The tuning fork level switch is a liquid level detection instrument designed according to the principle of tuning fork, which is widely used in the level measurement of containers, storage tanks, tanks and pipelines. Due to the complex and diverse application conditions in industrial production, when applied in some explosive hazardous environments, it is necessary to select explosion-proof tuning fork level switches, in order to meet the needs of users, it is counted as an automatic explosion-proof tuning fork level switch for users to choose.
Counted as an explosion-proof Ring-11 tuning fork level switch 1
It is considered to be an explosion-proof tuning fork level switch, and there are currently two types: flameproof type and intrinsically safe type (referred to as intrinsically safe type). Among them, the flameproof tuning fork level switch mainly uses a metal shell to seal the electrical components to prevent the ignition source from contacting with dangerous gases. The intrinsically safe tuning fork level switch is mainly designed to limit the energy in the electrical circuit and cooperate with the structural design of the electrical equipment, so that the electrical circuit cannot produce the energy required by the ignition source.
Counted as an explosion-proof Ring-11 tuning fork level switch 2
In addition to the quality of the tuning fork, the correct installation of the tuning fork level switch is also very important. When installing the explosion-proof tuning fork level switch, in addition to the installation precautions of the general tuning fork level switch (see the installation method and precautions of the tuning fork level switch (with drawing)), affected by the explosion-proof form, the following differences should also be paid attention to when installing the explosion-proof tuning fork level switch:
1. For flameproof tuning fork level switch
Since its shell is its most important protective barrier, attention should be paid to the following: (1) The structure of the instrument housing cannot be damaged or changed, such as drilling, grinding, and knocking. (2) When installing, pay attention to the accuracy of the sealing surface of the protective shell, and do not polish or bump the sealing threads of the upper and lower shells. (3) The cable protection joint should be an explosion-proof joint, and the sealing tape should not be exposed. (4) The instrument is reliably grounded and needs to be used within a reliable temperature range.
In the case of flameproof tuning fork level switches, the housing is the most important protective barrier
2. For intrinsically safe tuning fork level switches
It is mainly by limiting the energy of the electrical circuit, and attention should be paid to the following during installation: (1) Install the associated equipment of the specified model and reliably ground. (2) Pay attention to the line length of the instrument, and require that the distributed capacitance and distributed inductance of the line do not exceed the maximum allowable value specified by the instrument. (3) Pay attention to the requirements of the use environment and power supply, and do not use it with overpressure and temperature.
It is counted as an intrinsically safe Ring-11 tuning fork level switch
The Ring-11 tuning fork level switch is a highly reliable, compact control switch designed for level measurement. With a tuning fork length of only 40 mm, it is suitable not only for level measurement in containers, tanks and tanks, but also for level measurement in conduits. It is widely used in hydrochloric acid, sulfuric acid, nitric acid, lye, industrial wastewater, syrup, liquid medicine and other liquid level measurement, and is especially suitable for complex measurement occasions with foam, bubbles, viscous liquids and vibration interference. Since the Ring-11 tuning fork level switch has passed SIL certification and intrinsically safe and flameproof double explosion-proof certification (intrinsically safe Ex ia IIC T6~T1 Ga, flameproof Ex d IIC T6~T1 Gb), it is ideal for liquid level control in the petrochemical industry.
Ring-11 Tuning Fork Level Switch SIL Certification Certificate (Chinese) - The certificate can be queried and downloaded from the official website of the National Certification and Accreditation Administration
Tuning fork level switch | Counted as an automated official website