|Pressure range||-100kpa…0~20kpa…100MPA (optional)||1MPa=10bar1bar≈14.5PSI1PSI=6.8965kPa1kgf/cm2 = 1atmosphere 1
atmosphere ≈ 98kPa
|Overload pressure||2 times full scale pressure|
|Breaking pressure||3 times full scale pressure|
|Precision||0.25%FS、0.5%FS、1%FS （Higher precision can be customized ）|
|Compatible media||All media compatible with 304/316 stainless steel|
|Electrical performance||two-wire system||three-wire system|
|output signal||4~20mADC||0~10mADC, 0~20mADC, 0~5VDC, 1~5VDC, 0.5-4.5V, 0~10VDC|
|Vibration/shock||10g/5~2000Hz, axes X/Y/Z20g sine 11ms|
|Electrical connection||Hessman, aviation plug, waterproof outlet, M12*1|
|thread||NPT1/8 (customizable )|
|Pressure type||Gauge pressure type, absolute pressure type or sealed gauge pressure type|
This series of pressure transmitters have the advantages of low cost, high quality, small size, light weight, compact structure, etc., and are widely used for pressure measurement on-site such as compressors, automobiles, and air conditioners.
The product uses high-quality stainless steel structure, the pressure core and sensor chip are made of high-quality imported materials, using adjustment and digital compensation technology.There are standard voltage and current output modes.The product uses process technology for large-scale production, advanced design, complete technology, strict production, sophisticated equipment, standardized management, and sound quality assurance system. It is sold in more than 40 countries.
Application: compressors, building water supply, hydraulic control, air conditioning units, automobile engines, automatic monitoring systems, hydraulic stations, refrigeration equipment.
Take a single screw air compressor as an example to illustrate the working principle of an air compressor.The working process of screw air compressor is divided into four processes of suction, sealing and conveying, compression and exhaust.When the screw rotates in the shell, the screw and the tooth groove of the shell mesh with each other, and the air is sucked in from the air inlet and the oil is also sucked in at the same time.Due to the rotation of the tooth groove meshing surface, the sucked oil and gas are sealed and delivered to the exhaust port; during the transportation process, the tooth groove meshing gap gradually becomes smaller, and the oil and gas are compressed; when the tooth groove meshing surface rotates to the exhaust port of the shell, it is higher. The pressurized oil and gas mixture is discharged from the body.
In the air compressor control system, a pressure sensor installed on the air outlet pipe at the back of the air compressor is used to control the pressure of the air compressor.When the air compressor starts, the loading solenoid valve is closed, the loading cylinder does not act, and the inverter drives the motor to run without load.After a period of time (can be arbitrarily set by the controller, here is set to 10S), the loading solenoid valve opens, and the air compressor runs on load。When the air compressor starts to run, if the back-end equipment uses a large amount of air, and the compressed air pressure in the air storage tank and the back-end pipeline does not reach the upper pressure limit, the controller will actuate the loading valve, open the air inlet, and the motor will load Run, and continuously generate compressed gas to the back-end pipeline.If the back-end gas equipment stops using gas, the pressure of compressed gas in the back-end pipeline and gas storage tank will gradually increase.When the pressure upper limit setting value is reached, the pressure sensor sends out an unloading signal, the loading solenoid valve stops working, the air inlet filter is closed, and the motor runs without load.
When the air compressor runs continuously, the main body temperature of the compressor will increase. When the temperature reaches a certain level, the system is set to 80℃ (the controller can be set according to the application environment). The fan starts to run to reduce the working temperature of the main engine. . When the fan runs for a period of time, the temperature of the main engine drops, and the fan stops rotating when the temperature is lower than 75°C.
The pressure sensors on air compressors commonly used in the market can be used not only for air compressors, but also for water treatment equipment, industrial equipment, buildings, HVAC, petroleum, automobiles, etc., and OEM factories.