Counting as explosion-proof tuning fork level switch is a liquid level detection instrument designed with tuning fork principle, which is not only suitable for liquid level measurement in containers, storage tanks, tanks and pipelines. And it is widely used in industrial production with explosive environment. Due to the different on-site operating conditions, to meet the application requirements for different working conditions, there are two types of explosion-proof tuning fork level switches developed. So what's the difference between different types of explosion-proof tuning fork level switches?
Before the introduction, we first understand the following two types of explosion-proof tuning fork level switch and its working principle:
Explosion-proof tuning fork level switches are available in flameproof and intrinsically safe (referred to as intrinsically safe) types. Among them, the flameproof type tuning fork liquid level switch is mainly used to seal the electrical components with a metal shell to prevent the ignition source from coming into contact with the dangerous gas. The intrinsically safe tuning fork level switch is mainly used to limit the energy in the electrical circuit and cooperate with the structural design of the electrical equipment, so that the electrical circuit can not produce the energy required to reach the ignition source.
Compared to the ordinary tuning fork level switch, the explosion-proof tuning fork level switch also has its own characteristics in installation, in addition to observing the installation notes of the common tuning fork level switch (see the installation and application of the tuning fork level switch). The difference between the above explosion-proof forms, and the installation precautions for different types of explosion-proof tuning fork level switches are also different. details as follows:
1. For explosion-proof tuning fork level switch As the shell of the explosion-proof instrument is the most important protection barrier, it should be noted during installation:
1 The instrument is reliably grounded and must be used within a reliable temperature range.
2 When installing, pay attention to the accuracy of the sealing surface of the housing. Do not sand or bump the sealing threads of the upper and lower housings.
3 Cable protection joints should be explosion-proof joints, and the sealing band must not be exposed.
4 can not damage or change the instrument housing structure, such as drilling, grinding, knocking.
2. For intrinsically safe tuning fork level switches Since intrinsically safe meters primarily limit the energy of the electrical circuit, attention should be paid during installation:
1 Pay attention to the use of environmental requirements and power supply requirements, do not use over-temperature and over-temperature.
2 Pay attention to the line length of the instrument. It is required that the distributed capacitance and distributed inductance of the line should not exceed the maximum allowable value specified by the meter.
3 Install the specified model of associated equipment and ground it reliably.
The tuning fork level switch is divided into Ring-11 tuning fork level switch and Ring-21 compact tuning fork level switch. The Ring-21 compact tuning fork level switch is compact and lightweight. It is especially suitable for liquid level measurement in pipes and small spaces. However, it does not have explosion-proof function and can only be used in non-explosive environments.
The Ring-11 tuning fork level switch is a highly reliable and compact control switch for level measurement. Tuning fork length is only 40mm, widely used in containers, storage tanks, tanks, catheters in hydrochloric acid, sulfuric acid, nitric acid, lye, industrial wastewater, syrup, liquid and other liquid level measurement, especially for foam, bubbles, viscous Liquids and vibrations interfere with complex measurement occasions. Because Ring-11 tuning fork level switch has passed the intrinsically safe and flameproof dual explosion-proof certification (Intrinsically safe ExiaIICT6, explosion-proof ExdIICT6), with explosion-proof function, it is an ideal choice for liquid level control in the petrochemical industry. (The article is taken from:, please indicate the source.)
Features
â—† Small Compact Size,Global safety approvals
â—† Long life & high reliability.
â—† Wide Range of wires Terminals.
â—†Variety of actuator and terminals
â—†Customized Designs
â—†Widely used in household appliances, electric force, telecommunications, machine tool, vessel, textile, printing, Mining machine, Mustic Instrument, etc.
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