Differential Pressure transmitter

MEJ-2051 differential pressure transmitter is a classic industrial instrument under the Mejor brand. This series is known for its high precision, high stability, and strong adaptability, and is widely used in industries such as petroleum, chemical, power, pharmaceuticals, and food. It is mainly used to measure differential pressure, pressure, liquid level, and other parameters of liquids, gases, or vapors, and convert the measurement signal into a standard electrical signal (such as 4-20mA DC) output for data acquisition and monitoring in industrial control systems.

high precision measurement
Adopting advanced silicon micro capacitive sensor technology, the measurement accuracy can reach ± 0.075% (or even higher, depending on the specific model), which can meet the precise measurement requirements in harsh industrial environments.
Support wide range ratio (such as 100:1), which can maintain stable performance in a wide range of pressure changes.
Intelligent design
Built in microprocessor, supports HART communication protocol, enables remote configuration, calibration, and diagnosis, and improves the integration efficiency of industrial automation systems.
Equipped with temperature compensation and static pressure compensation functions, reducing the impact of environmental factors such as temperature fluctuations and static pressure changes on measurement results.
Structural and material advantages
The main body is made of all stainless steel material (such as 316L stainless steel), and the membrane material can be selected from corrosion-resistant materials such as Hastelloy and Tantalum, suitable for harsh working conditions such as strong acid, strong alkali, and high temperature.
Compact design, lightweight (approximately 2.7kg), supports multiple installation methods (such as flange installation, threaded installation), and is compatible with different pipelines and containers.

Flow measurement: In conjunction with throttling elements such as orifice plates and Venturi tubes, fluid flow is calculated by measuring differential pressure.
Liquid level measurement: used for liquid level monitoring of open or closed containers, converting the liquid level height through differential pressure values (combined with liquid density).
Pressure measurement: directly measuring gauge pressure or absolute pressure, suitable for scenarios such as pipeline pressure monitoring and equipment load monitoring.
Reliability and Maintenance
No mechanical moving parts, reducing wear and failure points, long maintenance cycle.
Support online diagnostic function, which can monitor sensor status, circuit faults or medium abnormalities (such as blockage, crystallization) in real time, reducing the risk of shutdown.
Typical application cases
Chemical industry: Monitor liquid level and pressure in reaction vessels to prevent material leakage or overpressure risks; Cooperate with orifice plates to measure the flow rate of corrosive media such as sulfuric acid and caustic soda.
Oil and natural gas: used for wellhead pressure monitoring, crude oil storage tank level measurement, suitable for harsh environments with high temperature, high pressure, and high sulfur content.
Food and pharmaceuticals: Designed with sanitary flanges and polished membranes to meet clean production requirements, used for sterile tank level control, steam flow measurement, etc.
Power industry: Measure boiler steam differential pressure and condenser liquid level to ensure safe operation of power generation equipment.

Parameter confirmation:
Measurement range (differential pressure/pressure range), medium characteristics (corrosiveness, temperature, density), installation method (horizontal/vertical pipeline, container type).
The explosion-proof level (such as explosion-proof Ex d, intrinsic safety Ex ia) and protection level (IP67, etc.) must comply with on-site safety standards.
Accessory selection:
Configure three valve group, five valve group or isolation tank according to the requirements to prevent the medium from directly impacting the transmitter diaphragm.
For high-temperature media (such as steam), it is necessary to install condensing or cooling pipes to avoid sensor overheating and damage.
Calibration and maintenance:
Regularly perform zero calibration and range verification, and it is recommended to do so at least once a year; If the medium is prone to crystallization or viscosity, the maintenance cycle should be shortened and the pressure pipe should be cleaned.

MEJ-2051 differential pressure transmitter is a core instrument in the field of industrial automation. With high precision, high reliability, and flexible intelligent functions, it has become the first choice for parameter measurement under complex working conditions. Its design balances performance and usability, meeting both the measurement needs of traditional industries and adapting to the intelligent upgrade of digital factories. It is a key “perception link” connecting production sites and control systems.