The user interface (display and controls) is an integral part of a humidity sensor and controller system, serving as the primary point of interaction between the operator and the device. It typically consists of a display screen (LCD, LED, or touchscreen) that shows real-time humidity readings, setpoints, system status, and alerts, along with physical or touch-based controls (buttons, knobs, or touch panels) that allow users to configure settings, adjust parameters, and operate the controller. This component translates sensor data into actionable information and enables precise control over environmental humidity levels. The display is typically a 2.4-inch LCD with a resolution of 128x64 pixels, available in TN or STN variants, optionally with a backlight. The backlight is LED-based, white or green, with adjustable brightness. The keypad is a sealed membrane type with five keys (up, down, left, right, enter) providing tactile feedback. The interface operates within a temperature range of -20 to 60 °C (storage -30 to 70 °C) and a relative humidity range of 10 to 90 % RH (non-condensing). It has an ingress protection rating of IP54, meaning it is dust-protected and resistant to water splashing. The supply voltage is 24 V DC ±10% with reverse polarity protection, and power consumption is ≤3 W with backlight on. The device weighs ≤200 g without packaging and has dimensions of 96x96x50 mm (W x H x D) for a panel cutout of 92x92 mm, conforming to DIN 43700. The interface is designed for industrial environments and complies with relevant IEC standards for temperature, humidity, and ingress protection. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement.
The display receives electrical signals from the controller's processing unit, converting them into visual representations of humidity data and system status. Control inputs from buttons or touch interfaces generate electrical signals that are sent back to the controller to adjust settings or initiate actions. The interface may include backlighting for visibility in various lighting conditions and often incorporates protective layers against moisture and contaminants. The membrane keypad is sealed to prevent ingress of dust and water, and the display cover is made of polycarbonate or acrylic for durability. The interface operates on a 24 V DC supply and communicates with the controller via electrical connections. It is designed to withstand specified environmental conditions, including temperature and humidity ranges, and provides a reliable means for operators to monitor and control humidity levels.
