Product description:

Summary

LHBU740 balance type liquid level transmitter, the sensitive device is arranged on the lower end of the relay box, input components for the balance between the cover, comprising an air duct (pressure) connected to the liquid column pressure by air conduction indirectly by airway to sensitive components, so as to avoid direct contact with the sensitive device and the measured medium. The utility model is not only suitable for the measurement of ordinary water, but also suitable for the liquid level measurement of the special occasions such as high temperature, viscosity and corrosion. Widely used in chemical industry, metallurgy, power plant, water conservancy, urban water supply and industrial wastewater and other fields.

Main technical parameters

Range: 0-1 ~ 30m

Medium: water, oil, all kinds of heavy crude oil, acid and other various corrosive liquids

Accuracy: 0.25%F· S; 0.5%F· S (generally 0.5%F· S)

Output: 4 ~ 20mADC

Temperature: ambient temperature 0 ~ 60 DEG C, medium temperature of 0 ~ 250 C

Power supply: 24VDC

Dust proof and moisture-proof

Explosion proof level: EXia II CT5

Indicator: 99% pointer meter or 31/2 LCD display (when ordering should be specified)

Working principle

When the balance of the transmitter is put into a certain position in the liquid, the pressure of the sensor through the air duct is: P=9.807pH+Po

Where P— sensor felt pressure, unit kPa

P— liquid level density, unit g/cm3

H— height of liquid level to be measured, unit M

Po— pressure on the liquid level, unit kPa

If the back surface of the sensor is connected with the upper part of the liquid level, the Po is zero, so the H is approximately equal to 0.102P/p, and the transducer converts the pressure signal into an electrical signal, which is proportional to the height of the liquid level.

Note: the container of the liquid to be measured through the atmosphere, that is open, can not be closed, otherwise the results are meaningless.