compressed air flow meter

Through direct thermal dispersion technology, this inline device determines the true mass flow rate of the pneumatic distribution system without needing any pressure or temperature transmitters.

The sensing probe consists of two platinum RTDs that are surrounded by stainless steel protection to prevent effects of moisture and oil aerosols and pressure spikes.

Designed for detecting leakages in pipelines and load balancing in the facilities, this compressor air flow meter reduces the total energy consumption of the entire compressor plant.

With a high turndown ratio and low pressure loss, this device fits easily into the automated management systems.

• Thermal mass flow measurement technology
• No pressure or temperature compensation required
• No moving parts for low maintenance
• High accuracy and repeatability
• Low pressure drop
• Wide turndown ratio
• Instant flow rate and totalizer display
• Microcontroller-based electronics
• 4–20 mA, pulse, and RS485 Modbus output
• Suitable for compressed air monitoring systems

• Fluid: Compressed Air
• Measuring Principle: Thermal Mass Flow
• Flow Range: Up to 2500 CFM
• Operating Temperature: -40°C to 150°C
• Maximum Pressure: Up to 10 Bar
• Accuracy: ±1.5% FSD
• Repeatability: ±0.5% of Reading
• Pressure Drop: Very Low
• Communication: RS485 Modbus
• Power Supply: 24 VDC

Pipeline Insertion & Flow Stabilization
High-pressure air from the compressor system enters the straight pipe run where the meter is installed. The internal housing conditions the incoming air stream, smoothing out sudden velocity spikes and turbulence before the air hits the primary sensing elements.

Dual-Sensor Thermal Sensing
The air stream passes directly over two wetted RTD (Resistance Temperature Detector) probes inserted into the flow path. One probe acts as a passive reference measuring the actual air temperature, while the second probe is an active element held at a precisely controlled higher temperature.

Convective Heat Dissipation
As compressed air molecules sweep past the heated probe, they carry away thermal energy through convective cooling. The faster the air moves—or the denser the compressed air stream is the more heat it absorbs from the sensor surface.

Smart Power Adjustment
To keep the temperature difference between the two probes constant, the internal circuitry immediately adjusts the electrical power sent to the heated sensor. Because heat loss depends directly on gas mass rather than simple volumetric speed, this dynamic power change measures true mass flow without needing separate pressure or temperature compensation.

Digital Conversion & Control Telemetry
The microprocessor translates this electrical power consumption into standardized flow units (such as $Nm^3/hr$ or $SCFM$). An integrated compressor air flow meter transmitter then updates the local display and sends an automated 4–20mA or Modbus signal straight to your facility’s energy management panel for leak detection and air audit tracking.

Electronics & Programming Specifications

• System Programming Method: Configuration adjusted via integrated Membrane Key.
• Power Supply Input Options: 24 VDC Isolated, 230 VAC, 110 VAC main line utility selections.
• Output Signals: 4-20mA (4-wire execution) and Pulse output circuits.
• Digital Communication Architecture: RS 485 MODBUS serial interface protocols.
• System Measurement Accuracy: ±2% of FSD (Full Scale Deflection).
• System Measurement Linearity: ±0.5%.
• System Measurement Repeatability: 0.5%.

Standard Kit Content Accessories

• Standard Package Inclusions: Thermal mass flow meter, Calibration report, User manual, Cable Glands, Compression fitting, Power supply adaptor, Safety cable, and Aluminum rugged case.
• Optional Hardware Add-ons: RS485 to USB converter (on demand) and Inbuilt data logger (on demand).

Get Rid of Expensive Billing Problems: The highly accurate Custody Transfer Turbine Flow Meter provides fiscal-grade precision measurement that safeguards your bottom line from any minute variations of volume in large-scale distribution.

Simplify Heavy Utility Monitoring: Acting as a durable Custody Transfer Flow Meter instrument, the device is fitted with tungsten carbide bearings that help avoid mechanical drift, reducing calibration time of instruments.

Guaranteed Security for Large Distribution Lines: Being one of the Custody Transfer Flow Meters manufacturers, we design advanced double pulse-tracking electronics that eliminate signal loss caused by line vibration.

Effortlessly Generate Transaction Records in Real Time: Reliable and trusted by worldwide Custody transfer flow instrument producers, the heavy duty meter delivers continuous data on mass flow directly to SCADA system.