In the field of industrial automation and process control, accurate, stable and reliable pressure measurement is of vital importance. GRAEFF's pressure measurement series products provide high-performance pressure measurement solutions for various industries. Whether it is high-temperature and high-pressure environments, corrosive media, or liquid level monitoring and explosion-proof requirements, the GRAEFF GP series pressure sensors can accurately sense pressure changes and convert them into standard electrical signals, meeting the needs of industrial control, data transmission, and intelligent management.(Note: Some of the pictures in this article are from the Internet. If there is any infringement, please delete them.) 

1. Product Introduction 

GRAEFF's GP series pressure sensors/transmitters, with their high-precision measurement and stable performance, combined with corrosion resistance, high protection level and strong environmental adaptability to vibration and shock, offer flexible customization services for diverse pressure ranges, signal outputs and interfaces, achieving multi-scenario coverage and customized solutions. Covering multiple models, it is suitable for different industrial scenarios, including

GPN strain gauge series pressure transmitter

A variety of models are available for selection, including standard type, medium and high-temperature type, high-pressure type, intrinsically safe type, etc. 

The pressure measurement range is wide, covering from -0.1 to 0MPa to 0 to 250MPa 

General industrial applications, high-pressure liquid and gas control and measurement, petrochemicals, and explosion-proof pressure measurement and control for drilling platforms. 

GPS diffused silicon series pressure transmitter

The pressure measurement range is wide, covering from -100 to 0kPa to 0 to 60MPa 

This series can be used for pressure measurement and control of liquids, gases, foods, medicines or fluids with particles. 

GPC ceramic piezoresistive series pressure transmitter

The pressure measurement range is wide, covering -1 to 0bar to 0 to 400bar

This series can be used for the measurement and control of liquid and gas pressure. Measurement and control of corrosive fluids and gases in various fields; Measurement and control of fluid pressure in the air conditioning and refrigeration industry.

GPCC Series Ceramic capacitive pressure transmitter

The measurement accuracy can reach ±0.5%FOS, and it has good temperature characteristics

Adopting ceramic thick film integrated technology, it features excellent performance, small size, flexible packaging, corrosion resistance, and can directly contact and measure corrosive media without isolation. As an ideal pressure-sensing element, it is easy to integrate with the electronic circuit of the transmitter, featuring high reliability and good stability.

It is applicable to fields such as hydraulic systems, aerospace and defense, medical care, oil and gas extraction, etc.

GPF Series Sputtering film pressure transmitter

The measurement accuracy can reach 0.25%FOS, and it is packaged in stainless steel

The sputtered metal-based high-precision nanofilm core adopts a processing technology with a small size. The nanofilm strain resistance is directly fabricated on the metal elastomer, which not only increases the measurement range but also realizes the atomic combination of the sensitive element and the elastomer, minimizing the creep hysteresis of the sensor to the greatest extent It has enhanced the long-term stability and reliability of the product in harsh environments such as high temperature, high pressure, dust and humidity.

It is applicable to fields such as aerospace, mining equipment, engineering equipment, injection molding machines, petroleum, and natural gas.

GPM Series Micro-melt pressure transmitter

The measurement accuracy can reach ±0.5%FOS, and the pressure range is from 0 to 1 to 60MPa

This pressure sensor adopts highly reliable imported pressure chips, is equipped with wide temperature compensation technology and potting moisture-proof protection, and has stable performance. Supports special customization such as full welding and strong vibration resistance to meet diverse industrial measurement requirements.

It is applicable to fields such as hydraulic systems and valves, process control systems, engineering systems, stamping, forging and other equipment, refrigeration equipment and HVAC control.

GPE series Piezoelectric pressure transmitter

The measurement accuracy can reach ±0.5%FOS, and multiple electrical connection options are available

This pressure sensor is equipped with imported chips and laser resistance adjustment compensation technology. Constant voltage power supply ensures stability, and standard output facilitates connection with automated systems. The isolated structure can measure various fluids, and the sensitive element responds sensitively. Made of all stainless steel, it is corrosion-resistant, has high strength and can work stably in harsh environments.

