Selection of mercury microflow meters
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This post was last edited by liaoshengli on 2022-10-16 at 17:28. I would like to ask the experts in this group: in the process of producing mercury chloride, the medium to be measured is mercury; the flow rate range is 0–50 ml/h, the operating temperature is normal temperature, the pressure is 0.3–0.6 MPa, and the pipe diameter is DN25. What type of flow meter should be used in this case? Are there any reliable use cases? Automatic control instruments
This post was last edited by sdlyml on 2022-10-11 08:14. Flow rate range: 0–50 ml/h, DN25 pipe? That can’t be right; it’s not possible to fill the pipe at all. Please check the pipe diameter. The HighSense (Micro Motion®) LF series mass flow meters should work for this purpose. Their price is likely high, and there are probably people in this forum who have used them. You can ask more questions
The flow rate of the post owner is too low – 25 ml/h, and that’s even in a DN25 pipe; how slow must the flow velocity be? 0.4 ml in just 1 minute – the flow rate can only be measured in micrometers; I think any flow meter would have trouble measuring it. For this type of flow, it’s better to use a weighing device for measurement.
There’s nothing to do about it; it’s just this manufacturing process, so it’s very troublesome.
Scales for online measurement? I wonder if Toledo’s weight loss scale will work
For this type of application, we have used micro positive displacement flow meters as well, with a flow rate of 50 ML per hour; however, their performance was average.
If nothing else works, buy a metering pump or peristaltic pump; such a low flow rate cannot be measured
I feel that the information provided by the original poster is insufficient to develop a plan in a conventional manner; it’s necessary to describe the entire process of measurement or weighing and consider everything as a whole. If it’s a process control system, does the fluid go directly into the reaction vessel or is there a buffer tank? If there is a buffer tank, then volume measurement or weighing can be used for determination, rather than relying solely on flow rates
Ask about Brooks’ mass flow controllers to see if they work
I checked with Toledo, and it seems they can’t do the test either