Product Introduction

Bubble water level meter HD-BU120 is a high-precision water level sensor. It adopts micro-piston pump as the blowing and pressure-inducing device, which converts the hydrostatic pressure at the underwater measuring point into the pressure value of the gas and leads it above the water surface through the measuring tube, and then senses and processes it with the pressure sensor, so as to realize the measurement of the water level. Since the pressure sensor measures the pressure of compressed air without contacting the measured liquid, the long-term stability is extremely high.

Bubble water level meter HD-BU120 has the characteristics of high accuracy, high reliability, high intelligence, free of air cylinder, free of logging, free of maintenance, anti-vibration, long life, especially suitable for flowing water bodies, large, medium and small rivers, reservoirs, or water pollution and corrosive industrial wastewater, etc. It is inconvenient to build logging wells or build a well expensive occasions, such as: water conservancy and hydrology, upstream and downstream of the dams, the sea, the groundwater level, petroleum, chemical industry, sewage treatment plants, urban drainage water The monitoring of the water level of petroleum, chemical industry, sewage treatment plant, urban drainage pumping station, and so on.

Functional characteristics

※ Non-contact measurement, high precision, good stability, easy maintenance;

※ Convenient installation, no need to build measurement wells, and not affected by floating objects on the water surface;

※ With zero-point automatic correction and manual correction function, can completely eliminate the zero drift error;

※ Wide voltage design, with reverse connection protection, over-voltage and over-current protection and lightning surge absorption capability;

※ Automatic cleaning function, to ensure that the air guide tube is smooth;

※ Cyclic storage of 5490 measurement records;

※ Modbus communication protocol is adopted, which is convenient for interfacing with various data acquisition devices.

Technical parameters

Range: 20m/30m/40m/50m optional
Resolution: 1mm
Measurement accuracy: ± 0.03% F.S
Long term stability: ≤ ± 0.1% F.S. per year
Maximum water level change rate: 1m/min
Measurement interval: 1-60 minutes can be set, with a default of 5 minutes
Power supply voltage: 9-28VDC
Output interface: RS485 MODBUS RTU protocol, 4-20mA analog output
Measurement tube specification: inner φ 4/Outer φ six
Measuring medium: water (river, lake, groundwater, etc.), special liquid can be customized
Working temperature: -20~65 ℃
Storage temperature: -40~80 ℃
Environmental humidity: less than 95%

Field Installation