Digital Humidity Controller – 5-99% RH, ETL Listed – Midwest Grow Kits

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Digital Humidity Controller for High Humidity Environments

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$2799 $3499
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Digital humidity controller with 5-99% RH range and moisture-resistant probe. Plug-and-play automation for fruiting chambers, tents, and greenhouses. ETL listed.

🔥 127 purchased in the last 30 days
⭐ 1000+ units sold

Description

The Digital Humidity Controller (W2023) gives you a simple, reliable way to hold steady humidity in mushroom fruiting chambers, grow tents, greenhouses, and automated humidification setups. Plug your humidifier into the controller, place the moisture-resistant probe, and set your target range — the controller handles the rest.

  • RH Range5–99%
  • Accuracy±0.1% RH
  • ProbeMoisture-Resistant
  • DisplayLarge LED
  • CertificationETL Listed
  • Humidity Control
  • Plug-and-Play
  • Wall-Hanging Design
  • ETL Listed
  • Grower's Select

Why Growers Choose This Controller

  • Wide 5–99% RH range covers everything from dry incubation to high-humidity fruiting chambers
  • Moisture-resistant probe built to hold up in high-humidity grow environments
  • Large LED display stays readable even in a dim grow room
  • Simple two-button programming — set your range and walk away
  • Plug-and-play operation — connect your humidifier and start controlling humidity in seconds
  • Wall-hanging design keeps cables organized and installations clean

Specifications

Specification Detail
Humidity Control Range 5% – 99% relative humidity
Sensor Accuracy ±0.1% RH
Probe Moisture-resistant probe for high-humidity environments
Display Large, easy-to-read LED
Controls Two-button programming
Mounting Wall-hanging design
Safety Certification ETL Listed

How It Works

  1. Plug your humidifier into the controller's output outlet.
  2. Place the moisture-resistant probe inside your fruiting chamber, tent, or greenhouse.
  3. Use the two-button controls to set your target humidity range.
  4. The controller automatically cycles your humidifier on and off to hold that range.

Common Uses

  • Mushroom fruiting chambers
  • Monotub grow environments
  • Mushroom grow tents
  • Greenhouses and plant propagation
  • Automated humidification systems
  • Ecosphere growing systems
Pair this controller with a Digital Temperature Controller/Thermostat to automate both sides of your climate — humidity and heat — from the same setup.

Frequently Asked Questions

What humidity range can this controller maintain?

It's adjustable from 5% to 99% relative humidity, with ±0.1% RH sensor accuracy — wide enough to cover dry incubation setups through high-humidity fruiting chambers.

Will the probe hold up in a high-humidity fruiting chamber?

Yes. The probe is moisture-resistant and built specifically to perform reliably in the high-humidity conditions common to mushroom fruiting chambers and Ecosphere setups.

How do I set it up?

Plug your humidifier into the controller's outlet, place the probe in your grow space, and set your target range with the two-button controls. The controller cycles the humidifier on and off automatically to hold that range.

Is this controller safety certified?

Yes, it's ETL Listed, meeting UL safety standards for reliable operation.

Can I control temperature and humidity together?

This controller is dedicated to humidity. For temperature, pair it with our Digital Temperature Controller/Thermostat 1000W, which runs heat mats and other heating devices on its own independent probe and setpoint.