SER-YW
External mounted liquid level gauge

外贴式液位计

Product Overview

External mounted level gauge (hereinafter referred to as level gauge) is an intelligent explosion-proof instrument developed by our company that uses sonar ranging principle to measure the liquid level inside a sealed container from the outside. This product breaks the traditional measurement and installation method of liquid level gauges, achieving true non-contact measurement of liquid level in closed containers without opening holes. The sonar sensor (probe) is externally mounted on the bottom of the outer side of the container, without the need for hot work on the tested container and without affecting production. Truly achieved non-stop production and no hot work installation. It can accurately measure the liquid level of various flammable, explosive, toxic and other major hazardous media in high-temperature, high-pressure and sealed containers.

Technical features

Non contact measurement is safer 
When measuring liquids that are toxic, corrosive, pressurized, flammable, explosive, volatile, and prone to leakage, there is no need to use valves, connecting pipes, or joints. There are no leakage points, and the liquid and gas inside the tank do not come into contact, making it very safe. Even in the event of instrument malfunction or maintenance, there is no possibility of leakage, poisoning, or explosion. 
Installation and debugging without production stoppage or hot work 
Do not use hot work or clean the tank during installation and maintenance, which does not affect production. 
Easy installation and debugging 
The external liquid level gauge is highly intelligent, and the instrument is easy to install and debug on site. 
Two wire system 
Innovatively developed a two-line external mounted liquid level gauge with ultra-low power consumption, strong signal processing and anti-interference capabilities. Especially in renovation projects, it can save users a lot of material and labor costs, and make installation and maintenance more convenient. 
Small blind spots, no blind spots 
The sensor measurement process automatically adjusts the output power of the transmitter and the intelligent algorithm adapted to the current working conditions based on changes in the material level, which can achieve small measurement blind spots or even no blind spot measurements. 
Relay output 
The transmitter is equipped with a relay output, which can achieve single or multi-point alarm output. 
Self calibration, fault self diagnosis 
The external liquid level gauge has an automatic calibration function, which can perform self calibration during long-term operation, improving measurement accuracy and equipment stability. Diagnose the working status and hardware of the instrument, output the cause of the fault, increase the reliability of the external liquid level gauge, and reduce the workload of maintenance personnel. 
temperature compensation 
Temperature has a certain impact on the propagation speed of ultrasound in liquid, and the temperature compensation function can correct the propagation speed of ultrasound in liquid to achieve the most accurate measurement effect. 
Infrared debugging 
Easy to debug, especially suitable for explosion-proof situations, equipment debugging can be easily completed without opening the cover. 
High precision, anti-interference 
Through the analysis and summary of a large amount of on-site actual working condition data, the automatic calibration function and clutter suppression function developed by Sheng'er, combined with sensor temperature calibration, can make liquid level measurement and calibration an intelligent system, maintaining the highest measurement accuracy and stable anti-interference ability of the instrument. 
Empty cans and power outages do not require re debugging 
External level gauge with automatic storage and noise suppression function. Real time tracking and recording of the entire liquid level, advanced clutter suppression will not cause any jumping even when the tank is empty, and the liquid level gauge no longer needs to be manually re adjusted when the tank is empty or power is cut off.

technical parameter


Product NameExternal mounted liquid level gauge
Wiring methodTwo wire system/four wire system
Range specifications3m, 5m, 10m, 20m, 30m, 50m
measurement accuracy ：±1mm / ±0.1%FS / ±0.5%FS
Display resolution：1mm
On site display：OLED / LCD
Measure probe temperature：（-60~+220）℃ / （-60~+80）℃
Working environment temperature：（-60~+60）℃
Explosion proof, anti-corrosion, and protection level：EX d IIC T6 Gb； WF1；IP67
Power supply：DC24（±20%）V / DC24（±20%）V / AC220（±20%）
signal output 4~20mA/HART/Modbus fieldbus/TCP industrial Ethernet
Output loadStandard load 250 Ω/maximum load 1000 Ω
Measuring probe to host cableLiquid level probe 15m/calibration probe 25m
Installation method of measuring probe: Strong magnetic adsorption/strong adhesion
Electrical interface4 * M20 * 1.5, 4 * NPT1/2, 4 * NPT3/4, 4 * GT1/2, 4 * G3/4
Probe shell materialPBT/Stainless Steel 316L
Host materialCast aluminum alloy/stainless steel 316L
Special cable: Ordinary cable/Armored cable
Debugging methodInfrared remote control
Probe size：Φ16（mm） / Φ45（mm） / Φ60（mm）


Product size

installation diagram

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