The Manhole Water Level Monitoring Instrument is an intelligent, integrated device designed for accurate and long-term water level measurement in underground environments.
It adopts a low-power silicon piezoresistive hydrostatic pressure sensor with a stainless steel isolation diaphragm as the core measurement element. A high-precision A/D converter processes the collected pressure signal and performs zero-point and temperature compensation, ensuring reliable accuracy across a wide temperature range.

The instrument is powered by a high-capacity lithium-thionyl chloride battery pack, which is replaceable, long-lasting, and maintenance-free, making it ideal for use in remote locations or environments without external power supply.

Data are transmitted via 4G or NB-IoT wireless communication to a centralized management platform, enabling real-time monitoring, alarm handling, and statistical analysis of water level conditions.

This product is widely applicable in municipal drainage, environmental protection, sewage treatment, firefighting, petrochemical, power, gas, and emergency monitoring industries, offering a dependable solution for smart water monitoring and flood risk management.

2. Product Function

2.1 Real-Time Water Level Monitoring

The system performs continuous, pressure-based water level measurement within manholes, providing stable and accurate real-time data to support drainage network management and urban flood warning systems.

2.2 Multi-Level Alarm Mechanism

Equipped with a tiered alarm system, the instrument applies different data sampling and transmission intervals based on alert levels, ensuring timely response to changing on-site water conditions.

2.3 Data Storage and Breakpoint Resume

The system supports local data storage and automatic retransmission after network restoration, ensuring no data loss even under unstable communication conditions.

2.4 External Wake-Up Function

When in sleep mode, the device can be remotely or externally triggered to wake and immediately transmit data, allowing flexible control and energy efficiency.

2.5 Multiple Working Modes

Supports real-time monitoring and data querying, with configurable sampling frequency, collection intervals, and transmission cycles to adapt to diverse operating requirements.

2.6 Remote Configuration and OTA Upgrade

Allows remote configuration, Bluetooth setup, and Over-the-Air (OTA) firmware upgrades, simplifying field deployment and maintenance operations.

2.7 Self-Monitoring and Status Display

Features a large LCD display showing real-time water level, voltage, signal strength, transmission count, and other diagnostic parameters, enhancing on-site visibility and device management.

3. Installation instructions

3.1 Installation precautions

The instrument should be mounted using a wall-mounted bracket system inside a manhole.
Before installation, ensure all construction and safety protocols are observed. Select manholes with smooth, sturdy shaft walls to ensure stable sensor positioning and accurate measurement.
Avoid installation on irregular or uneven wall structures, as they may cause interference or deviation in water level readings.