Product Overview
The HMC Smart Manhole Cover Monitoring Device is an independently developed product designed for smart city infrastructure management, used to monitor the real-time status of manhole covers.The device is installed on the underside of the manhole cover. When abnormal displacement exceeds the preset alarm threshold, or when flooding or overflow occurs, the device triggers an alarm and transmits the manhole cover status and device data to the monitoring center via wireless communication. The control center then analyzes the data and determines the corresponding alert status.This product is widely used in smart city construction and urban infrastructure management.
Product Features & Advantages
- Multi-State Monitoring :Integrated tilt, displacement, and vibration sensors enable real-time monitoring of manhole cover status, including opening/closing, tilting, abnormal lifting, or impact events. Data is synchronized to the management platform. When abnormalities are detected (e.g., unauthorized opening or displacement), the device immediately triggers on-site audio/visual alarms as well as platform alerts.
- Smart Communication & Remote Control: Equipped with low-power 4G/LoRa communication modules, supporting remote monitoring of operational data and remote locking/unlocking of manhole covers (requires compatible locking system).
- Precise Positioning:Integrated GPS / BeiDou positioning system for fast identification of fault locations or missing manhole covers.
- Durable Design:High-strength composite housing (helmet-grade material), impact-resistant and corrosion-resistant, with IP67 or higher protection, suitable for complex urban environments.
- Smart Operation & Predictive Maintenance:Includes low battery alerts and self-diagnostic functions with automatic maintenance reporting. It replaces manual inspection, improves urban manhole monitoring efficiency by over 60%, and reduces labor costs.
- Flexible Expansion:Supports integration of additional sensors such as water level, gas (CH₄), temperature, and humidity. Suitable for drainage, gas, power, and telecom systems, and helps predict risks such as pipeline leakage and flooding.
Technical Specifications
| Item | Basic Version | Standard Version | Advanced Version |
| Monitoring Functions | Tilt/Displacement + Flooding | Tilt/Displacement + Flooding + Water Level | Tilt/Displacement + Flooding + Water Level + Methane (CH₄) Gas |
| Communication Method | 4G + Bluetooth | 4G + Bluetooth | 4G + Bluetooth |
| Battery Life | 6 years (under stable signal conditions) | 6 years (under stable signal conditions) | 6 years (under stable signal conditions) |
| Response Time | < 10 seconds | < 10 seconds | < 10 seconds |
| Battery Capacity | 19,000 mAh | 19,000 mAh | 19,000 mAh |
| Operating Temperature | -30°C ~ 75°C | -30°C ~ 75°C | -30°C ~ 75°C |
| Housing Material | ABS plastic (helmet-grade) | ABS plastic (helmet-grade) | ABS plastic (helmet-grade) |
| Dimensions | 142 × 105 × 63 mm | 142 × 105 × 63 mm | 142 × 105 × 63 mm |
| Installation Location | Rear side of manhole cover | Rear side of manhole cover | Rear side of manhole cover |
| Protection Rating | IP67 / IP68 | IP67 / IP68 | IP67 / IP68 |
| Mechanical Lock | Optional (requires full manhole cover integration) | Optional (requires full manhole cover integration) | Optional (requires full manhole co |
Main Applications
