1. Introduction
The Zemismart Tuya Zigbee Ultrasonic Heat Meter is a smart device designed for accurate measurement of heat quantity in various heating systems. It utilizes imported precision electronic components to ensure high measurement accuracy, low power consumption, and good stability. This device integrates with the Tuya smart home ecosystem via Zigbee, allowing users to monitor heat consumption data through a mobile application and receive threshold alarms.
It is suitable for residential, commercial, and industrial applications, including district heating systems, thermal energy billing for building complexes, and heating/cooling charge collection for central air conditioning systems. This enables fair billing, efficient energy management, and energy conservation.
Key Features:
- Heat Quantity Measurement
- Data Display (on device and via app)
- Threshold Alarm notifications
- Waterproof design (IP67 Protection Class)
- Tuya Zigbee connectivity (requires Tuya Zigbee Hub)
2. Specifications
Below are the technical specifications and product parameters for the Ultrasonic Heat Meter.
| Feature | Specification |
|---|---|
| Measurement Accuracy | Class 2 |
| Pressure Loss | ≤0.02Mpa |
| Connection | Threaded Connection |
| Maximum Working Pressure (MWP) | 1.6Mpa |
| Flow Measuring Range | 1:100 |
| Temperature Sensor | 1.5m standard a pair of PT1000 Temperature Sensor (Length can be customized) |
| Data Storage | Continuous store of 18 months record |
| Power-off Protection | Saves all records before power loss; recovers measurement function automatically upon power return. |
| Communication Protocol | Tuya Zigbee |
| Data Transmission | Each 24h as default |
| Power Supply | 3.6VDC Lithium battery |
| Protection Class | IP67 |
| Environmental Class | Class A |
| Temperature Range | (5-95)℃ |
| Temperature Difference | (3-90)K |
| Installation Way | Inlet or return water (default is inlet installation) |
| Installation Position | Horizontal / Vertical |
| Permanence | Service cycle ≥6 years |
| Display | 8-bit LCD display |
| Anti-magnetic Disturbance | Unaffected by magnetic field interference up to 100 kA/m. |
3. Installation
Attention: Installation should be performed by trained personnel. The thermal cycle system must be a mechanical forced circulation system, as natural heat circulation cannot satisfy the pressure loss requirements of the heat meter.
- The heat meter must be installed in a dry, accessible location.
- Use professional installation tools for proper installation.
- The heat meter can be installed in either the inflow pipe or the return flow pipe. By default, it is factory-installed for the inflow pipe. If installation on the return pipe is required, this must be specified before production.
- When installing, ensure the flow direction of the medium matches the arrow indicated on the heat meter's pipe body.
- Special Note: Regardless of whether the heat meter is installed on the inflow or return flow pipe, the temperature sensor must be connected correctly. The red-labeled sensor is for the inflow pipe, and the blue-labeled sensor is for the return pipe.
Installation Position Guidelines:
- Correct Positions:
- M-1: Horizontal installation.
- M-2: Vertical installation.
- Incorrect Positions:
- M-3: Easy to accumulate bubbles, affecting measurement accuracy.
- M-4: Although vertical installation, there is no back pressure behind the meter, which may cause the fluid to not be completely full of pipes, affecting measurement accuracy.
4. Initial Setup & App Pairing
This device requires a Tuya Zigbee Hub to function properly and connect to the Tuya APP. The Tuya Zigbee Hub is not included with the heat meter.
4.1. Entering Pairing Mode on the Heat Meter:
Follow the display sequence below by using short presses (blue arrow) and long presses (red arrow) on the meter's button to navigate through the menu and enter pairing mode:
- HEAT (Initial display)
- Short press to 888.8.8.8.8.8
- Short press to COOL
- Short press to 0.000
- Short press to Flowrate
- Short press to 3855.59
- Short press to SUM
- Short press to 0.00
- Short press to F-Temp
- Short press to 26.09
- Short press to R-Temp
- Short press to 24.72
- Short press to ΔT
- Short press to 02.37
- Short press to 21-01-07 (Date)
- Short press to 00000002 SN (Serial Number)
- Short press to 23h
- Short press to [ At ]
- Short press to At254 00
- Short press to ConF19
- Short press to At254 00 (This indicates pairing mode is active)
4.2. Pairing with Tuya APP:
- Ensure your Tuya Zigbee Hub is powered on and connected to the internet.
