Take total control of your environment with the STC-3028 Dual Controller (STS High-Humidity Mod). While standard factory controllers use exposed sensors that “drown” and freeze at 92.9% RH, every STS unit is custom-upgraded before dispatch with our AHT30-F modification.

We open the sensor probe and apply a professional-grade 0.25µm ePTFE (expanded Teflon) hydrophobic membrane directly over the high-precision digital AHT30 chip. This creates an absolute physical barrier that blocks liquid mist from ultrasonic humidifiers while remaining 100% permeable to water vapor, ensuring real-time, continuous tracking up to 99% RH without freezing, failing, or drifting.

Key Features

• 🌡️ Dual Relay Control: Independently manage heating/cooling and humidifying/dehumidifying devices (10A max per channel).
• 💧 Upgraded AHT30-F Sensor: Shielded with a 0.25µm ePTFE membrane. Handles continuous 90% to 99% RH with no “condensation lockup.”
• 🔌 220V AC Compatibility: Ready to wire directly into standard South African power setups.
• 📟 Clear LCD Display: Dual display showing real-time temperature and humidity readings simultaneously.
• 🧠 Power-Loss Memory: Saves your settings automatically during load shedding or power cuts.

Applications

• Mushroom Cultivation: Perfect for high-humidity fruiting chambers and incubation setups.
• Hydroponics & Greenhouses: Reliable climate control for propagation tents and growing rooms.
• Reptile Enclosures: Maintain highly precise humidity zones safely.

Technical Specifications

What’s Included

• 1x STC-3028 Controller Unit
• 1x STS-Modified AHT30-F High-Humidity Sensor Probe (ePTFE Membrane Protected)
• 1x Set of Mounting Clip Accessories

Note: The upgraded sensor probe is fully water-resistant and protected against high humidity, but the main STC-3028 controller unit itself is not waterproof. Always mount the display unit safely outside your high-humidity grow tent or chamber.

STC-3028 Mounting & Installation

The STC-3028 is designed for clean, embedded panel mounting into control boxes, incubators, or grow room walls.

Step 1: Create the Panel Cut-out

• Cutout Dimensions: 71 mm wide x 29 mm high.
• Front Bezel Dimensions: The front face of the controller is slightly larger (75 mm x 34.5 mm) to cleanly overlap and hide the cutout edges.

Step 2: Mount and Secure

1. Push the STC-3028 housing directly into your panel cutout from the front side.
2. Slide the included orange plastic mounting clips along the sides of the chassis from the back until the unit is locked firmly flush against the panel.

Step 3: Electrical Connections

Safety Warning: Always disconnect power before doing any wiring work to prevent shock.

1. Power Supply: Connect your 220V AC mains line to terminals 1 and 2.
2. Sensor Probe: Connect the 4-wire sensor connector to its dedicated terminals on the back.
3. Relay Outputs: Terminals 3 & 4 control your Temperature device (Heater/Cooler), and terminals 5 & 6 control your Humidity device (Humidifier/Extractor).