GPT235 Anti-corrosion pressure transmitter

Pressure Transmitter and Corrosive Medium

In industrial production process, various types of strong corrosive medium are encountered. These products are highly dangerous, have high safety risk. Therefore, the real-time monitoring are needed to prevent accidents. Among them, pressure measurement and control is a necessary step. On the one hand, measuring the parameters of the corrosive liquids can ensure the safety and stability of the production processes. For example, in chemical industries, accurately measuring the pressure parameters contributes to control the reaction processes and prevent the devices damaging and the accidents. On the other hand, measuring the corrosive liquids also benefits the environment. The environment pollution can be quickly found and dealt with by monitoring the amount of the discharged corrosive substances.

Problems of Pressure Measurement

1.Material selection: corrosive medium will cause serious corrosion to pressure measuring instruments made of ordinary metal, and cause damage to the key components of the instruments like sensors and diaphragms, which will shorten the service life of the instrument.

2.Measurement accuracy: The corrosive medium has high requirements on accuracy. The accuracy of the sensors should be stable, and the measurement should not be effected by the temperature changes to avoid misjudgment of the production process.
3.Security issues: The corrosive medium may leak and appear safety risk because of the sensor sealing problems in the process of production and storage. There remains a question, that is, how to improve the sealing structure of the sensor, and achieve safety. 

Product recommendation

GAMICOS develops GPT235 anti-corrosive pressure transmitter to measure corrosive medium. The shell adopts PTFE or PVDF, the core components are imported ceramic piezoresistive or ceramic capacitance pressure sensors, cooperated with a dedicated signal  conditioning circuit to perform comprehensive temperature compensation processing, making the pressure transmitters combine the excellent chemical resistance of the PTFE material and high stability and durability of the ceramic sensor, which is suitable for various industrial applications.

Customer case

A customer in Chile took over a reservoir area reconstruction project of a small chemical industry. The reservoir area mainly stores highly concentrated sulfuric acid solution. In the past, the liquid level data mainly relies on manual inspection. It is time-consuming, labor-intensive and prone to safety accidents. Now, the real-time monitoring of the liquid level is needed, the storage amount of sulfuric acid should be grasped at any time, which helps to arrange production plans, and monitor liquid level to prevent flooding and safety accidents.

Solution

According to customer requirements, we recommend GPT235 anti-corrosion pressure transmitter. The pressure transmitter adopts PVDF housing shell, and E+H ceramic capacitance pressure sensor to achieve pressure measurement of the tanks. The data relationship between pressure and liquid level is converted into the liquid level data of the sulfuric acid tank to achieve real-time measurement of liquid level. The collected data is connected to customers’ PLC through 4~20mA signal, and achieve data visual management.

Program effect

1.Accurate measurement：Through liquid level monitoring, we are able to accurately grasp the liquid level in the sulfuric acid storage tank. Whether the tank is in static storage state, or in the process of loading and unloading materials, it can provide accurate liquid level data in real-time in a extremely small error, ensuring accurate control of the amount of material in the tank. 

2.Prevent spills: It can monitor the liquid level in time to prevent sulfuric acid from overflowing the storage tank, and avoid severe threaten to the surrounding environment and people. Once the liquid level reaches the safety alarm line, the system will announce the alarm and remind the operators to adopt relative measures. 
3.Reduce manual inspection costs: Replace traditional manual inspection, save time and effort and reduce safety risks. The liquid level monitoring system can achieve remote real-time monitoring, it largely reduce the frequency and costs by manually inspection.