Pitot Tube Flow Meter
Our catalogue contains a variety of Pitot tube pressure meters, each with its own set of features. Pitot tube air flow meters are based on the traditional Prandtl tube, which includes a Pitot tube for total pressure measurement and a sensor for static pressure measurement. Anemometers, which are closely linked to manometers, were invented to measure air flow. Pitot tube air flow meters have an advantage over other techniques of measurement in that they have a relatively tiny aperture above the tube barrier at the most critical distance, allowing for fast readings of air flow. They’re also effective in high-temperature and high-wind conditions.
Pitot Tube For Air Flow Measurement
To obtain the velocity pressure from which air velocity may be calculated, a Pitot tube detects total pressure and static pressure. The tip of the Pitot Tube Air Flow Meter is directed toward the airflow as it is put into the duct.

PTF520 Pitot tube flowmeter

PTF520 pitot tube flowmeter air flow meter for wet or dry compressed air, Nitrogen and non-corrosive gas flow measurement. Integral temperature and pressure compensation, to deliver the reading of standard flow, temperature and pressure at same time. Analysis of compressed air costs by simultaneously measuring energy consumption and compressor output.

Advantages at a glance:

  • No need for initial off-set
  • Wet or dry air flow measurement
  • Bi-direction flow measurement
  • Flow, total flow consumption, temperature and pressure
  • pulse, 4~20mA output, RS485 (Modbus-RTU)
  • Bluetooth app operating interface support
PTF520 for compressed air


  • FAD measurement of compressors
  • Compressed air auditing system
  • Compressed air efficiency measurement and monitoring
  • Comply with auditing or permanent monitoring service required
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PTF520 New generation pitot tube flowmeter

– for wet, dry compressed air measurement

compressed air flow meter PTF520 Pitot Tube Flow Meter

Special features

  • No need to set 0 point

  • Bid-directional flow measurement

  • Cellphone APP for reading and setting

  • Measures flow rate, temperature, pressure, FAD measurement available

  • Insertion and inline installation

  • Self-diagnose and remote diagnose function to provide with best support

  • For both dry and wet air measurement, possible for measuring compressed air at output of compressor

Specification & drawing

PTF520 air flow meter drawing

Medium Air and non-corrosive gas
Pipe size 1~12”(DN25~DN300)
Ambient temperature -20~60°C
Atmosphare pressure 86~106Kpa
Ambient humidity 5~100%
Process connection G 1/2” ball valve
Pressure rating 10 barG
Fluid temeprature -20~150°C
Wet parts material 304ss
Parameter display Flow rate, temperature, pressure
Power supply 13.5~32VDC, 150mA max
Analog 4 wire passive 4~20mA
Communication RS485@Modbus-RTU, Bluetooth
Accuracy 1.5%RD ± 0.3%FS
Repeatability ± 0.5%RD
Response time 1 second

Flow range of PTF520 in compressed air measurement

Flow range of PTF520 in compressed air measurement

Setting friendly – Users can enter the sensor setting via button or Comate app 

  • Read & Set on Screen

PTF520 has integral TFT 2” High Resolution display with two capacitive key for setting

PTF520 pitot tube flow meter display

  • Read & Set on via COMATE APP

PTF520 implement a cellphone setting system. Users can install COMATE APP on their cellphone or tablet and use the APP to connect with a PTF520 flow meter to read or set the flow meter.
This APP also support a remote diagnose function. Whenever there is anything wrong with the flow meter, customer can ask for a remote diagnose support. When this function is working, COMATE engineer back in office can remotely check the setting of the meter, and the signal of sensor, to provide users with most accurate trouble shooting advise.
COMATE APP has made the using of the product simple and efficient .

PTF520 pitot tube flow meter operating

1 Process Connection D Insertion (G 1/2) ,anti-ejection design with ball valve Standard
2 Probe Length 1 255mm, 11mm dia (1“~4″ or DN25~DN100) Option
2 320mm, 11mm dia (1“~8″ or DN25~DN200) Option
3 395mm, 11mm dia (1“~12″ or DN25~DN300) Standard
3 Probe Material 1 304 SS Standard
4 Socket material 1 Carbon steel Option
2 304 SS Standard
3 316 SS Option
5 Transmitter T Integral Standard
6 Pressure Rating 1 10 Bar G Standard
2 150 KpaA Option
7 Display and output 1 Local display, RS485, Bluetooth Standard
2 Local display, 4wire 4~20mA, RS485, Bluetooth Option
8 Power supply 1 13.5~42VDC Standard
N 13.5~42VDC with 24VDC to AC power concerter Option
9 Pipe size XXX please use 3 digit pipe size, such as DN50=050, DN200=200 XXX


The tip of the Pitot tube is directed toward the airflow as it is put into the duct. The manometer’s positive port is connected to the total pressure port (Pt), while the negative port is attached to the static pressure port (Ps). After then, the manometer will show velocity pressure, which may be translated to velocity.

A pitot (/ˈpiːtoʊ/ PEE-toh) tube, also known as pitot probe, is a flow measurement device used to measure fluid flow velocity. It is widely used to determine the airspeed of an aircraft, air and gas flow velocities in certain industrial applications

You can calculate the air volume passing past a point in a duct per unit of time by multiplying air velocity by the cross section area of the duct. In most cases, volume flow is measured in cubic feet per minute (CFM).

The average air speed in the duct is determined using an anemometer, a test tool that monitors air velocity. The airflow passing through the duct is then calculated by multiplying the average feet per minute by the duct’s area in square feet. Traverse the exhaust duct’s airflow.