⎝⎛星力捕鱼⎞⎠

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Address: Xiongyi, Jinhe Road, Jinhu County, Jiangsu Province
Lunan
Phone: 0517-86900901
0517-86900921
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Postcode: 211600
http://zzyfwh.com
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Level instrument
Balance hood type liquid level transmitter

Overview
,敏感器件安装在中继箱下端,投入部件为平衡罩,两者之间由导气管(导压)相连,液柱的压力通过空气的传导间接地由导气管传递给敏感部件,这样就避免敏感部器件与被测介质的直接接触。 LHBU740 balance hood type liquid level transmitter . The sensitive device is installed at the lower end of the relay box. The input component is a balance hood. The two are connected by an air pipe (pilot pressure). The pressure of the liquid column is indirectly guided by the air through the conduction of air. The trachea is passed to the sensitive parts, which avoids the direct contact between the sensitive parts and the measured medium. Not only suitable for general water measurement, but also for liquid level measurement in special occasions such as high temperature, thick, corrosive media. Widely used in chemical, metallurgy, power stations, water conservancy, urban water supply and industrial wastewater and other fields. zzyfwh.com

主要技术参数 Main technical parameters of balance hood liquid level transmitter

Range: 0-1 ~ 30m

Measurement medium: all kinds of corrosive liquids such as water, heavy and light oil, crude oil, acid and alkali

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

Output: 4 ~ 20mADC

Temperature: ambient temperature 0 ~ 60 ℃, medium temperature 0 ~ 250 ℃

Power: 24VDC

Dust and moisture resistance: all weather

Explosion-proof level: EXiaⅡCT5

Indication meter head: 100% pointer meter or 31/2 digit LCD display (users must specify otherwise when ordering)

工作原理 Working principle of balance hood liquid level transmitter

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

Among them P—the pressure felt by the sensor, in kPa

P—level density, unit g / cm3

H— height of the liquid surface to be measured, unit m

Po—pressure on the liquid surface in kPa

If the back cavity of the sensor communicates with the upper part of the liquid surface, Po is zero, so H is approximately equal to 0.102P / p. The transmitter converts the pressure signal felt into an electrical signal, and this signal is proportional to the liquid surface height.

Note: The container of the liquid to be tested must be open to the atmosphere, that is, it is open and cannot be closed, otherwise the measurement result is meaningless.