W12009 12V DC Digital Temperature Control Switch Thermostat Module with NTC Waterproof Probe

The W1209 12V DC Digital Temperature Control Switch is a high-accuracy, intelligent micro-thermostat module engineered to automate environment climate control systems. Operating on a stable DC 12V supply, this standalone processing board allows users to manage heating or cooling systems without needing an external microcontroller. The kit includes a detached, highly sensitive NTC (10K 0.5%) thermistor probe encapsulated in a waterproof stainless steel shell, enabling precise, noise-free temperature monitoring in deep liquids, soil, or high-humidity environments.

The interface is centered around a bright, high-visibility 3-digit red LED segment display that tracks real-time thermal values with a sharp 0.1°C resolution. To manage high-power external hardware, the module features a heavy-duty, genuine Songle mechanical relay capable of switching demanding electrical loads up to 20A at 14VDC or 125VAC. Using three top-mounted physical tactile buttons (Set, Plus, and Minus), users can enter the onboard firmware program to customize critical submenus from P0 to P6—including setting the mode to Heating (H) or Cooling (C), setting backlash hysteresis intervals, and configuring over-temperature alarms. It is an exceptional choice for DIY egg incubators, home aquariums, plant terrariums, server rack ventilation fans, and automated hydroponic setups.

• Heavy-Duty Relay Output: Onboard Songle relay directly switches alternating or direct current loads up to 20A for robust machine control.
• Precision NTC Waterproof Probe: Shipped with a durable, liquid-submersible stainless steel thermal sensor probe for versatile deployment.
• Intelligent Menu Programming: Built-in submenus (P0–P6) let you calibrate hysteresis, set delay starts, lock settings, and toggle heat/cool targets.
• High-Resolution LED Panel: Bright 3-digit segment display offers easy runtime data tracking with precise decimal increments.
• Compact Independent Form Factor: Space-conscious blueprint drops neatly into project dashboards, control panels, or custom equipment enclosures.

• Model Designation: W1209 Standard Digital Thermostat Node
• Required Input Voltage: DC 12V
• Temperature Tracking Scope: -50°C to +110°C
• Measurement Resolution Accuracy: 0.1°C (Within the -9.9°C to 99.9°C bracket) / 1°C outside that band
• Relay Output Contact Ratings: Max 20A at 14VDC / Max 20A at 125VAC
• Sensor Probe Composition: NTC (10K 0.5%) Waterproof Thermistor on an extended black lead cable
• Control Button Functions: 3x Tactile Swapped Switches (SET, +, -)
• Rear Screw Junction Terminals: 4-Position Terminal Block (+12V, GND Power Inputs / K0, K1 Isolated Relay Output Contacts)

If you want, tell me if you need help with:

• Providing a quick guide to program the internal configuration submenus (P0 for Heat/Cool and P1 for Hysteresis)
• Formatting an SEO-optimized bulleted list for Amazon or AliExpress storefronts
• Designing a clear wiring schematic guide to show how to wire the isolated K0/K1 relay contacts to a 110V/220V load