Introduction
The ThermoPro TP351S is a Bluetooth-enabled indoor thermometer and humidity monitor designed to provide accurate environmental readings and remote monitoring capabilities via a smartphone application. This device is ideal for various indoor environments such as homes, greenhouses, RVs, and more, offering features like real-time data, historical data storage, and customizable alerts.
Key Features
- Easy Bluetooth Connection: Features advanced auto-connection technology for effortless pairing with smart devices.
- Accurate Sensor: Equipped with an advanced NTC humidity sensor for high precision (±0.5°F and ±2% RH) and fast refresh rates (10-second).
- Extended Remote Range: Offers a remote range of up to 260 feet for monitoring from various locations within your home or office.
- 2-Year Data Storage & Export: Stores up to 2 years of historical data, which can be easily exported for analysis.
- Feature-Rich App: Provides temperature and humidity alerts, comfort index, online data chart tracking, and battery indicator.
- Compact & Portable Design: Small size with a hanging loop for versatile placement.
Package Contents
Please ensure all items are present in the package:
- 1 x ThermoPro TP351S Bluetooth Indoor Thermometer & Humidity Monitor
- 2 x AAA Batteries
- 1 x User Manual (Quick Start Guide)
Setup Guide
1. Install Batteries
Open the battery compartment on the back of the device. Insert the two AAA batteries, ensuring correct polarity (+/-). Close the battery compartment securely.

Image: The ThermoPro TP351S device shown alongside a smartphone displaying its companion application, illustrating the device's compact size and the app's user interface with temperature and humidity readings.

Image: A detailed view of the ThermoPro TP351S's internal sensor chip, highlighting its advanced NTC technology for accurate temperature and humidity measurements.
2. Download the ThermoPro APP
Search for "ThermoPro" in the Apple App Store (for iOS devices) or Google Play Store (for Android devices) and download the official application. Alternatively, scan the QR code provided in the quick start guide to directly access the app download page.
3. Pair the Device
Ensure Bluetooth is enabled on your smartphone. Open the ThermoPro app. The device should automatically connect. If not, follow the in-app instructions to add a new device. The TP351S features auto-connection technology for seamless pairing.

Image: An illustrative diagram demonstrating the 260-foot Bluetooth range of the ThermoPro TP351S, showing its ability to transmit data across multiple rooms and floors within a typical home environment.
Operating Instructions
Real-time Monitoring
Once connected, the ThermoPro app will display real-time temperature and humidity readings from your TP351S device. The readings refresh every 10 seconds, providing up-to-date environmental data.

Image: A smartphone screen displaying a temperature alert from the ThermoPro app, with the TP351S device placed on a bedside table in a child's room, indicating its use for monitoring comfort levels.
Data Storage and Export
The device stores up to 2 years of temperature and humidity data. You can view historical data charts (hourly, daily, weekly, monthly, yearly) within the app. To export data, navigate to the data export option in the app, which allows you to save the data for further analysis.

Image: A visual representation of the ThermoPro app's data export feature, showing data being transferred from a smartphone to a laptop, with the TP351S device positioned near an incubator, highlighting its utility for long-term environmental monitoring.
Setting Alerts
The app allows you to set custom high and low temperature and humidity alerts. You will receive notifications on your smartphone if the readings go outside your preset range.
Comfort Index
The app provides a comfort index (Dry, Comfort, Wet) based on the current humidity levels, helping you understand the environmental conditions at a glance.

Image: The ThermoPro app displaying the comfort indicator (Dry, Comfort, Wet) on a smartphone, with the TP351S device in a room where a person is performing yoga, illustrating its use for maintaining optimal indoor conditions.
Placement and Portability
The compact design and integrated hanging loop allow for flexible placement of the TP351S in various locations, including tabletops, hanging from hooks, or carried in bags.

Image: A composite image showing the compact dimensions of the ThermoPro TP351S and examples of its portability, including being held in a hand, hanging on a wall, and fitting into a small bag.

Image: A collage depicting the ThermoPro TP351S being used in diverse environments such as a greenhouse, a bedroom, and a cigar collection room, demonstrating its versatility for monitoring different spaces.
Maintenance
- Cleaning: Wipe the device with a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water.
- Battery Replacement: Replace batteries when the low battery indicator appears in the app. Use 2 AAA batteries.
- Storage: If storing for an extended period, remove the batteries to prevent leakage. Store in a cool, dry place.

Image: The ThermoPro TP351S device shown next to two AAA batteries, emphasizing its ultra-low power consumption and the type of batteries required for operation.
Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| Device not connecting to app. |
|
| Inaccurate readings. |
|
| App not receiving data updates. |
|
Specifications
| Feature | Detail |
|---|---|
| Model | TP351S |
| Brand | ThermoPro |
| Temperature Accuracy | ±0.5°F (±0.3°C) |
| Humidity Accuracy | ±2% RH |
| Temperature Range | -4°F to 140°F (-20°C to 60°C) |
| Humidity Range | 10% to 99% RH |
| Bluetooth Range | Up to 260 feet (79 meters) in open connection distance |
| Data Storage | Up to 2 years |
| Power Source | 2 x AAA batteries (included) |
| Dimensions | Approx. 3.07 x 2.72 x 0.75 inches (7.8 x 6.9 x 1.9 cm) |
| Item Weight | Approx. 1.76 ounces (50 grams) |
| Mounting Type | Tabletop / Hanging Loop |
Warranty Information
ThermoPro provides a limited one-year warranty on this product from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please refer to the official ThermoPro website or the quick start guide for detailed warranty terms and conditions, including information on how to register your product for an extended warranty if applicable.
Customer Support
For any questions, technical assistance, or warranty claims, please contact ThermoPro Customer Service. Contact information can typically be found on the ThermoPro official website or within the product packaging.
Website: www.buythermopro.com