- Open the Tuya Smart or Smart Life APP on your smartphone.
- Navigate to your Tuya Zigbee hub page within the app.
- Tap the "+" button (Add subdevice) at the bottom of the screen.
- When prompted, click on "LED already blink" (confirming the heat meter is in pairing mode).
- The app will automatically search for and add the device.
- Once detected, follow the on-screen prompts to complete the pairing process.
5. Operation
5.1. Data Display on the Meter:
The ultrasonic heat meter features an 8-bit LCD display that shows various measurement data. You can cycle through different data points by short-pressing the button on the device.
| Indicator | Description |
|---|---|
| HEAT | Heat measure |
| COOL | Cool measure |
| F-Temp | Incoming water temperature |
| R-Temp | Return water temperature |
| ΔT | Temperature difference between income and return |
| °C m³/h | Energy unit |
| MkW·h | Energy unit |
| Gcal | Energy unit |
| GAL | Energy unit |
| TEST | Test mode |
| SN | Serial number |
| Flow | Flow amount |
| Flowrate | Current flowrate |
| SUM | Summary water amount |
5.2. Heat Quantity Measurement via Tuya APP:
Once paired with the Tuya APP, you can access detailed heat consumption data and analysis.
The Tuya application allows you to check the heating flow, temperature, pipe pressure, and other relevant data. Key data points available in the app include:
- Total flow (m³)
- Water use this month (m³)
- Cumulative heating (kW·h)
- Daily consumption
- Heat metering status
- Alarm records
5.3. Threshold Alarms:
The heat meter is equipped with a threshold alarm feature. When an anomaly occurs, such as an empty pipe, the device proactively reports this information. The Tuya app will automatically push a notification to your smartphone, allowing for timely action and safety protection.
6. Maintenance
- Cleaning: Wipe the exterior of the heat meter with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: The device is powered by a 3.6VDC Lithium battery with a service cycle of ≥6 years. When the battery level is low, consult a professional for replacement to ensure proper sealing and IP67 protection.
- Inspection: Periodically check for any visible damage to the meter, connections, or temperature sensors. Ensure all connections are secure.
- Software Updates: Keep your Tuya Smart or Smart Life app updated to the latest version to ensure optimal performance and access to new features.
- Environmental Conditions: Ensure the installation environment remains dry and within the specified temperature range (5-95℃) to prevent damage.
7. Troubleshooting
Common Issues and Solutions:
- No Display/Device Not Powering On:
- Check the battery level. If the battery is depleted, professional replacement is required.
- Inaccurate Readings:
- Verify that the heat meter is installed in a correct position (horizontal or vertical, not M-3 or M-4 as per installation diagram) to avoid air bubbles or insufficient back pressure.
- Ensure the temperature sensors (red for inflow, blue for return) are correctly connected.
- Confirm that the thermal cycle system is a mechanical forced circulation system.
- Cannot Connect to Tuya APP:
- Ensure you have a Tuya Zigbee Hub and it is properly connected to your network.
- Verify the heat meter is in pairing mode (displaying "At254 00" after cycling through the menu).
- Check the distance between the heat meter and the Zigbee hub; reduce interference if possible.
- Restart the Tuya Zigbee Hub and try the pairing process again.
- No Alarm Notifications:
- Ensure the Tuya app has notification permissions enabled on your smartphone.
- Check the app's settings for alarm configurations.
- Verify the device is properly connected to the Tuya Zigbee Hub and has a stable connection.
8. User Tips
- Regular Monitoring: Utilize the Tuya app to regularly monitor your heat consumption patterns (daily, monthly, yearly) to identify potential inefficiencies or unusual usage.
- Optimal Placement: While the meter can be installed horizontally or vertically, ensure the chosen spot is easily accessible for visual checks and maintenance.
- Zigbee Network Stability: For reliable data transmission and alarm notifications, ensure your Tuya Zigbee Hub is centrally located and has a strong, stable connection to the heat meter and your home network.
9. Warranty & Support
For any technical assistance, warranty claims, or support inquiries, please contact Zemismart directly.
Contact Information:
- WhatsApp: +86 15580043427
- Email: 2589659452@qq.com
ZEMISMART is committed to providing professional, comprehensive smart home solutions and high-quality smart devices. As one of the earliest members of the CSA Alliance, ZEMISMART offers a wide range of MATTER-certificated products, ensuring seamless cross-platform connectivity.