It is applicable to industrial process control, liquid level measurement, gas and liquid pressure measurement, pressure detection instruments, pressure calibration instruments, hydraulic systems and switches, aviation and navigation, and other fields.

GPT Series Shield Engineering Pressure Transmitter

Measurement range: 0 to 60MPa, protection grade: IP68

Wide-range temperature compensation is carried out by adopting high-precision pressure cores and precise compensation technology. The pressure-sensitive diaphragm adopts a specially treated solid diaphragm. The exquisite mechanical transmission structure design ensures that the hard sand in the measured medium will not damage the isolation flat diaphragm. The structure is compact, corrosion-resistant, vibration-resistant and resistant to the impact of hard sand particles.

It is mainly used for mud measurement in various engineering equipment, tunnel shield machinery, brick-making machinery, hydraulics, oil exploration and water conservancy river DAMS.

GPL Series Submersible Level Pressure Transmitter

The measurement accuracy is better than ±0.5%FSO and the protection grade is IP65

The GPL series submersible liquid level pressure transmitter is specially designed for submersible liquid level measurement. The sensitive element adopts diffused silicon core, and the transmitter is equipped with a digital circuit board with strong resistance to radio frequency and electromagnetic interference. It features strong anti-interference ability and a wide temperature compensation range. The standard body of the transmitter is made of stainless steel and adopts a perfect assembly process to ensure its durability and long service life in high-demand industrial environments.

GPG Series Diaphragm Anti-Seismic Pressure Gauge

Accuracy grade 1.6, measurement range 70MPa, 100MPa, 160MPa

The GPG diaphragm anti-seismic pressure gauge is composed of German Bourdon tube components and cores, etc. It features a special isolation diaphragm mechanical structure principle, is filled with environmentally friendly media, is easy to install, and provides intuitive pressure display.

It is applicable to fields such as petroleum, chemical engineering, shipping, power, pharmaceutical equipment, food machinery, and heavy machinery.

2. Application field

GRAEFF's pressure measurement series products, with their outstanding performance, rich product types and flexible customization capabilities, have been widely applied in numerous industrial fields, providing reliable, accurate and efficient solutions for pressure measurement and control in various industries. The specific application areas include:

Petrochemical & Energy industry

In the petrochemical industry, pressure measurement equipment needs to confront multiple challenges such as high temperature, high pressure, and corrosive media. The intrinsically safe design of the GP series pressure sensors (such as the GPN strain gauge series pressure transmitters) can be safely applied in places with strict explosion-proof requirements, such as drilling platforms and oil refineries, to monitor pipeline pressure changes in real time and ensure production safety. Products with all-stainless steel anti-corrosion structure (such as GPC ceramic piezoresistive series pressure transmitters) can stably measure corrosive media such as strong acids and strong alkalis for a long time, and are widely used in pressure monitoring of chemical reaction vessels and oil and gas transmission pipelines.

Construction machinery & heavy industry

Heavy equipment such as shield machines and mining machinery are exposed to harsh working conditions like vibration, shock and sand and gravel wear during operation. The products in the GP series pressure sensors designed for harsh environments such as hard sand and mud (such as the GPT series shield engineering pressure transmitter) adopt special diaphragm treatment and precise compensation technology, which can resist sand and gravel wear and ensure long-term stable operation. Diaphragm anti-vibration and shock-resistant products (such as the GPG series diaphragm anti-vibration pressure gauge) can effectively alleviate the influence of mechanical vibration on measurement and are suitable for industrial scenarios with frequent vibration, such as engineering vehicles and heavy machine tools.

Air conditioning refrigeration & HVAC systems

In HVAC and refrigeration systems, the precise control of refrigerant pressure directly affects system energy efficiency and equipment lifespan. Among the GP series pressure sensors, the products with corrosion resistance and fast response characteristics (such as the GPC ceramic piezoresistive series pressure transmitter) can accurately monitor the pressure changes of refrigerants, helping to optimize the operational efficiency of the system. Moreover, their compact design makes them easy to install in refrigeration equipment with limited space, providing reliable support for applications such as commercial air conditioning and cold chain logistics.

