A preliminary attempt to illustrate online density meters without zero drift. . All experts in density measurement are welcome to come to Huashan to compete and gather together in a lively atmosphere. .
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This post was last edited by 1111111 on 2017-3-13 09:38 to provide a starting point and illustrate an online density meter without zero drift. . All experts in density measurement are welcome to come to Huashan to compete and gather together in a lively atmosphere. . {:3_51:} . . The following is an online analyzer for simultaneous measurement of density and concentration; density and concentration are output synchronously via 4–20A signals in a two-wire system! This combined measurement method effectively addresses the issues of numerous measurement parameters leading to high power consumption, as well as the difficulty of using a single instrument for intrinsically safe explosion-proof operations. It supports intrinsically safe explosion-proof standards of E*aIICT6, and can be used in Zones 0, 1, and 2; it is also suitable for use in the most severe explosive gas environments in coal mines. I have searched through domestic and international sources and found no precedents for such a method of signal processing – it’s possible that you are the first person in the world to use this approach :lol :P .
Bro Pig, when it’s not allowing liquid to pass through, is there something that first captures the liquid, and then something like silicone oil is used to transmit pressure to the sensor diaphragm?
Of course it’s true~~~ It’s based on the principle of pressure difference; whether there is any drift can be detected as soon as power is applied. For example, take a bucket, fill it with water, submerge the probe completely, and monitor it for several hours – this way, it’s possible to clearly determine whether there is any drift in the density meter’s range, and by how much. Another example: drain all the water so that the probe is completely in air, then monitor it for several hours again; this will allow you to clearly determine whether there is any drift in the density meter’s zero point, and by how much. Right? It’s true that there’s no zero drift; you don’t have to worry about inspections – feel free to check whenever you want! It’s true that there’s no zero drift; you don’t have to worry about inspections – feel free to check whenever you want! It’s true that there’s no zero drift; you don’t have to worry about inspections – feel free to check whenever you want! .
Hello, younger brother! It’s not as you said, haha. The diaphragm isn’t in contact with the liquid; instead, a leak-free gas collection tube is used to convert hydraulic pressure into an equivalent amount of air pressure, thereby keeping the sensor diaphragm in a gaseous environment. Meanwhile, the densitometer uses some very precise measurement techniques that I don’t want to reveal here :P, to determine the exact position of the liquid level within the gas collection tube. Finally, the density is calculated using the formula ΔP = ρgh. The reason I’ve marked h in red here is to indicate that this value of h is different from the constant h used in measurements where the diaphragm is in contact with the liquid; it’s a dynamic variable, and its function can be expressed as h = f(x1, x2, x3). Refer to this diagram: . .
Products are available for everything from a low absolute pressure of 0.001 Pa in high vacuum to a positive pressure of 30 MPa. . . . Look at the 4 pictures above me.
I’ve learned it; that function behind Pig Brother really impressed me: lol
Hehe. A little trick~~~
Listeners, 115 of you – come and see for yourselves~~~