Using the principle of static pressure measurement: when the liquid level sensor is put into a certain depth in the liquid to be measured, the pressure formula on the liquid surface of the sensor is: Ρ = ρ.g.H + Po where:
P: The pressure on the liquid surface of the transmitter
ρ: Density of measured liquid
g: local gravity acceleration
Po: Atmospheric pressure on the liquid surface
H: Depth of the transmitter into the liquid
At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor through the gas-guiding stainless steel, and then the atmospheric pressure Po on the liquid surface is connected to the negative pressure chamber of the sensor to offset the Po on the back of the sensor.
Let the pressure measured by the sensor be: ρ.g.H. Obviously, by measuring the pressure P, the liquid level depth can be obtained.
Features:
◆Good stability, long-term stability of full scale and zero position can reach 0.1%FS/year. Within the compensation temperature range of 0 to 70°C, the temperature drift is less than 0.1% FS and less than 0.3% FS within the entire allowable operating temperature range.
◆Equipped with reverse protection and current limiting protection circuit, the transmitter will not be damaged if the positive and negative poles are reversed during installation. In case of abnormality, the transmitter will automatically limit the current to within 35MA.
◆Solid structure, no moving parts, high reliability and long service life.
◆Easy to install, simple in structure, economical and durable.
Main technical parameters:
Process: Diffused silicon, ceramic capacitor, sapphire capacitor optional. Split integrated type is optional, range: 0---0.5---200 meters, output: 4---20mA (2-wire system) power supply: 7.5---36VDC. It is recommended that the 24VDCCBM-2100/CBM-2700 input hydrostatic level meter is reliable and anti-corrosion and has a ceramic measuring unit probe for level measurement of clean water, sewage and salt water. GY500 input split type liquid level transmitter adopts diffused silicon piezoresistive core, 316 all stainless steel structure, and the shell adopts isolation and explosion-proof design. This input type liquid level transmitter is mainly suitable for liquid level measurement and control in rivers, groundwater levels, reservoirs, water towers and containers, etc. The circuit adopts signal isolation amplification, frequency cutoff interference design (strong anti-interference ability, lightning protection), overvoltage protection, current limiting protection, impact resistance, anti-corrosion and other designs. ] Main technical parameters: b] Measuring medium: water, oil and other liquids Pressure type: gauge pressure, absolute pressure (no requirement, default gauge pressure)]
b] Range: 0~300m intermediate range optional Comprehensive accuracy: 0.1%FS Output signal: 4~20mA (two-wire system), 0~5V, 1~5V, 0~10V (three-wire system) Power supply voltage: 12~36VDC Medium temperature: -30~60℃ Ambient temperature: -40~85℃ Zero temperature drift: ≤±0.05%FS℃ range temperature drift: ≤±0.05%FS℃ compensation temperature: 0~70℃ Safety overload: 150%FS limit overload: 200%FS sampling frequency: ≤2ms Load capacity: (current type) 250~1425Ω (voltage type) ≥2KΩ Sealing grade: IP68 Long-term stability: 0.1%FS/year Vibration impact: Within the mechanical vibration frequency of 20Hz ~ 1000Hz, the output change is less than 0.1% FS. Mechanical connection (threaded interface): input type (submersible type)] Product size (mm): b]
Invest in split level transmitter
⊙Select high-precision, isolated sensitive components imported from the United States, with reliable performance
⊙Gauge pressure or absolute pressure measurement
⊙Wide measuring range: 1mH2O～200mH2O
⊙Output: 4～20mA or 0～5V
⊙Power supply voltage: 24VDC (12~36VDC), mV output type is powered by constant current 1.5mADC or constant voltage 12VDC
⊙High accuracy, better than 0.2%F.S
⊙100% waterproof and moisture-proof, protection grade IP68
⊙Complete circuit functions, easy to adjust