Capacitive liquid level detection instrument

Shandong Aipuxin Automation Instrument Co., Ltd. is one of leading manufacturers and suppliers of capacitive liquid level detection instrument in China, also supports customized service with low price. Please rest assured to wholesale cheap capacitive liquid level detection instrument in stock here from our factory.

Technical Parameter

Product Introduction:

Capacitive liquid level detection instrument is a type of variable dielectric capacitor, which uses changes in the surface of the measured medium to cause changes in capacitance.

It can be installed perpendicular to the oil level in the tank compared to the normal driving state of the car. The two inner and outer pipes, which are equivalent to the electrode plates of the capacitor, need to maintain a certain gap to measure the remaining oil amount through changes in the oil level position.

The sensor has the advantages of large dynamic range, fast response speed, small zero drift, simple structure, and strong adaptability.

Working principle

Working principle of capacitive liquid level detection instrument:

The operating principle is based on radio frequency (RF) capacitor technology. Apply radio frequency to the probe and determine by continuous analysis

The impact of the surrounding environment. Since all materials have a dielectric constant and a different conductivity than air, when the three-wire capacitive liquid level sensor probe comes into contact with the material, the total impedance reflected by the small capacitance shift changes. Since the energized probe and the container wall form the two plates of a capacitor, the insulator of the probe and the surrounding air become the dielectric material. When air (dielectric constant 1.0) is replaced by any other material (dielectric constant >1), the change in capacitance value causes a change in impedance. This influence is caused by

After the circuit is measured, it is compared to a reference established by the sensitivity device settings (circuit).

Capacitive liquid level detection instrument are suitable for measuring the liquid level (material level) of conductive and non-conductive liquids (solids) under pressure in pressurized containers. It adopts two-wire power supply, outputs 4-20mA, superimposes HART digital signal, and displays liquid level locally at the same time. It can convert various changes in liquid level parameters into standard current signals and transmit them to the operating room for centralized display, alarm or automatic control by secondary instruments or computer devices.

Capacitive liquid level detection instrument can be used for continuous detection of liquid level, material level or material level under special conditions such as high pressure, high temperature, strong corrosion, easy crystallization, anti-clogging, anti-freeze, solid powder, particles, etc., and can also be widely used in various applications. Inspection and control of industrial processes.

Product Features

4-20mA/RS-485 multiple signal outputs to facilitate different system configurations.

Capacitive liquid level detection instrument is suitable for liquid level measurement in high-temperature and high-pressure vessels. The measured value is not affected by the temperature, specific gravity, shape and pressure of the liquid being measured, and has complete over-current, over-voltage, and power polarity protection.

Anti-adhesion

Advanced anti-adhesion circuit design eliminates material adhesion and creates false error signals

Adaptable

This sensor can detect solid and liquid materials under conditions of high temperature, high pressure, large dust, and high viscosity, and is not affected by the dielectric constant of the measured medium.

One-click calibration

Due to the use of digital circuits, users can complete the calibration in one go in the short position state.

Simple installation and debugging

Fully sealed integrated installation structure, no mechanical moving parts, high reliability, and basically maintenance-free. Once installed, no need for multiple commissioning.

Product Details

Product Application

Capacitive liquid level detection instrument is widely used in various fields such as petroleum, chemical industry, metallurgy, power, papermaking, pharmaceuticals, etc. Chemical factories: detect the liquid level of chemical raw materials such as polyester, spandex, acid, alkali, etc; Environmental protection: detection of sewage level; Boiler factory: detect the liquid level of the medium in the pressure vessel; Hydraulic machinery: detection of lubricating oil level; Grain department: testing the level of edible oil; Oilfield: Detect the liquid level of finished oil.

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