CNG automobile gas pressure gauge (sensor) is a very important part of automobile CNG system. It can directly display the gas pressure of the on-board gas storage tank and high-pressure pipeline, and can also convert the displayed pressure into an electrical signal and output it to the driving control. The oil and gas transfer switch on the platform can accurately display the natural gas reserves in the vehicle-mounted gas storage tank.
CNG vehicle gas pressure gauge
CNG automotive gas pressure gauge (sensor) is a very important component of the automotive CNG system. It can directly display the gas pressure of the vehicle's gas storage tank and high-pressure pipeline, and at the same time convert the displayed pressure into an electrical signal and output it to the driving control. The oil-gas conversion switch on the platform can accurately display the natural gas reserves in the vehicle-mounted gas storage tank.
Outer diameter: 50mm
Shell material: ABS engineering plastic (black), alloy aluminum (LY-12CZ), stainless steel (SUS304)
Installation method: radial, axial
Cover Material: Acrylic
Material of Bourdon tube: phosphor bronze Qsn6.5-0.1 or stainless steel SUS316L
The former is welded by high-frequency welding machine, and the welding material is silver alloy electrode. The latter is welded by argon arc welding of stainless steel. After welding, use a high-pressure test bench to do a high-pressure leak test at 550-600bar/20-30 minutes to ensure the absolute reliability of each watch during use.
Main body joint material: brass HPb59-1 or SUS316 selection
Connector thread: 1/8 1/4 PT, NPT, BSP, M14*1.5, etc.
Pressure gauge range: 0～400bar/6000psi double scale
Pressure gauge accuracy: Class 2.5
Sensor Part
The circuit part of the CNG automobile gas pressure gauge is a Hall magnetic induction circuit, and all electronic components are imported components. The pressure is converted into a voltage signal output, which has the advantages of high precision, good consistency, and long life.
Power supply voltage: DC12+2V
Wiring method: There are three wires: red, black, and yellow. The red wire is the power wire, the black wire is the ground wire, and the yellow wire is the voltage signal output wire.
It is used with CNG automobile gas pressure gauge as a supporting switch: indicator light type, digital display type.
Supporting indicator light switch. When the vehicle-mounted gas storage tank is filled with natural gas (the pressure is 180-200bar at this time), the four green indicator lights of the changeover switch on the console of the car cab are all on (the red light is off); when the pressure drops to 165-155bar, the fourth green light Off, the third green light is off when the pressure drops to 130-120bar, the second green light is off when the pressure drops to 90-70bar, the first green light is off when the pressure drops to 45-35bar, and the red light is on for an alarm. At this time, the gas stored in the tank can make the car travel 15-25 kilometers (the mileage is different for different models).
Supporting digital display switch. The linearly changing voltage signal output by the pressure gauge can make the digital display switch display 0-26Mpa digital pressure.
The special instrument for CNG compressed natural gas produced by WESEN Technologies has reliable quality and stable performance, and adopts the world's advanced helium mass spectrometer for strict leak detection. The leakage rate is ≤1×10-8mbar.1/s, which can fundamentally stop the leakage phenomenon. At present, this product of our company has played an important role in the automobile oil-to-gas transformation technology, and is also the OEM supplier of many car manufacturers.
