Digital Flowmeter™

Digital Flowmeter™

Monitor compressed air usage and waste!

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

What Is The Digital Flowmeter?

Anyone serious about lowering their energy consumption, operating an efficient plant, or optimising their compressed air
system knows that measuring compressed air consumption is the first step toward efficiency. 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 inefficient 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.
Models for 1/2” to 8” iron pipe are available. Each Digital Flowmeter is calibrated for the pipe size to which it is
mounted. 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 clamps are tightened. No cutting,
welding, adjustments, or calibration are ever required. If the unit needs to be removed, block off rings are available.
NEMA type 4 (IP66) meters are available. Please contact us.

How it Works

These flowmeters measure flow by maintaining a temperature differential between the two probes inserted into the
compressed air pipe. One probe is kept warmer than the other and mass flow rate is determined by the amount of heat
required to maintain the temperature differential. The flow rate, in SCFM or m3/hr, is shown on the large four-digit
display. A 4-20 mA output and pulse output permit remote display of the flow value and data collection.

Digital Flowmeter Versions

These four versions of digital flowmeters can be used on Schedule 40 iron pipe, Type L copper pipe, or the nominal pipe
sizes listed under Specifications.

Standard

The original Digital Flowmeter provides accuracy and an easy to read display of current compressed air
consumption, daily consumption, or cumulative consumption. Digital Flowmeter with optional Data Logger shown
left.

Hot Tap

This meter allows for installation under pressure, eliminating the need to isolate and remove pressure from the
pipe it is being installed upon. It incorporates two valves that the probes pass through and a muffler that
collects chips from the drilling process. It takes an equally short amount of installation time as the standard
meters. Available on 2” and 50mm or larger flowmeters.

Pressure Sensing

These Digital Flowmeters monitor pressure and flow. A pressure sensor is mounted between the two flow sensing
probes. The pressure signal is provided as a second milliamp output. The display can be configured to show
pressure or flow. The pressure signal is also available through wired or wireless serial outputs. The pulse
output is replaced with a transistor output configured as a low-pressure alarm when the pressure drops below 50
PSIG. Available on 2” and 50mm or larger flowmeters.

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. Data Loggers can be added to your Digital Flowmeter by adding a suffix to the model number. They can also be ordered separately.

Summing Remote Display

EXAIR’s Summing Remote Display for the Digital Flowmeter has a four-digit LED display that 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. 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. 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 Summing Remote Display is CE and RoHS compliant.

Advantages

All EXAIR Digital Flowmeters are available in three fundamental versions and offer these advantages over traditional flowmeters.

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 are available for sizes 1/2” to 8” in iron pipe
Models are available for sizes 3/4” to 4” in copper pipe
Models are available for sizes 25mm through 101mm in aluminium pipe

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Specifications

Digital Flowmeter Specifications
	Wired	Hot Tap	Pressure Sensing
Accuracy	5% of reading plus 1% of range for flows from 10% to 100% of indicated range at air temperatures between -7ºC to 49ºC (20ºF to 120ºF)	5% of reading, plus 1% of range for flows from 10% to 100% of indicated range at air temperatures between -7ºC to 49ºC (20ºF to 120ºF)	Pressure: +/- 2 PSIG maximum. +/- 0.5 PSIG at 68
Operating Pressure	200 PSIG maximum on Sch. 40 iron and on Type L Copper below 3″. Contact us for other materials and higher pressures	130 PSIG maximum on Sch. 40 iron. Contact us for other materials and higher pressures	200 PSIG maximum on Sch. 40 iron and on Type L Copper below 3″. Contact us for other materials and higher pressures
Input Power	250 mA at 24VDC	250 mA at 24VDC	250 mA at 24VDC
Output Resistance	600 Ohms maximum	600 Ohms maximum	600 Ohms maximum
Wetted Materials	Stainless steel, gold, thermal epoxy, Viton	Stainless steel, gold, thermal epoxy, Viton, PTFE, Aluminium	Stainless steel, gold, thermal epoxy, Viton
Ring Material	Aluminium	Aluminium	Aluminium
Display	Four digit LED	Four digit LED	Four digit LED
Response Time	One second to 63% of change in value at flows above 30% of range	One second to 63% of change in value at flows above 30% of range	One second to 63% of change in value at flows above 30% of range
Pressure Range	N/A	N/A	0-145 PSIG operating range 200 PSIG maximum, 145 PSIG full scale of mA output. For best accuracy, avoid pressures above 145 PSIG
Compliance	CE and RoHS	CE and RoHS	CE and RoHS
Exair Data Logger Software	Download here

Note: For use with compressed air and nitrogen only.

