Product Overview
The ThermoPro TP260B is a professional-grade indoor/outdoor thermometer and hygrometer designed for accurate and reliable monitoring of temperature and humidity. Featuring a market-leading 1000ft/300m wireless range, it allows you to monitor conditions in multiple locations around your home or property. The main unit displays both indoor and outdoor readings, including trend arrows and 24-hour high/low records. Its easy-to-read backlit display and touch buttons ensure user-friendly operation. The remote sensor is weatherproof and cold-resistant, making it suitable for various outdoor environments.

Figure 1: ThermoPro TP260B Main Unit and Remote Sensor
Package Contents
- 1 x Main Thermometer Unit
- 1 x Remote Temperature Sensor
- 4 x AAA Size Batteries (included)
- 1 x User Manual
Key Components and Display

Figure 2: Detailed view of the main unit's display and touch buttons.
The main unit features a large, clear LCD display with distinct sections for indoor and outdoor readings. Key indicators include:
- OUT: Outdoor temperature and humidity.
- IN: Indoor temperature and humidity.
- CH1/2/3: Indicates the channel of the remote sensor being displayed.
- MAX/MIN: Displays the highest and lowest recorded temperature/humidity over the last 24 hours.
- Trend Arrows: Shows whether temperature/humidity is rising, falling, or remaining stable.
- Low Battery Indicator: Alerts when batteries need replacement.
- °F/°C Button: Toggles between Fahrenheit and Celsius.
- CH/SYNC Button: Used for channel selection and sensor synchronization.
- Light Touch Button: Activates the display backlight for improved visibility in low light.
- MAX/MIN/CLEAR Button: Toggles between Max/Min readings and clears recorded data.
Setup
1. Battery Installation
- Main Unit: Open the battery compartment on the back of the main unit. Insert 2 x AAA batteries, ensuring correct polarity (+/-). Close the compartment.
- Remote Sensor: Open the battery compartment on the back of the remote sensor. Insert 2 x AAA batteries, ensuring correct polarity (+/-). Close the compartment.
2. Synchronization
The main unit and remote sensor should automatically synchronize once batteries are installed. If synchronization fails or you are adding additional sensors, follow these steps:
- Place the main unit and remote sensor close to each other.
- Press and hold the CH/SYNC button on the main unit for 3 seconds. The display will flash, indicating it is searching for the sensor.
- Press the RESET button on the back of the remote sensor.
- The main unit should display the remote sensor's readings within a few minutes.
Note: The ThermoPro TP260B supports up to 3 remote sensors (sold separately). To add more sensors, repeat the synchronization process for each additional sensor, selecting a different channel (CH1, CH2, or CH3) on the main unit using the CH/SYNC button.

Figure 3: The main unit can connect with up to three remote sensors.
3. Placement Options
The main unit offers versatile placement options:
- Tabletop Stand: Use the integrated fold-out stand for desktop or shelf placement.
- Wall Mount: Utilize the hanging hole on the back to mount it on a wall.
- Built-in Magnet: Attach the unit to any metallic surface, such as a refrigerator.
For the remote sensor, choose a location that provides accurate readings and is within the 1000ft wireless range. Avoid direct sunlight or areas with extreme temperature fluctuations. The sensor is weatherproof, but placing it under an overhang or in a sheltered spot can prolong its lifespan.

Figure 4: Various placement options for the main unit.
Operating Instructions
1. Switching Temperature Units (°F/°C)
Press the °F/°C button on the front of the main unit to toggle between Fahrenheit and Celsius temperature displays.
2. Activating Backlight
Touch the Light button (light bulb icon) on the front of the main unit to activate the backlight for 15 seconds, improving readability in dark conditions.

Figure 5: The LCD screen features a backlight for easy reading.
3. Viewing and Clearing MAX/MIN Records
Press the MAX/MIN/CLEAR button once to view the maximum temperature and humidity recorded since the last reset. Press it again to view the minimum records. To clear the 24-hour high/low records, press and hold the MAX/MIN/CLEAR button for 3 seconds.
4. Monitoring Multiple Channels
If you have multiple remote sensors, press the CH/SYNC button repeatedly to cycle through the channels (CH1, CH2, CH3) and view the readings from each sensor. The main unit will automatically scroll through all active channels every few seconds.
Maintenance
1. Battery Replacement
When the low battery indicator appears on the display, replace the batteries in the respective unit (main unit or remote sensor) with new AAA batteries. Ensure correct polarity.
Important Note: If you only replace the remote sensor battery, please press and hold the CH/SYNC button of the receiver for 3 seconds to re-register, or by reinstalling the battery of the receiver within 3 minutes and then they will automatically resynchronize the data.
2. Cleaning and Storage
Clean the unit and sensor with a soft, damp cloth. Do not immerse in water or use abrasive cleaners. Store the device in a dry place away from extreme temperatures when not in use for extended periods.

Figure 6: The remote sensor is designed to withstand various weather conditions.
Troubleshooting
- No readings on display or "---" shown:
- Check if batteries are installed correctly with proper polarity.
- Replace old batteries with new ones.
- Ensure the main unit and sensor are within the 1000ft wireless range and free from major obstructions.
- Perform a manual synchronization as described in the "Setup" section.
- Inaccurate readings:
- Ensure the sensor is not placed in direct sunlight, near heat sources, or in areas with poor air circulation.
- Allow the units to stabilize for at least 30 minutes after setup for accurate readings.
- The 1000-ft range may be affected by obstructions in your home layout (including walls, router, trees, and bushes as well as building materials such as metal and glass). Try relocating the sensor or main unit.
- Display is dim or flickering:
- Replace the batteries in the main unit.
Specifications
| Feature | Detail |
|---|---|
| Brand | ThermoPro |
| Model Name | TP260B |
| Connectivity Technology | 915 MHz Wireless |
| Wireless Range | Up to 1000ft / 300m (without obstructions) |
| Temperature Accuracy | +/-0.5°F |
| Humidity Accuracy | +/-2-3% RH |
| Power Source (Main Unit) | 2 x AAA Batteries |
| Power Source (Remote Sensor) | 2 x AAA Batteries |
| Outdoor Sensor Resistance | Weatherproof, Cold-resistant (-4°F/-20°C) |
| Display Type | Active Matrix LCD with Backlight |
| Placement Options | Tabletop, Wall Mount, Magnet |
Warranty and Support
ThermoPro products come with a warranty. For detailed warranty information, product registration, or technical support, please visit the official ThermoPro website or refer to the contact information provided in your product packaging.
You can also download the full user manual in PDF format here: ThermoPro TP260B User Manual (PDF)





