SIS system/DCS system input type liquid level transmitter

The SIS system/DCS system uses an input type liquid level transmitter, which is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. It uses the pressure resistance effect of imported diffused silicon or ceramic capacitive sensing elements to convert static pressure into electrical signals. After temperature compensation and linear correction. Convert to 4-20mADC standard current signal output. The sensor part of the SIS/DCS system's input type liquid level transmitter can be directly inserted into the liquid, and the transmitter part can be fixed with flanges or brackets, making installation and use extremely convenient and overcoming the limitation of only working in low-temperature environments.

Characteristics and Applications of Input Type Liquid Level Transmitters for SIS/DCS Systems:

Adopting a diffusion silicon pressure sensor with a fully hard sealed structure. High reliability and good stability;

Suitable for oil level measurement of open oil tanks and floating roof oil tanks. And it can set the density of oil products on site, with heavy self compensation function;

Suitable for measuring the liquid level of corrosive liquids in fields such as petroleum, chemical, and environmental protection;

Suitable for measuring high-temperature liquids;

Suitable for measuring water levels in water companies, reservoirs, water towers, urban water supply and drainage systems, wells, and reservoirs;

It has' intrinsic safety 'performance and can be installed in the' 0 'zone.

Working Principle:

The TY-100 series immersion type liquid level sensor transmitter adopts the principle of static hydraulic measurement. When the measuring head is placed in the liquid, assuming the atmospheric pressure is Po, the height from the liquid level to the measuring element is h, the liquid density is r, and the local gravity acceleration is g, the pressure on the transmitter probe is Pl=Po x r × g × h. The pressure on the negative side of the sensitive element connected to the atmosphere through the air cable is P2=Po. Therefore, the pressure difference measured by the measuring element is P=Pl-P2=r × g × h. For specific liquid media and determined areas, r and g are constants, and the depth of the liquid can be obtained from the output current of the instrument.

Main technical parameters:

Measurement medium: liquids such as water and oil

Pressure type: gauge pressure, absolute pressure (default gauge pressure not required)

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), HART communication

Supply voltage: 12-36VDC

Medium temperature: -30~60 ℃

Environmental temperature: -40~85 ℃

Zero temperature drift: ≤± 0.05% FS ℃

Range temperature drift: ≤± 0.05% FS ℃

Compensation temperature: 0~70 ℃
Safe overload: 150% FS
Extreme overload: 200% FS
Sampling frequency: ≤ 2ms
Load capacity: (current type) 250~1425 Ω (voltage type) ≥ 2K Ω
Sealing grade: IP68

Explosion proof type: Exia Ⅱ BT6 (intrinsic safety type)

Long term stability performance: 0.1% FS/year
Vibration impact: Within the mechanical vibration frequency range of 20Hz to 1000Hz, the output variation is less than 0.1% FS
Mechanical connection (threaded interface): immersion type (submerged type)

Overall Dimension Drawing

Installation Diagram

Electrical wiring diagram