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Batch Controller Flow Meter: Automated Liquid Dosing and Filling Systems

Quick Answer: A batch controller flow meter system stops flow automatically when a preset volume or mass is reached. This eliminates manual measurement, reduces waste, and delivers repeatable batch fills. For plants filling drums, pails, or reactor vessels, this setup is the most cost-effective way to gain consistency without a full PLC.

How a Batch Controller Works with Your Flow Meter

Most batch controllers read pulse signals from a flow meter and open or close a valve based on the totalized count. You preset a target quantity. The controller counts pulses, compares the running total to the target, and triggers a relay when the batch is complete. Simple two-stage shutoff is common. A fast open valve does most of the fill, then a smaller valve or slower flow trims the last few liters. This avoids overshoot, even with high-speed pumps.

In practice, you wire the flow meter pulse output to the controller input, wire the relay to a solenoid valve or pump contactor, and set your batch size. That is the core loop. Add a 4-20 mA HART output if you want to log flow rate to a recorder or DCS, but the pulse path handles the batch logic.

Why This Matters for Dosing and Filling Operations

Manual batching creates variation. One operator stops the pump a second late, another a second early, and each barrel shifts by half a liter. Multiply that by 500 barrels a day and you lose raw material and time. A batch controller removes that guesswork. It gives you the same shutdown point every time, within the repeatability of your flow meter.

Here is the thing. Many small and mid-sized plants in Southeast Asia, the Middle East, and Latin America do not want a full SCADA system just to fill drums. A batch controller paired with a reliable flow meter costs a fraction of a PLC cabinet. It installs in an hour. Operators push three buttons. That is often the real reason maintenance teams prefer this route.

Best Flow Meter Types for Batch Control (and When to Use Each)

Not every flow meter pairs well with a batch controller. The selection depends on liquid properties, pipe size, and the batch accuracy you need. Silver Automation Instruments supplies the sensor side of this pairing worldwide.

Oval Gear Flow Meters work well for viscous, non-conductive liquids like resin, diesel, edible oil, or paint. They output a high-resolution pulse per volume directly from mechanical rotation. On a DN25 oval gear meter with a flow range of 2 to 30 L/min, you can batch 20-liter pails with repeatability under 0.5 percent. A batch controller counts pulses cleanly because the signal is strong and does not need external excitation. For a lubricant blending plant in Vietnam, we supplied a Silver oval gear meter with a batch controller that fills 200-liter drums in under 70 seconds. The operator sets 200.0 liters, presses start, and walks away.

Coriolis Mass Flow Meters give you mass-based batching, not volume. This matters when temperature swings change liquid density. A chemical dosing room in Saudi Arabia uses our Silver Coriolis meter with a batch controller to charge 50 kg of solvent into a reactor. The controller counts pulse or mA values mapped to mass, and the final mass per batch stays within 0.2 percent of target regardless of a 15 deg C shift during the day. You get direct kilograms or tonnes on the display, not liters at reference temperature. If your recipe is in kg, skip the density conversion.

Electromagnetic Flow Meters suit water-based dosing in wastewater treatment and food processing. For a sodium hypochlorite dosing skid in a Philippine water plant, we paired a Silver magmeter with a batch controller. The meter outputs a frequency signal proportional to flow veloc