Dimensions**

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

Wired and Pressure Sensing Digital Flowmeters

Small Digital Flowmeter

Small Digital Flowmeter - Schedule 40 Iron Pipe**

Series	Pipe Size	A
Series	Pipe Size	in	mm
9090	½”	3.31	84
9091	¾”	3.49	89
9092	1″	3.87	98
9093	1-1/4″	4.24	108
9094	1-½”	4.62	117

Large Digital Flowmeter

Large Digital Flowmeter - Schedule 40 Iron Pipe**

Series	Pipe Size	A
Series	Pipe Size	in	mm
9095	2”	5.34	136
9096	2-½”	6.09	155
9097	3”	6.71	171
9098	4”	7.71	196
9099	5″	8.84	224
90100	6″	9.84	250
90101	8″	11.84	301

Small Digital Flowmeter - Type L Copper Pipe**

Large Digital Flowmeter - Type L Copper Pipe**

Series	Pipe Size	A
Series	Pipe Size	in	mm
9091UC	3/4″	3.49	89
9092UC	1″	3.68	93
9093UC	1-1/4″	3.87	98
9094UC	1-1/2″	4.24	108

Series	Pipe Size	A
Series	Pipe Size	in	mm
9095CU	2″	5.09	129
9096CU	2-1/2″	5.84	148
9097CU	3″	6.34	161
9098CU	4″	7.34	186

Small Digital Flowmeter - Nominal Pipe**

Large Digital Flowmeter - Nominal Pipe**

Series	Pipe Size	A
Series	Pipe Size	in	mm
91025	25mm	3.49	89
91040	40mm	4.24	108

Series	Pipe Size	A
Series	Pipe Size	in	mm
91050	50mm	5.1	129
91063	63mm	5.6	142
91076	76mm	6.3	161
91101	101mm	7.3	186

Hot Tap Digital Flowmeter

Hot Tap Digital Flowmeter - Schedule 40 Iron Pipe**

Hot Tap Digital Flowmeter -Type L Copper Pipe**

Series	Pipe Size	A
Series	Pipe Size	in	mm
H9095	2″	6.43	163
H9096	2-1/2″	7.20	183
H9097	3″	7.82	199
H9098	4″	8.82	224
H90100	6″	10.95	278
H90101	8″	12.95	329

**If dimensions are critical for mounting, please contact us.

Series	Pipe Size	A
Series	Pipe Size	in	mm
H9095CU	2	6.18	157
H9096CU	2-1/2″	6.95	177
H9097CU	3″	7.45	189
H9098CU	4″	8.45	215
H90100CU	6″	10.45	265

Models

Digital Flowmeter Model Numbering

1. Choose the VERSION of Digital Flowmeter using one of these prefixes:

Version				Prefix
Standard				No Prefix
Hot Tap DFM (available on 2″ and 50mm or larger)				H
Pressure Sensing DFM (available on 2″ and 50mm or larger)				P

2. Choose the SIZE of your compressed air pipe. Flowmeters are for Schedule 40 iron pipe, Type L
copper pipe and nominal pipe.

Size
Model	Pipe Size	Model	Pipe Size
9090	1/2″	9099	5″
9091	3/4″	90100	6″
9092	1″	90101	8″
9093	1-1/4″	90125	for nominal pipe 25mm
9094	1-1/2″	91040	for nominal pipe 40mm
9095	2″	91050	for nominal pipe 50mm
9096	2-1/2″	91063	for nominal pipe 63mm
9097	3″	91076	for nominal pipe 76mm
9098	4″	91101	for nominal pipe 101mm

3. Choose the CONFIGURATION you want by picking one suffix below:

Configuration
Suffix	Configuration
-DG	… Removes Drill Guide
-DAT	… includes Data Logger with Drill Guide
-DG-DAT	… includes Data Logger, removes Drill Guide

CU	… for Copper Pipe with Drill Guide
CU-DG	… for Copper Pipe, removes Drill Guide
CU-DAT	… for Copper Pipe includes Data Logger with Drill Guide
CU-DG-DAT	… for Copper Pipe includes Data Logger, removes Drill Guide

-M3	… Metric (displays m³/hr) with Drill Guide
-M3-DG	… Metric (displays m³/hr) , removes Drill Guide
-M3-DAT	… Metric (displays m³/hr) includes Data Logger with Drill Guide
-M3-DG-DAT	… Metric (displays m³/hr), includes Data Logger, removes Drill Guide

Add specific CONFIGURATION from model numbering tables above.

