Selection of low-flow measuring instruments for DN15
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A DN15 pipe, with desalinated water as the fluid, and a flow rate of 0~0.4 m3/h. We originally used a turbine, but found that the flow rate was too low, so we had to replace it with another type of meter. What on earth can be used at such low flow rates? Please give some suggestions.
Well, it has an analog output of 4–20mA, and it’s a horizontal type. There’s no need to even mention water meters, as they don’t have any analog output.
If high precision is not required, a rotameter can be used； If high precision is required, a capacitive electromagnetic flowmeter can be used; Yokogawa Motor offers such electromagnetic flowmeters for measuring low-conductivity media, in the CA series.
The orifice plate of a differential pressure flow meter can effectively solve this problem.
For low flow rates in small-diameter tubes of DN15, with deionized water as the fluid to be measured, a pipe-type ultrasonic flow meter can be used, and it yields good results.
A orifice plate flow meter will work; a differential pressure transmitter might be necessary. For specific inquiries, contact Wei at 15900551823