HUMIDITY CONTROLLER – [ABM]

A humidity controller, or humidistat, is a device that regulates the humidity levels in an enclosed space by automatically activating or deactivating a humidifier or dehumidifier. They are used in homes, greenhouses, grow tents, and other applications to maintain optimal air moisture. 

• Control method: Controllers can be simple plug-and-play devices or more advanced smart models with Wi-Fi connectivity and app-based control.
• Sensor accuracy: Check the sensor's specified accuracy. A good residential controller offers an accuracy of $\pm$3–5% Relative Humidity (RH), while high-precision models provide even tighter control.
• Dual-relay output: For controlling both a humidifier and a dehumidifier from the same unit, choose a model with dual relays.
• Alarm functions: Many controllers offer wireless alarms that alert you via the app when humidity levels go outside your preset range.
• Application-specific features: For specialized uses like grow tents, consider controllers with additional features such as VPD (Vapor Pressure Deficit) calculations.
• Power requirements: Confirm the power specifications, including voltage and amperage, to ensure compatibility with your humidifier or dehumidifierstill cannot find any specific product information for a humidity controller with the exact model number 
  
  UC 4004

  . The code seems to be a generic part number for other products or perhaps a specific, private-label industrial controller not widely listed online.

  However, I can provide more details about common types of 4-inch display panel-mount humidity controllers and where the model number might fit in.
  Generic 4-Inch Industrial Humidity Controllers
  Industrial controllers with a 4-inch display are typically used in applications where visibility from a distance is necessary, such as in control panels for:
  • Incubators
  • Greenhouses
  • HVAC systems
  • Switchgear/electrical cabinets (for anti-condensation) 
  General Features:
  • Display: Large LED or LCD screens, often dual displays (one for current humidity, one for setpoint, or one for humidity and one for temperature).
  • Input: They usually accept input from a separate, remote Relative Humidity (RH) sensor (e.g., 4-20mA signal).
  • Output: They have relay outputs to trigger external devices like a humidifier, dehumidifier, heater, or fan.
  • Power: Common power requirements are 110-220V AC/DC.
  • Control Type: Simple ON-OFF control or potentially more advanced PID control for precise stability.
  • Mounting: Designed for flush panel mounting (fitting into a cutout on a control panel). 
  Potential Manufacturer Information (Inference)
  The model number format "UC4004" is not a standard industry format for a major brand like Inkbird or Selec. It may belong to a smaller, regional manufacturer or a custom order part. The "UC" might stand for "Universal Controller" or a brand name like "U-Control" or "Unit Control."
  What You Can Do
  1. Check the Manufacturer: The manufacturer's name should be on a label on the device itself.
  2. Locate a Datasheet: With the manufacturer's name, you can search for the official datasheet or manual. This document will detail its installation size, wiring diagram, programming instructions, and capacity (amperage rating).
  3. Alternative Search: If you can't find the manufacturer, you might try searching for common alternatives with similar specifications, such as "
     
     Selec HC404

     " or "

     MH13001

     " (though these are smaller than 4 inches)