12V Humidity switch relay module (Blue)

Description

Description

The 12V Humidity Switch Relay Module (Blue) is an intelligent environmental control device designed to automate equipment based on ambient humidity levels. Operating on a stable 12V DC input, this module features a high-precision humidity sensor and a built-in relay that acts as an automatic switch. When the surrounding humidity reaches your preset threshold, the relay activates or deactivates connected devices such as exhaust fans, dehumidifiers, mist makers, or pumps.

The module includes a clear blue LED display and tactile push buttons for easy configuration. With its ability to switch between humidification and dehumidification modes, this single module solves both over-humidity and under-humidity problems. Housed in a compact, industrial-style casing, it is suitable for DIY projects, greenhouse automation, HVAC systems, industrial drying cabinets, and smart home integrations—all without needing a programmable logic controller (PLC) or microcontroller.

Key Features

• Dual Operating Modes – Switchable between Humidification (turn on when dry) and Dehumidification (turn on when wet) mode.

• Built-in 12V Relay – Capable of controlling high-power devices (e.g., fans, pumps, solenoid valves) directly.

• Adjustable Hysteresis – Prevents relay chattering by allowing a user-set switching differential.

• Real-Time Humidity Display – Blue backlit digital screen shows current humidity percentage.

• Simple Calibration – One-button sensor calibration for accurate readings.

• Non-Volatile Memory – Saves your settings permanently, even after power loss.

• Wide Application – Works for home grow tents, reptile terrariums, cigar humidors, printing workshops, and server rooms.

Technical Parameters