Differential pressure transmitter

NegotiableUpdate on 12/14

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Differential pressure transmitter is an industrial measuring instrument based on the principle of differential pressure, which is used to detect the difference between two pressure points. It can convert differential pressure signals into standard electrical signals (such as 4-20mA), enabling indirect measurement of parameters such as liquid level, flow rate, and density. It has the characteristics of high precision, strong stability, and outstanding anti-interference ability, and is widely used in industrial automation control systems such as petroleum, chemical, power, and water treatment.

Product Details

1、 Product Overview

Differential pressure transmitterDPT is a key detection instrument in the field of industrial process control, which accurately captures the pressure difference of fluid media to achieve real-time monitoring and signal conversion of core parameters such as flow rate, liquid level, and density. This product integrates resonant variable capacitance sensing technology and intelligent chip processing solutions, combining analog stability and reliability with intelligent flexibility and efficiency. It can operate continuously in harsh environments such as high temperature, corrosion, and vibration, and is widely suitable for the needs of multiple industries such as petrochemicals, power energy, and biomedicine.

2、 Core technology and performance advantages

Ultra high precision measurement system

Using the "endpoint method" calibration technique, the measurement accuracy reaches ± 0.07% FS, and the linearity is significantly better than the "excellent fitting line method" calibration effect of similar products. Built in computerized curve fitting algorithm, dynamic linearization processing and temperature compensation are implemented through a 16 bit microprocessor. The low-temperature drift characteristic ensures an error of ≤ 0.1% FS/year within the range of -40 ℃ to 104 ℃. The range ratio is as high as 100:1, covering a wide measurement range from 0~0.1kPa to 0~40MPa, meeting diverse scenarios from micro differential pressure to high differential pressure.

Durable and reliable structural design

The sensor adopts a laser welded fully sealed structure and is equipped with positive and negative overpressure limiting devices. It can withstand 100 times overpressure impact under any pressure range and can also withstand a maximum static pressure of 32MPa. The membrane that comes into contact with the medium can be made of corrosion-resistant alloy material, which is suitable for special media such as strong acidity, alkalinity, viscosity, and suspended solids. It can be washed in pharmaceutical and hygiene level scenarios to avoid cross contamination.

Intelligent and convenient operation and maintenance system

Equipped with SecureCal ™ Calibration key, supports quick adjustment of zero point and range coefficient, and has factory setting recovery function, effectively preventing misoperation and calibration tampering. Synchronized transmission of 4-20mA analog signals and digital signals is achieved through the HART protocol, which can be connected to a handheld device for remote monitoring and parameter configuration, with a response time as low as 0.2S. The entire series is designed with a unified structure, weighs only 2.4kg, and has an installation height of 166mm. It is compatible with traditional 1151 series products and has strong interchangeability.

3、 Typical application scenarios

Petrochemical flow measurementUsed in conjunction with orifice plate throttling elements, it achieves flow monitoring with an accuracy of ± 0.3% under a pipeline pressure of 1.2MPa. After application in a certain oil field, it has reduced trade losses by over 5 million yuan annually.

Liquid level control of electric boilersBy balancing the container and converting the water level into a differential pressure signal, the fluctuation range of the steam drum water level is reduced to ± 5mm, and the number of boiler shutdowns is reduced by 60%.

Biomedical filtration monitoringReal time tracking of the pressure difference before and after the filter element, automatic alarm when the value exceeds 120kPa. After the application of the filter element by a certain vaccine enterprise, the service life of the filter element has been extended to 12 months, saving an annual verification cost of 800000 yuan.

4、 Key parameters and safety certification

parameter category	specific indicators
output signal	4~20mA DC， Equipped with HART digital protocol
power supply	12-45V DC (conventional 24V DC)
environmental adaptability	-Working temperature of 40 ℃~85 ℃, relative humidity of 5%~95%
Explosion-proof rating	ExdIICT6 Explosion proof Type
protection function	Triple protection against overvoltage, short circuit, and reverse power supply connection

The product has passed the GB/T13850-1998 standard certification, with a full life cycle stability of 60 months, providing reliable guarantee for the safety and efficiency of industrial production.