Differential pressure transmitterAdopting fully hard sealed oil filled isolation technology and a dual core design, the single static pressure protection is reliable, greatly enhancing the reverse overload level. Our proprietary intelligent compensation technology has stable long-term performance, making it suitable for a wide range of precision measurements, including gas and liquid flow, liquid level measurement in pressure vessels, leak detection, filter detection, test bench measurement, and micro pressure measurement in aviation and aerospace systems. Differential pressure transmitter is a type of differential pressure transmitter used to measure the differential pressure of liquid, gas or steam levels, and then convert the differential pressure signal into a 4-20mA DC signal output. The intelligent pressure transmitter then displays the differential pressure value through a display instrument. Differential pressure transmitters have sturdy vibration resistance, range, zero point, and damping that can be continuously adjusted on site. Characteristics such as high degree and good stability. The differential pressure transmitter combines different sensor technologies with a compact aluminum alloy shell or plastic shell, and can be used for a variety of liquid and gas measurements, such as measuring the ventilation ducts, filters and fans in the HVAC field, and the liquid level measurement in an enclosed pressure chamber.
Installation requirements for differential pressure transmitter:
The installation position of differential pressure transmitters on process pipelines is related to the measured medium. In order to achieve better installation results, the following situations should be considered:
Prevent direct contact between the transmitter and corrosive or overheated test media;
Prevent the deposition and blockage of debris in the pressure pipe;
The length of the pressure pipes on both sides of the positive and negative pressure should be as similar as possible;
The liquid column pressure head inside the pressure pipes on both sides of the positive and negative pressure should be balanced;
The pressure pipe is installed in a place where the temperature gradient and temperature fluctuation are minimized.
When measuring liquid flow rate, the differential pressure transmitter should be installed next to or below the measured pipeline to facilitate the discharge of bubbles into the pipeline;
When measuring gas flow, the differential pressure transmitter should be installed next to or on top of the measured pipeline to facilitate the flow of accumulated liquid into the pipeline;
When measuring steam flow rate,Differential pressure transmitterIt should be installed below the tested pipeline so that the condensed water can fill the impulse pipe.
Special attention should be paid to prevent the temperature of the medium in contact with the differential pressure transmitter from exceeding the limit temperature of the transmitter when measuring steam or other high-temperature media.
Image of pressure transmitter
Precautions for differential pressure transmitters:
(1) When designing and installing, the pressure tapping hole at the bottom of the oil tank should be lowered as much as possible to eliminate errors caused by temperature changes, and temperature compensation should be introduced if necessary.
(2) In the case where the horizontal cross-section of the oil tank body is uneven (small above and large below), compensation measures should be considered. Use WP-H80 series liquid level capacity controller for the secondary meter.
(3) To achieve a certain level of accuracy, if a breathing valve is installed on the top of the oil tank, a differential pressure transmitter must be used instead of a pressure transmitter. For open oil tanks or when precision requirements are not high, pressure transmitters can be directly used for easy installation.
(4) Smart meters should be used as much as possible for secondary meters, which can easily change the range and achieve temperature compensation.
Differential pressure transmitter is used to measure the pressure of gases or liquids in pascals (pa or bar); Pressure transmitters generally refer to gas and liquid pressure, but there are also pressure sensors called weighing sensors, with units in newtons, kilograms (force), or tons. The differential pressure transmitter measures the relative pressure difference between two gases or liquids inside a container.Differential pressure transmitterIt is an on-site instrument used to detect the flow rate, differential pressure, pressure, liquid level, density and other parameters of fluids during the production process, as it is in direct contact with the measured medium So it often operates in harsh environments such as high temperature, low temperature, corrosion, vibration, impact, radiation, etc. And due to the large-scale and complex process flow, as well as the application of computer distributed control. Therefore, there are high requirements for the degree, long-term stability, and reliability of the transmitter.