Pro Leaf Digital Humidity Controller - HUM-B1 | 5-90% RH Control | 10A

The Pro Leaf HUM-B1 Digital Humidity Controller offers precise control of humidity levels for indoor growing, hydroponics, or climate-managed environments. Designed to automate humidifiers or dehumidifiers, this plug-and-play unit allows you to set your ideal day and night humidity ranges with independent adjustable dials.

With a wide control range of 5% to 90% RH, 3% accuracy, and a 5% dead-band (hysteresis) for stable performance, the HUM-B1 ensures optimal air moisture levels without constant fluctuations. The included 15ft humidity sensor cord provides accurate, real-time readings even at a distance from the main control unit.

Compatible with standard 220-240V outlets, and rated for up to 10 amps, its ideal for grow tents, greenhouses, climate rooms, and commercial indoor gardens where environmental control is critical to plant health and productivity.

Features

• Dual Mode Control - Easily set to run either a humidifier or dehumidifier
• Day/Night Independent Settings - Dial-in separate RH targets for different lighting cycles
• Precision Humidity Control - Wide range from 5% to 90% RH with 3% accuracy
• Stable Operation - 5% RH hysteresis prevents rapid cycling of devices
• 15ft Sensor Probe - Flexible placement for accurate humidity monitoring
• 10 Amp Rated Output - Supports larger capacity devices on a 220240V circuit
• Easy to Use Interface - Intuitive analog dial control
• Indoor-Use Only - For grow rooms, hydroponic setups, or climate-sensitive indoor applications
• Compact & Durable - Lightweight and rugged housing for reliable long-term use

[1] x Pro Leaf Digital Humidity Controller - HUM-B1 | 5-90% RH Control | 10A