WP-LR series of Internet of Things liquid level collector
The LR series liquid level collector is a smart meter based on NB-IoT wireless communication technology. It mainly completes the detection of liquid level in municipal administration, water affairs, rivers, rivers, lakes, and road inspection wells, and uploads the collected liquid level data and other information to the cloud data platform through the wireless communication network. The shape design of this liquid level collector can meet the requirements of harsh application environment, anti-vandalism and IP68. It can not only meet the performance and function requirements of industrial-grade equipment, but also can effectively adapt to the use in the field, remote areas and harsh environments. Through the construction of liquid level detection and information system in municipal, water, river, river, lake, and road silo wells, a safety early warning platform will be built to improve emergency command and rapid disposal capabilities, and ensure the protection of urban water systems, rivers, lakes, and underground pipe networks safe operation. The detected liquid level value is transmitted to the cloud server, and the cloud service platform is accessed in the monitoring center to monitor the liquid level in real time, so as to realize the automatic alarm and early warning of the system; make the safe operation of the entire urban water system, rivers, lakes, and road pipe networks possible. Be sure, controllable, and predictable.
The working principle of the liquid level collector is composed of a sensor and a signal processing circuit. Among them, the pressure sensing surface of the sensor is equipped with a Wheatstone bridge. When the pressure is increased, the resistance value of each bridge arm of the bridge changes. Through the signal processing circuit, it is converted into a voltage change. The night position collector uses a low-power single-chip microcomputer to read the liquid level data collected by the liquid level collector through the interface; use Flash to realize the local storage of liquid level data and terminal device parameter information; follow the communication protocol (protocol) with the cloud service platform , The main processing chip modulates the data to be reported in accordance with the protocol format of the protocol, and periodically reports the collected data to the cloud server. At the same time, the cloud server can issue instructions to the liquid level collection terminal and modify the sampling sending time.
• Use place: liquid level detection of municipal administration, water affairs, rivers, rivers, lakes, and underground manholes
• Sensor: MEMS monocrystalline silicon liquid level sensor
• Range: 0 ~ 10m (other ranges can be customized)
• Start-up time: <10s
• Housing: 304 stainless steel
• Protection level: IP68
• Explosion-proof grade: intrinsically safe explosion-proof
• Transmission: using NB-IoT communication module, wireless remote transmission
• Power supply: use high-performance lithium 3.6V battery power supply, capacity 19×3Ah
• Working temperature: -10 ～ 70℃
• Measurement accuracy: ±0.5%
• Repeatability: <±0.25%
The liquid level collector is mainly composed of liquid level measuring probe and circuit host. The circuit part is installed in the stainless steel shell and is connected to the liquid level measuring probe part through a cable.
• Normal reporting time: 12 hours (default time, can be changed)
• Higher than the warning line reporting time: 10 minutes
• Less than the warning line reporting time: 12 hours
• Warning limit: 5m (factory setting, can be changed)
The collected data is reported every 12 hours. The time interval for reporting the collected data can be configured by the command issued by the platform. The configuration time interval ranges from 5 minutes to 9999 hours.
The warning line value can be sent to the collection terminal through the upper platform. When the liquid level is higher than the warning line value, the terminal will directly send the current value to the platform.
Note: The battery life is calculated by sending data twice a day, and it can work for more than 3 years. Avoid working in high temperature and low temperature conditions and frequent data collection and sending, shorten battery life.
Selection and measurement range