Overview

Take precise control of heating and cooling with the W3230 mini digital temperature controller. Compact yet powerful, this thermostat regulator keeps your temperature exactly where you want it, whether you are managing a fermentation chamber, a reptile terrarium, an aquarium, a greenhouse, or a homemade incubator.

Thanks to its bright red/blue digital display and simple push-button programming, you can switch between heating and cooling modes, set upper and lower limits, and fine-tune the return difference in seconds. The included waterproof NTC10K sensor probe delivers reliable readings even in damp environments.

With a high-capacity relay output (20A at 12V / 10A at 220V), this controller drives most common heating pads, fans, and cooling units directly, making it a versatile building block for DIY automation and household temperature projects.

Key Features

• Temperature Control Range: -55°C to 120°C for wide heating and cooling applications
• Measurement Accuracy: ±0.1°C with 0.1°C resolution in the -9.9 to 99.9 range
• Sensor: NTC10K waterproof probe with a 1 m sensor cable
• Relay Output: 20A at 12V / 10A at 220V contact capacity
• Display: Red/blue digital readout for clear at-a-glance monitoring
• Dimensions: 79 mm x 43 mm x 26 mm with a 73 mm x 39 mm cutout size
• Operating Environment: -10°C to 60°C with 20%-85% relative humidity
• Certification: CE marked

Highlights

• ✓ Keeps temperatures stable automatically, so you spend less time checking and adjusting by hand
• ✓ Heating and cooling modes in one compact unit cover a wide range of projects
• ✓ Waterproof sensor probe lets you monitor damp spaces such as aquariums and terrariums
• ✓ Easy push-button setup with adjustable upper limit, lower limit, and delay start
• ✓ Small panel-mount body fits neatly into custom enclosures and control boxes

Usage

Ideal for home and hobby temperature control: fermentation and proofing boxes, reptile and amphibian terrariums, aquarium heaters, seedling and greenhouse setups, DIY incubators, and general heating or cooling fan control. Simply mount the controller through the 73 mm x 39 mm cutout, connect your load to the relay output, and place the waterproof probe where you need the reading.

In the Box

• 1 x W3230 digital temperature controller
• 1 x NTC10K waterproof temperature sensor with 1 m cable