Thread Content
Working principle of ultrasonic external level switch: Based on the principle of attenuation in ultrasonic wave propagation, a pair of sensing probes are installed at the same height within the tank, separated by 1 meter; one probe emits ultrasonic waves while the other receives them. The transmitting probe emits ultrasonic waves, which propagate through the medium inside the tank. As they travel, these ultrasonic waves lose intensity, and the remaining energy is sent to the receiving probe. The main unit determines whether liquid is present based on the amount of energy that remains. There is liquid, resulting in a high ultrasonic transmission rate and less residual energy. No liquid, low transmittance, high residual energy. 1. Non-contact liquid level measurement: The safe external liquid level switch is used for measuring toxic, corrosive, pressurized, flammable, explosive, volatile, or prone to leakage liquids. It does not require valves, connecting pipes, or fittings, has no leakage points, and does not come into contact with the liquids and gases inside the tank, making it extremely safe. Even when the instrument is damaged or under maintenance, there is absolutely no possibility of leakage, poisoning, or explosion. 2. Easy to install and maintain: no need for welding or tank cleaning during installation and maintenance, and it does not affect production. 3. Reliable and durable: The external level switch utilizes Dinghua’s advanced signal processing technology and manufacturing processes, ensuring reliability and durability. 4. Wide range of applications: It is not restricted by the pressure, temperature, density, dielectric constant, viscosity, or corrosiveness of the medium inside the tank. 5. Precision: The Dinghua external level switch offers multiple precision options ranging from ±1mm to ±5mm