Digital Flowmeter™

Monitor compressed air use and waste!

EXAIR’s Digital Flowmeter family is available in many sizes.

What Is The Digital Flowmeter?

EXAIR’s Digital Flowmeter is the easy way to monitor compressed air consumption and waste! The digital display shows the exact amount of compressed air being used, making it easy to identify costly leaks or insufficient air products. Many companies install the Digital Flowmeter on each major leg of their air distribution system to constantly monitor and benchmark compressed air usage.

The Digital Flowmeter has an LED display that directly indicates the SCFM or m3/hr volume of airflow through that pipe. Each Digital Flowmeter is calibrated for the specific pipe size to which it is mounted. Models are available for measuring air flow in SCFM on Schedule 40 Iron pipe from ½” to 6” diameter. Airflow meters for Copper pipe up to 4” and Aluminium pipe up to 101mm are also available.

The Digital Flowmeter is designed for permanent or temporary mounting to the pipe. It requires the user to drill two small holes through the pipe using the included drill bit and locating fixture. The two flow sensing probes of the flowmeter are inserted in these holes. The unit seals to the pipe once the two clamps are tightened. No cutting, welding, adjustments or calibration are ever required. If the unit needs to be removed, blocking rings are available. NEMA Type 4 (IP66) meters are available. Please contact us.

USB Data Logger

EXAIR’s award-winning Model 9147 USB Data Logger connects directly to your Digital Flowmeter and is simple to use. Download the software to configure the Data Logger to record your flow rate from once a second (about nine hours of data) up to once every 12 hours (over 2 years!).
When the Data Logger is removed from the Digital Flowmeter and plugged into a computer, the data can be viewed in the software or exported directly into Microsoft Excel. The Data Logger is available pre-installed on the Digital Flowmeter.

Summing Remote Display

EXAIR’s Summing Remote Display for the Digital Flowmeter makes it easy to monitor compressed air consumption from a convenient location. With the push of a button, the display cycles to show the current air consumption, usage for the previous 24 hours, and total cumulative usage. Regular monitoring of the air usage of a machine, process or department makes it possible to save thousands of dollars per year in compressed air waste by identifying the costly leaks or inefficient air products.

The Digital Flowmeter (sold separately) has a four-digit LED display that directly indicates the SCFM (standard cubic feet per minute) or m3/hr (cubic metres per hour) of airflow through the pipe it is mounted upon. The Summing Remote Display shows that flow measurement, the daily and cumulative usage and is frequently used when the Digital Flowmeter is in an obscure, hard to read location. The accuracy of the displayed measurement is within 5% of the reading when the air temperature is 4ºC to 49ºC (40ºF to 120ºF) and air pressure is between 2 to 10 BAR (30 to 140 PSIG). No adjustments or calibration are ever required.

The Summing Remote Display is prewired with 15.2m (50-foot) of cable and is powered by the Digital Flowmeter.


  • Easy to install – No moving parts
  • Summing Remote Display and Data Logger available
  • Optional RS-485 output serial communication board available
  • Sensitive at low flows
  • No calibration or setup required
  • Includes all components for installation
  • Models from 1/2” to 4″ Schedule 40 Iron Pipe
  • Models are available for sizes 1/2” to 6” in iron pipe
  • Models from 1/2” to 6″ Schedule 40 Iron Pipe
  • Models are available for sizes 3/4” to 4” in copper pipe
  • Models are available for sizes 25mm to 101mm Aluminium Pipe


Specifications for Digital Flowmeter
Accuracy 5% of reading, plus 1% of full scale for air temperatures between 4ºC to 49ºC (40ºF to 120ºF).
Operating Pressure 30 to 140 PSIG for best accuracy – 200 PSIG max.
Input Power 250 mA at 24 VDC / Power Adapter included 100-240VAC
Wetted Materials Stainless steel, gold, thermal epoxy and Viton (seal)
Ring Material Aluminium
Display Four-digit LED display
Compliance CE and RoHS
Exair Data Logger Software Download here

Note: For use with compressed air and nitrogen only.


Series Pipe Size A
in mm
9090 ½” 3 76
9091 ¾” 3.25 83
9092 1″ 3.63 92
9094 1-½” 4.38 111
9095 2” 4.88 124
Series Pipe Size A
in mm
9096 2-½” 5.75 146
9097 3” 6.38 162
9098 4” 7.38 187

*If dimensions are critical for mounting, please consult CAA.


Digital Flowmeter
Schedule 40 Iron Pipe Size Range* Digital Flowmeter SCFM Model Digital Flowmeter SCFM with Data Logger Model Digital Flowmeter m3/hr Model Digital Flowmeter m3/hr with Data Logger Model
SCFM m3/hr
1/2″ 1 – 90 2 – 153 9090 9090-DAT 9090-M3 9090-M3-DAT
3/4″ 1 – 120 2 – 204 9091 9091-DAT 9091-M3 9091-M3-DAT
1″ 1 – 160 2 – 272 9092 9092-DAT 9092-M3 9092-M3-DAT
1-1/2″ 2 – 200 3 – 340 9094 9094-DAT 9094-M3 9094-M3-DAT
2″ 4 – 400 7 – 680 9095 9095-DAT 9095-M3 9095-M3-DAT
2-1/2″ 5 – 500 8 – 850 9096 9096-DAT 9096-M3 9096-M3-DAT
3″ 12 – 1,200 20 – 2,039 9097 9097-DAT 9097-M3 9097-M3-DAT
4″ 20 – 2,000 34 – 3,398 9098 9098-DAT 9098-M3 9098-M3-DAT

*Calibrated range. Usable ranger higher. Please consult CAA.

Data Logger & Summing Remote Display
Model Description
9147 USB Data Logger for Digital Flow Meters
9150 Summing Remote Display – SCFM
9150-M3 Summing Remote Display – M3/hr.
Drill Guide Kits
Model Description
900817 Drill Guide Kit Only for 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2″ Schedule 40 & Type L Copper
901281 Drill Guide Kit Only for 2½” Schedule 40 & Type L Copper
900939 Drill Guide Kit Only for 3″ Schedule 40 & Type L Copper
900871 Drill Guide Kit Only for 4″ Schedule 40 & Type L Copper
900872 Drill Guide Kit Only for 5″ Schedule 40 & Type L Copper
901151 Drill Guide Kit Only for 6″ Schedule 40 & Type L Copper
Block Off Rings
Model Description
901327 Block-Off Rings for model 9090 or 9090-M3
901328 Block-Off Rings for model 9091 or 9091-M3
901329 Block-Off Rings for model 9092 or 9092-M3
901331 Block-Off Rings for model 9094 or 9094-M3
901332 Block-Off Rings for model 9095 or 9095-M3
901333 Block-Off Rings for model 9096 or 9096-M3
901334 Block-Off Rings for model 9097 or 9097-M3
901335 Block-Off Rings for model 9098 or 9098-M3

Installation and Maintenance Guides

Digital Flowmeter

255.75 KB

Hot Tap Digital Flowmeter

560.43 KB

Pressure Sensing Digital Flowmeter

188.76 KB

Summing Remote Display

83.62 KB

USB Data Logger

521.67 KB

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