CS Instruments – CMM 500

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Reference flow meter for compressors and compressed air billing. Venturi technology according to ISO 5167-3 ensures high accuracy, wide measuring range, and minimal pressure drop.

Measuring principle Venturi, differential pressure (ISO 5167-3)
Accuracy up to ±0.5% of reading
Measuring range 1 : 130
Response time < 1 s
Media temperature -20 … +100 °C
Operating pressure up to 16 bar(g) (optional 30 / 100 bar)
Power supply 18 … 36 VDC
Outputs / communication 4–20 mA, pulse, Modbus RTU (optional Ethernet/PoE, M-Bus)
Measuring principle Venturi, differential pressure (ISO 5167-3)
Accuracy up to ±0.5% of reading
Measuring range 1 : 130
Response time < 1 s
Media temperature -20 … +100 °C
Operating pressure up to 16 bar(g) (optional 30 / 100 bar)
Power supply 18 … 36 VDC
Outputs / communication 4–20 mA, pulse, Modbus RTU (optional Ethernet/PoE, M-Bus)
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Standard equipment 1 · Options 4 · Accessories 5
  • CMM 500 base versionReference Venturi flow meter for compressed air and gases. Final configuration is defined by measurement section, flanges, display, and outputs.
ParameterDN 50DN 80DN 100DN 125DN 150DN 200
Measured mediumAir, gases
Measuring principleDifferential pressure, Venturi
Measuring range1 : 130
Accuracy (0.2 Qmax to Qmax) [%]± 0.5
Response time (t99) [s]< 1
Medium temperature [°C]-20 … +100
Operating pressure [bar(g)]max. 16 (optional 30 / 100)
Ambient temperature [°C]-30 … +70
Power supply [VDC]18 … 36
Signal outputs (standard)RS-485 (Modbus RTU), 4–20 mA, pulse output
Signal outputs (optional)Ethernet interface, M-Bus

Reference-grade measurement accuracy

High-accuracy Venturi reference flow meter according to ISO 5167-3, with accuracy up to ±0.5% of reading.

Very wide measuring range

A 1:130 measuring range enables reliable measurement of both low and very high flow rates.

Wet and dry compressed air measurement

Suitable for wet compressed air directly downstream of compressors, as well as dry air consumption measurement.

Minimal pressure drop

Venturi technology provides very low pressure drop, reducing system losses and improving energy efficiency.

No moving parts

No moving mechanical parts means no bearing wear and less sensitivity to particles.

Service during operation

Valve block design enables zero adjustment, condensate drain, and calibration sensor replacement under pressure.

Manufacturing and compressed air measurement

Manufacturing industry

Compressed air

Accurate monitoring of compressed air delivery and consumption for cost optimization and internal consumption billing.

Automotive industry flow measurement

Automotive industry

High accuracy

Reliable flow measurement for compressor station monitoring, energy analysis, and consistent production quality.

Energy monitoring

Energy management

Efficiency

Reference flow measurement for audits, leak-loss reduction, and compressed air system optimization.

Contact

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Pod lipami 4 · 1370 Logatec, Slovenija

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