What is the measurement principle of this type of differential pressure level transmitter, namely E+H?
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This post was last edited by ooxtoo on 2020-12-29 at 14:46. Many of these E+H level gauges are installed in use; according to the manual, they operate on a differential pressure principle. The description marked “2” in the diagram states that “the negative pressure side is exposed to the outside”. I would like to ask about its measurement principle. Thank you. The Chinese version of the manual does not contain typical installation diagrams of this type; therefore, the English version has to be attached instead.
Since the container is not sealed, it’s sufficient to connect it to high pressure; there’s no need to connect it to low pressure
The original poster is not from an instrumentation field; this is the very basics.
h = (p_positive – p_negative) / density * g; P_negative = 0
P=ρgh, basic junior high school knowledge: lol
The pressure gauge of E+h works on the same principle, only the value that is used for comparison is different; in high-altitude areas, it is important to purchase a gauge that measures absolute pressure
Isn’t this just a single-flange level gauge? The negative pressure side is connected to atmospheric pressure. It can improve the accuracy of measurements and eliminate measurement errors caused by changes in atmospheric pressure.
Isn’t this just a single-flange level gauge? The negative pressure side is connected to atmospheric pressure. It can improve the accuracy of measurements and eliminate measurement errors caused by changes in atmospheric pressure.
There’s not much to say about single-flange level gauges: the negative pressure side is connected to the atmosphere, and they are suitable only for open tanks or situations where the pressure inside the tube is at atmospheric level. If the pressure inside the tank is not atmospheric, then a double-flange level gauge is required
Applicable only to atmospheric-pressure tanks; the pressure measured on the positive-pressure side is the pressure generated by the medium (ρgh). Since ρg is known, h can be calculated