1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your SENSTREE Dual Probe Temperature & Humidity Controller, Model THT1032-ZJ. This device is designed to precisely monitor and control both temperature and humidity in various environments, utilizing independent sensors for optimal performance. Please read this manual thoroughly before use to ensure safe and efficient operation.
2. Safety Information
Observe the following safety precautions to prevent injury or damage to the device:
- Ensure the power supply voltage matches the device's specifications (240 Volts AC).
- Do not immerse the controller unit in water or expose it to excessive moisture. The probes are water-resistant, but the main unit is not.
- Avoid exceeding the maximum rated current of 10 Amps per outlet. Overloading can cause damage or fire.
- Keep the device out of reach of children.
- Do not attempt to disassemble or repair the unit yourself. Contact qualified personnel for service.
- Ensure proper ventilation around the controller to prevent overheating.
3. Product Overview
3.1 Components
The SENSTREE Dual Probe Temperature & Humidity Controller consists of the main control unit, a temperature probe, and a humidity probe.

Figure 1: Main unit of the SENSTREE Dual Probe Temperature & Humidity Controller, showing the display, control buttons, three power outlets, and connected temperature and humidity probes.
3.2 Key Features
- Dual-Probe Design: Features separate temperature and humidity sensors for independent, precise monitoring and control.
- Dual Display: Clear LCD screen simultaneously shows real-time temperature (°F/°C) and humidity (%).
- Wide Application: Suitable for greenhouses, reptile terrariums, grow tents, wine cellars, and storage rooms. Compatible with humidifiers, dehumidifiers, heaters, AC units, and fans.
- Precision Engineering: High-accuracy sensors and advanced calibration ensure reliable performance. Alerts for out-of-range conditions protect sensitive environments.
- User-Friendly: Simple setup and intuitive buttons for setting desired ranges and automatic device activation.
4. Setup
4.1 Unpacking
Carefully remove the controller and its components from the packaging. Verify that all parts are present and undamaged.
4.2 Mounting the Controller
The controller features a hanging design for convenient placement.

Figure 2: The back of the controller unit features keyhole slots for wall mounting using screws (not included).
- Select a suitable location for the controller, ensuring it is away from direct heat sources, moisture, and vibrations.
- Use appropriate screws (not supplied) to secure the controller to a wall or vertical surface using the keyhole slots on the back.
4.3 Connecting Probes
The controller comes with two independent probes: one for temperature and one for humidity.

Figure 3: The separate temperature probe (left) and humidity probe (right) for precise environmental measurements.
- Plug the temperature probe into the designated port on the controller.
- Plug the humidity probe into its designated port.
- Position the probes in the area where you need to monitor temperature and humidity. Ensure they are not obstructed and are representative of the environment you wish to control. The sensor length is approximately 1.4 meters (55.12 inches).
4.4 Powering On
- Plug the controller's power cord into a standard 240V AC electrical outlet.
- The LCD display will illuminate, showing current temperature and humidity readings.
5. Operating Instructions
5.1 Display Overview
The LCD screen provides real-time information and settings.

Figure 4: The controller's backlit LCD display showing temperature (OUT1), humidity (OUT2), and a clock/timer (OUT3).
- OUT1: Displays current temperature and heating/cooling status.
- OUT2: Displays current humidity and humidification/dehumidification status.
- OUT3: Displays current time or timer status.
5.2 Setting Temperature and Humidity
To set your desired temperature and humidity ranges:
- Press the SET button once to enter temperature setting mode. The temperature display will flash.
- Use the UP and DOWN arrow buttons to adjust the desired temperature set point.
- Press SET again to confirm the temperature and move to the temperature differential setting (hysteresis). Adjust as needed.
- Press SET a third time to enter humidity setting mode. The humidity display will flash.
- Use the UP and DOWN arrow buttons to adjust the desired humidity set point.
- Press SET a fourth time to confirm the humidity and move to the humidity differential setting. Adjust as needed.
- Press SET one last time or wait a few seconds for the settings to save automatically and return to normal display.
5.3 Mode Selection
The controller supports various operating modes for temperature and humidity control.
- Press and hold the MODE button for 3 seconds to enter mode selection.
- Use the UP and DOWN arrow buttons to cycle through available modes (e.g., Heating, Cooling, Humidification, Dehumidification, Timer).
- Press MODE again to confirm your selection.
5.4 Timer Function
The OUT3 port can be configured as a timer. Refer to the detailed instructions in the full manual for specific timer programming steps.
6. Maintenance
To ensure the longevity and accuracy of your controller:
- Cleaning: Wipe the main unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Probe Care: Keep the probes clean and free from debris. Avoid bending or damaging the probe cables.
- Storage: If storing the device for an extended period, disconnect it from power and store it in a dry, cool place.
7. Troubleshooting
Refer to the table below for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power; power cord loose | Check power connection; ensure outlet is functional. |
| Inaccurate readings | Probes dirty or damaged; incorrect placement | Clean probes; reposition probes away from drafts or direct heat/moisture; check for physical damage. |
| Connected device not activating | Incorrect set points; device not plugged in; controller in wrong mode | Verify set points and differential; ensure device is properly plugged into the correct outlet; check operating mode. |
| Error message on display | Probe malfunction; internal error | Disconnect and reconnect probes; power cycle the unit. If the error persists, contact customer support. |
8. Specifications
Technical specifications for the SENSTREE Dual Probe Temperature & Humidity Controller:
| Feature | Specification |
|---|---|
| Model Number | THT1032-ZJ |
| Voltage | 240 Volts (AC) |
| Rated Current | 15A max (per plug, check product label for exact rating) |
| Temperature Control Range | -10°C to 120°C / 14°F to 248°F |
| Humidity Control Range | 5-99% RH |
| Display Type | LCD |
| Probe Length | Approximately 1.4 meters (55.12 inches) |
| Item Weight | 1.08 pounds |
| Package Dimensions | 6.65 x 6.3 x 2.05 inches |
9. Warranty and Support
The SENSTREE Dual Probe Temperature & Humidity Controller comes with a 12-month warranty from the date of purchase, covering manufacturing defects. This warranty does not cover damage caused by misuse, accident, unauthorized modification, or improper installation.
For technical support, troubleshooting assistance, or warranty claims, please contact SENSTREE customer service through the retailer where the product was purchased or visit the official SENSTREE website for contact information.