Digital Flowmeter – Schedule 40 Iron Pipe
Pipe Size	Flow Range*		Standard Model	Metric Display Model	Hot Tap Model	Pressure Sensing Model
Pipe Size	SCFM	m³/hr	Standard Model	Metric Display Model	Hot Tap Model	Pressure Sensing Model
1/2″	1 – 90	2 – 153	9090	—	—	—
3/4″	1 – 120	2 – 204	9091	—	—	—
1″	1 – 160	2 – 272	9092	9092-M3	—	—
1-1/4″	2 – 150	3.6 – 252	9093
1-1/2″	2 – 200	3 – 340	9094	—	—	—
2″	4 – 400	7 – 680	9095	9095-M3	H9095	P9095
2-1/2″	5 – 500	8 – 850	9096	9096-M3	H9096	P9096
3″	12 – 1,200	19.8 – 2,040	9097	—	H9097	P9097
4″	20 – 2,000	34.2 – 3,396	9098	—	H9098	P9098
5″	20 – 2,500	34.2 – 4,248	9099	—	—	P9099
6″	50 – 5,000	85.2 – 8,496	90100	—	H90100	P90100
8″	100 – 6,000	169.8 – 10,194	90101	—	H90101	P90101

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

Digital Flowmeter – Type L Copper Pipe
Pipe Size	Flow Range*		Standard Model	Hot Tap Model	Pressure Sensing Model
Pipe Size	SCFM	m³/hr	Standard Model	Hot Tap Model	Pressure Sensing Model
3/4″	1 – 120	2 – 204	9091CU	—	—
1″	1 – 160	2 – 272	9092CU	—	—
1-1/4″	2 – 150	3.6 – 252	9093CU	—	—
1-1/2″	2 – 200	3 – 342	9094CU	—	—
2″	3 – 350	4.8 – 594	9095CU	H9095CU	P9095CU
2-1/2″	5 – 500	8.4 – 846	9096CU	H9096CU	P9096CU
3″	7 – 700	12 – 1,188	9097CU	H9097CU	P9097CU
4″	15 – 1,500	25 – 2,548	9098CU	H9098CU	P9098CU
6″	50 – 5,000	85 – 8,495	—	H90100CU	—

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

Digital Flowmeter – Nominal Pipe Size – Millimetres
Pipe Size	Range*		Standard Model	Pressure Sensing Model
Pipe Size	SCFM	m³/hr	Standard Model	Pressure Sensing Model
25mm	1 – 150	2 – 254	91025	P91025
40mm	2 – 200	3.6 – 342	91040	P91040
50mm	3 – 350	4.8 – 594	91050	P91050
63mm	5 – 500	8.4 – 846	91063	P91063
76mm	7 – 700	12 – 1,188	91076	P91076
101mm	15 – 1,500	25 – 2548	91101	P91101

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

Data Logger & Summing Remote Display
Model	Description
9147	USB Data Logger for Digital Flow Meters
9150	Summing Remote Display – SCFM LED Readout
9150-M3	Summing Remote Display – M³/hr. LED Readout

Need an EXAIR Drill Guide?

Basic kits for EXAIR’s Digital Flowmeters include all of the components for installation which are: a drill guide to locate the holes for the sensing probes accurately, a drill bit so the holes are the proper size and a hex wrench for installing the pipe clamp securely. If you have purchased a Digital Flowmeter in the past and have these components for the same sized flowmeter, you can order the flowmeter without a drill guide kit by adding the “-DG” suffix to the model number. Please see Model Numbering tables above. Drill Guides can also be ordered separately.

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 Pipe
901281	Drill Guide Kit Only for 2½” Schedule 40 & Type L Copper Pipe
900939	Drill Guide Kit Only for 3″ Schedule 40 & Type L Copper Pipe
900871	Drill Guide Kit Only for 4″ Schedule 40 & Type L Copper Pipe
900872	Drill Guide Kit Only for 5″ Schedule 40 & Type L Copper Pipe
901151	Drill Guide Kit Only for 6″ Schedule 40 & Type L Copper Pipe
902098	Drill Guide Kit Only for 8″ Schedule 40 & Type L Copper Pipe
901994	Drill Guide Kit Only for 2″ and up Aluminium Pipe

What are Block Off Rings?

Block off rings are used to safely cover and seal any holes which were drilled for the Digital Flowmeters. They allow for moving a Digital Flowmeter to multiple locations in your piping system.

Block Off Rings
Model	Description
901327	Block-Off Rings for model 9090 or 9090Z
901328	Block-Off Rings for model 9091 or 9091Z
901329	Block-Off Rings for model 9092, 9092-M3 or 9092Z
901331	Block-Off Rings for model 9094, 9094-M3 or 9094Z
901332	Block-Off Rings for model 9095, 9095-M3 or 9095Z
901333	Block-Off Rings for model 9096, 9096-M3 or 9096Z
901334	Block-Off Rings for model 9097, 9097-M3 or 9097Z
901335	Block-Off Rings for model 9098, 9098-M3 or 9098Z

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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

222.03 KB

USB Data Logger

521.67 KB

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