The level transmitter needs to counteract the atmospheric pressure of the measured liquid level in real time to ensure the accuracy of its measurement. If the measuring range of the level transmitter is greater than 50 meters, its measurement accuracy is greater than the change in atmospheric pressure, and the non-gas guide cable can be selected. Level transmitters with a range of less than 50 meters need to use a gas guide cable, otherwise the measurement accuracy of the level transmitter will be affected. The pressure on the liquid surface of the level transmitter is as follows: Ρ=ρgh + Po: P : The pressure on the liquid surface of the level gauge (for ease of understanding, hereinafter referred to as pressure) ρ : the density of the liquid to be measured g : Acceleration due to gravity (as per 9.8015 at the time of commissioning) Po: atmospheric pressure on the liquid surface h : The depth at which the liquid is put into the level transmitter When the liquid level transmitter is put into a certain depth of the measured liquid, the pressure of the measured medium is introduced into the positive pressure chamber of the liquid level transmitter, and the atmospheric pressure Po on the liquid surface is connected with the negative pressure cavity of the liquid level transmitter through the cable air guide pipe to offset the Po on the front of the liquid level transmitter, so that the pressure measured by the liquid level transmitter is: ρgh, obviously, the liquid level depth can be obtained by measuring the pressure P. In general, the cable of the level transmitter should be two meters longer than its capacity to facilitate its installation and wiring on site. If you need to install an extension cord at the use site of the liquid level transmitter, it is necessary to ensure that the wiring part is dry and ventilated, and cannot be soaked, so as to avoid moisture and dirt blocking the atmospheric connecting pipe in the center of the cable, otherwise it will cause damage to the liquid level transmitter or inaccurate measurement. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi: 400-600-4496!