KMC-M Multi-Path Gas Ultrasonic Flow Meter

Working principle of KMC-M mono channel gas ultrasonic flow meter

The working principle of the KMC-M monophonic gas ultrasonic flow meter is based on the method of measuring the propagation time difference between the downstream and upstream ultrasonic pulses of the gas.The measured time difference proportional to the flow rate is converted into the gas volume flow rate.

The KMC-M monochannel gas ultrasonic flow meter includes an electroacoustic transducer (hereinafter referred to as PEA), a measurement part and a signal processing device.

The measurement section can be composed of the KMC-M monochannel gas ultrasonic flow meter body, or a section of the existing pipeline (cut-through design).The signal processing unit generates the transmitter supplied to the KMC-M monophonic gas ultrasonic flow meter and produces a standard output signal transmitting gas flow and volume under operating conditions.

In versions with a built-in calculator, the signal processing device also receives current signals from temperature and pressure sensors and calculates the flow rate, heat value under standard conditions and records the readings in a log.

Depending on the version, the flow meter may include a flow preparation device:

• Straight line segment, including where temperature and pressure sensors are mounted

• A flow regulator that eliminates the influence of local resistance

• Gas purification units - recommended for contaminated gases

• Silencer - Installation of a flow meter after a pressure regulator operating under critical gas flow conditions is recommended.

      Factory calibration and verification of the flow meter can be carried out by incorporating all components contained in the flow meter into the measuring line (higher accuracy versions on special order).

 Application fields

Flow meters with built-in flow computer, equipped with temperature and pressure sensors, allow the method of measuring volumetric flow to be implemented under standard conditions.All components of the complex operate in the full range of operating conditions (-50.. + 50 °С, IP67).

Advantages compared to other types of flow meters

Compared with turbine, differential and mechanical flow meter:

• Wider dynamic range: from 1:100 to 1:400 (4% level)

• No flow obstruction: no possibility of pressure loss and damage to flow meter components;

• Lack of moving parts and need for maintenance

• Bidirectional flow measurement;

Compared to Coriolis mass flow meters

• Measures at low pressure and flow;

• Ability to handle contaminated gases.