heating, and automation applications that require precise and reliable control.

This controller features a built-in relay capable of handling up to 10A, allowing you to switch electrical devices on or off according to the set temperature. The included 10K (0.5%) NTC submersible probe with a 50 cm cable makes direct measurement in liquids or humid environments easy, increasing its versatility.

Main features:

Temperature range: -50º to 110°C
Control resolution: 0.1°C in the -9.9 to 99.9°C range, and 1°C in other ranges
Control accuracy and hysteresis: 0.1°C
Supply and output voltage: DC 12V
Relay with up to 10A capacity for ON/OFF control
Compact dimensions: 48 x 40 mm
Water-resistant NTC submersible sensor
Display refresh rate: 0.5 seconds
Static current: 35mA, pull-in current: 65mA
Environmental conditions: ambient temperature -10 to 60°C, humidity 20% to 85%

Typical uses:

Temperature control in aquariums, heating systems, and cooling systems
Projects with Arduino and other microcontrollers that require thermal regulation
Overheating protection in electronic devices
Automation of industrial or domestic processes with temperature control

How to use the W1209 controller:

Connect the 12V power supply and the load device to the relay. The display will show the current temperature measured by the probe. Press the SET button to enter setup mode; use the + and - buttons to adjust the desired temperature. Confirm with SET and the relay will switch the load on or off according to the configured temperature.

The controller shows LED indicators for relay status and alerts for open sensor or out-of-range conditions. To access advanced functions, hold SET for 5 seconds to enter the main menu.

Compatibility: This module is compatible with systems using DC 12V power and can be easily integrated into projects with Arduino or other microcontrollers to expand thermal control capabilities.

Package contents:

1x W1209 12V digital temperature controller with display
1x 50 cm NTC submersible probe

Digital temperature control with a range of -50º to 110°C
Built-in 10A relay for ON/OFF control
50 cm NTC submersible probe included
12V DC supply and output
Digital display with high resolution and accuracy
Easy setup using SET and +/- buttons
Compact dimensions: 48 x 40 mm
Low power consumption: 35mA static, 65mA pull-in
Protection against open sensor and out-of-range temperature
Ideal for Arduino projects and automation systems

Customer Questions & Answers

How is the W1209 installed, and what electrical considerations should I bear in mind?

The W1209 is powered by a 12 V DC supply (it should provide at least 1 A for large switched loads). The relay supports up to 10 A at 12 VDC; it is recommended that the connected load does not exceed 80% of this limit to avoid premature wear. The probe cable should be kept away from sources of interference.

What is the estimated service life of the internal relay, and what maintenance is recommended?

The included relay has an estimated service life of 100,000 cycles at full load (10 A at 12 VDC), although this may be shortened if it is subjected to inductive loads without protection. It is recommended to check periodically for dirt, corrosion on the connections, and proper probe operation.

Does the W1209 comply with any specific safety or electrical protection standards?

The W1209 is a general-purpose module and does not come with CE, UL or similar factory certifications. It should be installed in protected enclosures if used in damp or dusty environments, and must never be handled while connected. It is not designed for critical safety applications.

What exactly is included in the package, and what are the module’s dimensions and weight?

The package includes the W1209 module and a 50 cm submersible NTC probe, and no additional accessories are included. The module measures 48 mm x 40 mm and weighs approximately 25 g, which makes it easy to integrate into confined spaces.

What temperature range does the W1209 12V control?

The W1209 12V controller regulates temperatures from -50º to 110°C with an accuracy of 0.1°C.

How do you connect the submersible probe?

The 50 cm NTC submersible probe connects directly to the module and can be placed in liquids or humid environments to measure temperature.

Is it compatible with Arduino?

Yes, the controller can be integrated into Arduino projects to control devices according to the measured temperature.

What current does the built-in relay support?

The relay supports a maximum current of 10A for controlling electrical loads.

How do you set the desired temperature?

Press the SET button to enter setup mode, then adjust the temperature with the + and - buttons, and confirm with SET.