The LSQ series ultrasonic open channel flowmeter is a new type of measuring instrument used for measuring the discharge of sewage from natural flow pipes (channels) in industrial and mining enterprises, abbreviated as "sewage flowmeter". It is widely used for measuring sewage discharge in industries such as petroleum, chemical, synthetic fiber, textile, pharmaceutical, etc. It is one of the necessary instruments for urban water pollution prevention and environmental protection departments to monitor pollutant emissions, and also an essential instrument for measuring agricultural irrigation water discharge in water conservancy departments in the future.

This flowmeter adopts technologies such as hydraulic flow measurement, ultrasonic positioning, microcomputer processing, digital display, and printing records. It can be installed and automatically measured in harsh environments, with high reliability and strong anti-interference ability. Easy installation and maintenance, easy to read.

Characteristics
The flow channel is made of fiberglass, and the thin-walled weir is made of stainless steel or other acid and alkali resistant materials, which have anti-corrosion properties
Non contact ultrasonic sensor for measuring liquid level
Automatic temperature tracking compensation
Automatic centennial calendar hard clock
Power loss memory function
Complete recording function
Standard signal output interface and RS232 communication interface

Main technical indicators

Working principle

The LSQ ultrasonic open channel flowmeter consists of a secondary instrument consisting of an air medium ultrasonic sensor, a temperature compensation sensor, a flow channel or thin-walled weir, and a microcomputer measurement system. When the measured medium passes through the flow channel (P or P-B channel) or the gap of the thin-walled weir to form a free flow, the relationship between its flow rate Q and the upstream water level H in the flow channel or thin-walled weir is Q=CHn (n, C is the coefficient).
Under the control of a microcomputer system, the air medium ultrasonic liquid level sensor emits and receives ultrasonic waves. The microcomputer calculates the liquid level height by measuring the time difference between the emitted wave and the echo, and then through a series of judgments, calculations, and conversion processing, the flow rate Q flowing through the tank or thin-walled weir can be obtained.

Model selection and description
LSQY series

External dimensions
Thin walled weir


Note: Y in the model indicates that the flowmeter uses a thin-walled weir

LSQP series



Note: The P in the model indicates that the flowmeter uses a P slot

P slot

Note: The secondary instruments equipped with the above tanks or weirs are: desktop: external dimensions length x height x width, mm: 340 x 320 x 120.
The signal line is generally equipped with 30-40 meters. If it is larger than 60 meters, an order description is required, but it cannot exceed 100 meters.