Medical pharmaceuticals & food processing

In the medical equipment and food processing industries, the hygiene grade and measurement accuracy requirements for pressure sensors are extremely high. The GP series pressure sensors suitable for the food and pharmaceutical fields (such as GPS diffused silicon series pressure transmitters) are made of materials that meet hygiene standards and can be safely applied in scenarios such as fluid pressure control in pharmaceutical equipment and pressure monitoring in food processing. With high sensitivity and rapid response characteristics, they ensure the stability of the production process and the consistency of product quality.

Aerospace field

The aerospace field has extremely high requirements for the accuracy, reliability and environmental adaptability of pressure measurement. The high-precision products in the GP series can meet the high-pressure monitoring requirements of aircraft hydraulic systems and fuel pipelines. Models with anti-vibration and extreme temperature resistance characteristics can operate stably under complex working conditions such as aircraft flight, providing key data support for the safe operation of aerospace equipment.

Automobile manufacturing & Rail transit

The hydraulic equipment and braking systems in automotive production lines, as well as the braking pipelines of trains in rail transit, have strict requirements for the dynamic response speed and stability of pressure measurement. The GP series pressure sensors can capture the instantaneous changes in pressure in real time, ensuring the accuracy of pressure control during production equipment and driving processes. Models with fully welded and sealed structures (such as the GPF series sputtering film pressure transmitter) can adapt to the oil and dust environment in automotive manufacturing workshops and operate stably for a long time in key parts such as the hydraulic system of welding robots and the brake lines of rail vehicles.

In the liquid cooling system of new energy vehicle charging piles, pressure monitoring is the key to ensuring charging safety and efficiency. During the high-power fast charging process of liquid-cooled charging piles, the coolant needs to maintain a stable pressure circulation in a closed pipeline to achieve efficient heat dissipation. Among the GP series pressure sensors, the products with corrosion resistance and high precision can accurately monitor the changes in coolant pressure and provide real-time feedback on whether there are any abnormal conditions such as leakage or blockage in the system. Its wide temperature compensation capability can meet the pressure measurement requirements of charging piles in outdoor high or low temperature environments, ensuring the continuous and stable operation of the liquid cooling system and safeguarding the rapid charging of new energy vehicles.

Water conservancy environmental protection and liquid level monitoring

In water conservancy projects and urban water supply systems, real-time monitoring of liquid level and pressure is the core for ensuring stable water supply and flood control safety. The GPL series submersible liquid level and pressure transmitter, with its IP65 high protection level and excellent temperature compensation performance, can be directly submerged in water tanks, water tanks and other scenarios to accurately measure the liquid level height and convert it into a pressure signal, helping the smart water management system achieve remote monitoring and automatic regulation. In water conservancy DAMS and irrigation systems, its anti-interference design can effectively resist environmental electromagnetic interference and ensure the accuracy of data transmission.

Meanwhile, in the sewage treatment and waste gas treatment equipment of the environmental protection industry, pressure sensors need to withstand the corrosion of high-concentration pollutants. The GPC ceramic piezoresistive series pressure transmitters and other corrosion-resistant products can directly measure the pressure changes in sewage pipes and waste gas treatment towers, and provide real-time feedback on the operating status of the equipment. Its precise measurement data can also provide a basis for the automatic adjustment of the environmental protection system, helping enterprises achieve the standard discharge of pollutants and energy conservation and consumption reduction, and forming a full-chain pressure measurement solution from water conservancy monitoring to environmental protection governance.

3. Summary

The GRAEFF GP series pressure sensors/transmitters, with their core advantages of high precision, strong adaptability and customized services, cover the full range of demands from industrial automation to special environments. Whether it is the demanding petrochemical explosion-proof scenarios or the precise medical and food industries, GRAEFF can provide reliable pressure measurement solutions to help enterprises enhance production efficiency and safety.