This is the 12V variant of the W1209 12V Digital Temperature Controller Module With Display and NTC Temperature Sensor Standard Quality in Temperature Meter, Temperature & Humidity Sensor. Available at ₹149.86 (₹127.00 + GST) with free shipping across India.

Looking for W1209 Module? W1209 12V Digital Temperature Controller Module With Display and NTC Temperature Sensor Standard Quality is available at Zbotic with fast shipping across India.

W1209 12V Digital Temperature Controller Module

With Display and NTC Temperature Sensor – Standard Quality

Overview

• This digital temperature controller module features a waterproof NTC temperature sensor and is designed to control electrical devices based on the temperature it detects. It’s a cost-effective and highly functional solution, ideal for a wide range of applications.
• Powered by a 12V source, the module is equipped with a 7-segment display that shows the current temperature in °C. It also includes three buttons that allow you to easily set your desired temperature range and other parameters.
• No programming skills are required, as it comes with a built-in microcontroller. The onboard relay can switch up to 240V AC at 5A or 14V DC at 10A, making it suitable for controlling various electrical devices. The relay’s status is indicated by an LED light.
• The NTC thermistor sensor provides highly accurate temperature measurements with a precision of 0.1°C, and being waterproof, it ensures reliable operation in different environments.

Display & Settings

Displaying the Current Temperature

• By default, the thermostat shows the current temperature in °C.

• When in any other mode, making no input for ~5 seconds will return it to this display.

Setting the Trigger Temperature

1. Press the SET button → display flashes.

2. Use + / – to adjust trigger temperature (0.1°C increments).

3. Wait ~2 seconds → value is stored → display returns to current temperature.

Setting Parameters

• Long press SET (≥5s) → display shows P0.

• Use + / – to cycle through parameters (P0 – P6).

• Press SET to edit a parameter.

• Adjust with + / –, then press SET to confirm.

• No input for ~5s → returns to default temperature display.

Parameter Settings

P0 – Cooling or Heating

• C (default): Relay energizes when temperature is reached (use for cooling/AC).

• H: Relay de-energizes when temperature is reached (use for heating).

P1 – Hysteresis

• Sets how much temperature must change before relay switches.

• Example: If trigger = 25°C, hysteresis = 2°C → relay off below 23°C.

• Prevents rapid switching.

P2 – Upper Limit

• Limits maximum trigger temperature (default = 110°C).

P3 – Lower Limit

• Limits minimum trigger temperature (default = -39°C).

P4 – Temperature Offset Correction

• Adjusts reading if probe has offset (e.g., long cable).

P5 – Trigger Delay

• Delays relay switching after reaching trigger.

• Range: 0–10 mins (in 1-min steps).

P6 – High Temperature Alarm

• Sets alarm cutoff temperature.

• Relay turns OFF at set value → display shows “—”.

• Relay won’t re-energize until below alarm threshold.

• Default = OFF.

Settings Chart

👉 Long press + / – to reset all values to default.

Applications

• To measure and display temperature.

• To turn any application ON/OFF based on temperature (AC or DC).

• Example Projects:

  • Fire Alarm System

  • Auto Cut-Off Electric Water Heater

Features

Power Consumption

• Static Current: ≤35mA

• Current: ≤65mA

Environmental Requirements

• Operating Temperature: -10 ~ 60°C

• Humidity: 20–85%

Package Includes

• 1 x W1209 12V Digital Temperature Controller Module

• 1 x Waterproof NTC Temperature Sensor

Datasheet:

W1209 12V Digital Temperature Controller Module With Overview

The W1209 12V Digital Temperature Controller Module is a compact control board with a built-in 7-segment display and NTC10K temperature sensor. It measures temperatures from –50°C to +110°C and switches a load via its 10A relay output, making it ideal for precise heating or cooling control.

Key Features of W1209 12V Digital Temperature Controller Module With

• Wide control range from –50°C to +110°C with 0.1°C resolution (–9.9°C to 99.9°C) and 1°C beyond
• Accurate readings at ±0.1°C and 0.5 s refresh rate on a clear 7-segment LED display
• Includes a 0.5 m waterproof NTC10K temperature sensor for reliable measurements
• Single-channel relay output rated up to 10 A for direct control of heaters, fans or pumps
• Runs on a stable 12 V DC supply, low power consumption
• Genuine product with fast shipping across India from Zbotic

Applications and Use Cases

• Incubator and hatchery temperature regulation
• Aquarium heater safety cutoff and climate control
• Food storage cabinets or fermentation chambers
• DIY brewing or distillation temperature management
• Reflow soldering station temperature control
• Greenhouse or terrarium environmental regulation

How to Use W1209 12V Digital Temperature Controller Module With

Connect the 12 V DC supply to the module’s Vin and GND terminals, attach the NTC10K sensor leads to the input pins, and wire your heating or cooling device to the relay output. Power on, press the “Set” button to enter the target temperature, use “Up/Down” buttons to adjust, then press “Set” again to confirm. The module will automatically switch the relay when the measured temperature crosses your setpoint.

Why Buy from Zbotic?

• Genuine Products: All items sourced from authorized distributors
• Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
• Free Shipping: Free delivery on qualifying orders
• COD Available: Cash on Delivery, UPI, cards, net banking
• Technical Support: Expert help for setup and troubleshooting
• Easy Returns: Hassle-free replacement for defective products

Frequently Asked Questions

What temperature range does the W1209 support?

The W1209 supports a measurement and control range from –50°C to +110°C, with fine 0.1°C resolution between –9.9°C and 99.9°C, and 1°C steps beyond that range.

How do I set the desired temperature on the W1209?

Press the “Set” button once to display the setpoint value (P1). Use the “Up” and “Down” buttons to adjust to your desired temperature, then press “Set” again to save and resume normal operation.

What is the maximum load current of the relay output?

The built-in relay is rated for up to 10 A resistive load at 12 V DC, suitable for most small motors, heaters, fans, and pumps.

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