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Pro Leaf Digital Humidity Controller - HUM-B1

Humidify / Dehumidify

SKU: CTRL90041
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The Pro Leaf HUM-B1 Digital Humidity Controller is an easy-to-use, precision tool designed to maintain consistent humidity levels in indoor grow environments, greenhouses, or climate-controlled rooms. Whether you're controlling a humidifier or dehumidifier, this device allows you to set custom day and night relative humidity levels independently using simple front-facing dials.

The HUM-B1 supports a wide range of 5% to 90% rH and operates using a 5% dead-band, ensuring stable control with minimal fluctuations. With an accuracy of ±3% rH, it helps prevent moisture-related issues like mould, mildew, or poor plant transpiration.

Equipped with a 15 ft sensor cord, the controller offers flexible placement and responsive feedback, making it ideal for mid-sized grow rooms or indoor garden setups. Rated at 10 amps, it plugs into a standard 220-240V outlet, giving growers reliable, programmable climate control without complex wiring or automation systems.

Features

  • Dual Day/Night Settings: Set different humidity levels for day and night cycles to optimise plant health.
  • Wide Control Range: Adjustable from 5% to 90% relative humidity via precision dials.
  • 5% Dead-Band: Maintains humidity within ±2.5% of your setpoint to prevent overcorrection.
  • High Accuracy: Operates with ±3% rH tolerance for precise environmental control.
  • Long Sensor Cord: 15 ft sensor cable allows accurate readings from anywhere in your grow room.
  • Plug-and-Play Design: Supports up to 10A on a standard 220-240V outlet—no wiring needed.
  • Compact & Durable: Lightweight yet rugged unit suitable for all indoor grow environments.

Specifications

  • Model: HUM-B1
  • Max Load: 10 amps @ 220–240V (50/60Hz)
  • Humidity Range: 5% – 90% rH
  • Humidity Accuracy: ±3% rH
  • Dead-Band: 5% rH (Hysteresis)
  • Sensor Cord: 15 ft long
  • Weight: 2.1 lbs
  • Dimensions: 5.07" x 4.68" x 1.95"
  • Indoor Use Only
  • Operating Temp: 50°F to 95°F
  • Max Relative Humidity: 95%

In The Box

  • [1] x Pro Leaf Digital Humidity Controller - HUM-B1

1-Year Replacement

  • Warranty If the product is faulty within the warranty period, the product will be replaced with a new one.
  • Please send the product to the following address on the contact us page.