MAO-125/250 Flow Meter

MAO-125/250 series: compact flow measurement with triple output

The MAO-125/250 flow meter combines a robust mechanical design with modern microprocessor technology. Unlike traditional flowmeters, this unit is not damaged by a sudden exceedance of the measuring range (over-ranging). In addition, the meter is available in an all-Teflon® version, making it the ideal choice for dosing corrosive chemicals.

Why the MAO-125/250 series excels

Thanks to the unique "single moving part" principle, this meter offers advantages you will not find with other measuring techniques. Engineers frequently use the MAO-125/250 flow meter because of:

• No bearings or seals: the absence of bearings and internal seals eliminates the most common failure mechanisms and leaks.
• Insensitive to over-ranging: the meter remains undamaged, even if the flow temporarily rises far above the maximum capacity.
• Triple signal output: the meter simultaneously provides an analogue (0-5 VDC), digital (Hz) and current loop (4-20 mA) signal.
• Low flow measurement: specially calibrated for applications where standard meters often become inaccurate.
• Inline metering: the compact design allows easy integration into existing pipework.

Operation and technology

The heart of the MAO-125/250 flow meter is a magnetic piston that is displaced by the liquid flow:

1. Proportional displacement: the liquid displaces the Teflon®-encapsulated piston over a distance exactly proportional to the volumetric flow.
2. Contactless sensor: a transducer outside the liquid path registers the position of the magnet.
3. Microprocessor control: an internal circuit translates this position into the three required outputs. This means you always have real-time data for your process control or material consumption measurement.

Technical specifications MAO-125/250

Applications and installation advice

The MAO-125/250 flow meter is the standard in sectors where precision and continuity come first:

• Wet benches: for exact dosing of liquids in the semiconductor industry.
• Cooling systems: continuous monitoring of coolant flows in critical equipment.
• Corrosive chemicals: safe measurement of aggressive media thanks to Teflon® wetted parts.
• Process control: accurate control of liquid flows in industrial installations.

Note for installation: always mount the meter vertically with the inlet port facing down and the outlet horizontal. For stable measurement, a straight pipe of 10x the inner diameter upstream is also required. We also recommend using a 10 micron filter.