MERCURY - Smart Water Monitoring Systems Manufacturer

1. Product introductions

SR2502 bubble water level meter is a high-precision water level sensor independently researched, developed and produced by KOHO. It adopts micro-piston pump as blowing and pressure-inducing device, which converts the hydrostatic pressure at the underwater measuring point into the pressure value of 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 water level. Since the pressure sensor measures the pressure of compressed air without contacting the measured liquid, the long-term stability is extremely high.

It with high accuracy, high reliability, high intelligence, free of gas cylinders, free of logging, maintenance-free, vibration resistance, long service life, especially suitable for flowing water, large, medium and small rivers, reservoirs, or water pollution and corrosive industrial wastewater and other water bodies, such as serious pollution and corrosive industrial wastewater and other occasions inconvenient to build logging wells or build wells are expensive, such as: water conservancy and hydrology, upstream and downstream of dams, the ocean, groundwater levels, petroleum, Chemical industry, sewage treatment plants, urban drainage pumping stations and other monitoring.

1. Non-contact measurement, high precision, good stability, easy maintenance;
2. Easy to install, no need to build a logging well, and unaffected by floating objects on the water surface;
3. With zero auto-calibration function, zero drift error can be completely eliminated;
4. The influence of liquid specific gravity by temperature change can be effectively compensated by an external temperature sensor;
5. With analog output and digital communication interface for user convenience;
6. Wide voltage design with reverse connection protection, over-voltage and over-current protection and lightning surge absorption;
7. Equipped with LCD display and input keyboard, visualizing the instant water level, flexible operation;
8. The automatic cleaning function ensures that the air guide tube is free of obstruction;
9. Cyclic storage of 10,000 measurement records;
10. Adopting Modbus communication protocol, it is convenient to interface with various data collection devices.

No.	Item name	Parameter
1	Supply voltage	10～ 30VDC
2	Standby current	≤3.5mA
3	Average current:	≤10mA (measurement interval 1 minute, RS485 or SDI-12 output)
4	Measurement range	20m/30m/40m/50m/60m (optional)
5	Measurement accuracy	±0.03% F.S.
6	Resolution	1mm
7	Long-term stability	≤±0.1% F.S./year
8	Maximum water level change rate	1m/min
9	Measurement interval	1 minute to 24 hours can be set, default 5 minutes
10	Communication interface	RS 485 or SDI-12
11	Analog output	4～ 20mA
12	Measuring tube specification	Inner φ3/outer φ8
13	Temperature sensor	NTC 103 (optional)
14	Measuring medium	water (rivers,stream,lakes,groundwater,etc.), special liquids can be customized
15	Operating temperature	-20～ 80℃
16	Storage temperature	-40～ 80℃
17	Ambient humidity	＜95%

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