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50 g/h Flow Meter for Industrial Process Line Management
Quick Answer
If your process line requires dosing additives, catalysts, or fragrances at 50 g/h, a standard flow meter will not work. Silver Automation Instruments supplies dedicated Coriolis mass flow meters with DN1, DN2, and DN3 tube sizes that measure mass flow directly at these ultra-low rates. The meters output 4-20 mA HART and RS485 Modbus signals, feeding your PLC or dosing controller with updates every 50 ms. This eliminates batch inconsistency caused by pump drift or valve hysteresis.
When Standard Meters Fail at 50 g/h
Most electromagnetic and vortex meters require a minimum flow velocity to generate a clean signal. At 50 g/h, the velocity inside a DN15 pipe is roughly 0.0002 m/s for water. That is below the sensitivity threshold of many instruments. Here is the thing: you cannot simply install a smaller pipe and hope for better results. The Reynolds number drops, the velocity profile flattens, and accuracy vanishes. Silver Instruments Coriolis meters for low flow do not depend on velocity. They measure the Coriolis effect induced by the mass moving through oscillating tubes. With a DN2 tube, the nominal flow range spans 0.02 to 20 kg/h. A 50 g/h setpoint sits at about 2.5 percent of the full scale. This gives enough signal-to-noise ratio for stable readings, provided the zero calibration is done correctly.
Real Process Line Management at 50 g/h
In industrial process lines, managing a 50 g/h stream is not just about the meter. It is about integrating the signal into a dosing controller or DCS without latency. Our Coriolis transmitter processes mass flow, density, and temperature in a single sweep. The analog output updates every 50 ms, and the RS485 bus reports at up to 100 Hz. You can set a density alarm to detect wrong solvent ratios. For example, if your carrier is ethanol and the density deviates by more than 0.005 g/cm³, the meter sends a logic signal to stop the pump. We have seen this prevent off-spec batches in paint and ink factories many times.
A Customer Case from Southeast Asia
Last year, a flavor house in Ho Chi Minh City ordered two SILVER-CMF-DN2 meters. They dilute a grapefruit essence with ethanol and inject it at 50 g/h into a continuous blending line. Before switching to Coriolis, they used a peristaltic pump with no feedback. Their QC team found taste deviation in every third batch. After installing our meter with 4-20 mA HART to a Siemens PLC, the dosing accuracy stayed within plus or minus 0.5 percent of setpoint. They also logged density trends on a Silver Instruments paperless recorder. The plant manager told us the payback period was less than four months, thanks to reduced rework and concentrate waste.
Key Specifications for 50 g/h Meters
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Frequently Asked Questions
Can the meter handle liquids with viscosity above 200 cP?Yes, the Coriolis design handles viscosities up to 2000 cP without special correction. For polymer melts or heavy fuel oil above that range, we add a heating jacket to the sensor body.
Does the low-flow meter need long straight pipe runs?
No. Coriolis meters are insensitive to flow profile disturbances. You can mount the meter directly after an elbow, a reducer, or a control valve. This saves valuable space on injection skids and mixing panels.
What about air bubbles in a 50 g/h stream?
At 50 g/h, even a small bubble can cause a flow spike. Our transmitter includes a two-phase flow detection algorithm. If the drive gain exceeds a set threshold, the meter flags a warning and can hold the last valid output. This prevents the dosing pump from over-reacting to slug flow.
Is ATEX Zone 1 certification available for these small meters?
Yes. We supply intrinsically safe (Ex ia) and flameproof (Ex d) versions for ATEX Zone 1. The certificate is issued by a notified body such as SGS or TÜV. Let us know your gas group and temperature class when you request a quote.
Can I use the meter for gas flow at equivalent mass rates?
You can, but the sensitivity drops because of the low density. For gas flow below 100 g/h, we recommend a Silver Instruments thermal mass flow meter instead. The thermal sensor bypasses the density limitation and gives you direct mass flow of air, nitrogen, or methane with a DN4 probe.
Send Your Process Data for a 50 g/h Meter Proposal
We need just four things to recommend the correct flow meter: your fluid name, operating temperature in degrees Celsius, pressure in bar, and the pipe connection type. Send those details along with your target flow range to [email protected]. We also welcome calls or WhatsApp messages for urgent projects. Our application engineers will return a dimensional drawing, a data sheet, and a price within one working day. Visit https://flow-meter.com.au to see the full low-flow Coriolis series.
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