Air Flow Indicators | McMaster-Carr

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System of Measurement

Airflow Speed

Measures

Differential Pressure

For Use With

Display Type

Meter Style

Air Volume

0 ft³/min to 9,999 ft³/min

0 ft³/min to 99,999 ft³/min

0 ft³/min to 999,900 ft³/min

0 ft³/min to 999,999 ft³/min

0 ft³/min to 1,270,000 ft³/min

0 ft³/min to 1,907,000 ft³/min

Connects To

Form

Maximum Speed

3,000 fpm to 3,999 fpm

4,000 fpm to 5,999 fpm

6,000 fpm to 9,999 fpm

10,000 fpm or greater

Indicator Color

Data Connection

Maximum Temperature

Maximum Pressure

REACH

RoHS

Compliant with Exemptions

Indicator Type

Height

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

Smoke Volume

Material

DFARS Specialty Metals

Fitting Connection

Minimum Temperature

42 Products

Pressure Indicators

Window

Indicator,

Panel Mount

These pressure indicators display a green color when the pressure of your compressed air line reaches 15 psi.

Window Indicator—Indicators with window allow for easy viewing of indicating color.

Panel Mount—Panel-mount indicators mount through a hole in your wall, tank, or panel and secure with a nut.

Indicator Type	Mount Type	Pipe Size	Thread Type	Gender	For Panel Cutout Dia.	Max. Pressure, psi	Temp. Range, ° F	Ht.	Material	Window Material		Each
Window	Panel	1/8	NPT	Female	7/8"	110	25 to 140	2 1/2"	Aluminum	Acrylic Plastic	1249K11	000000

Airflow Meters


Liquid Meter	Swinging-Vane Meter

Measure airflow velocity in ducts, blowers, and ventilation systems with these meters.

Liquid Meter—For high-velocity ducts, blowers, and industrial ventilation systems.

Swinging-Vane Meter—For low-velocity airflow, such as in spray booths and exhaust hoods.

		Overall
	Airflow Speed, fpm	Ht.	Wd.	Dp.	Fitting Connection	Mounting Fasteners Included	Mounting Hole Dia.	Includes		Each
Liquid Meter



		0 to 7,000	6"	7 1/2"	1 1/4"	Barbed	Yes	—	8-ft. Lg. Tubing, Red Indicating Liquid	3974K3	0000000


		Swinging-Vane Meter



				30 to 400	3 7/8"	3 13/16"	1 9/16"	—	No	3/16"	Spare Vane, Steel Mounting Bracket	4075K61	00000

Replacements for Airflow Meters


Replacement Vanes	4075K74	Pkg. of 2	000000
Replacement Liquid	3974K7	Each	00000

Remote-Reading Airflow/Temperature Meters

With a probe on a cord, these meters access hard-to-reach places in duct. They display airflow and temperature simultaneously and can show airflow measurements on multiple scales, such as fpm, mph, and knots. Also known as anemometers.

Fan

Image of Product. Front orientation. Airflow Meters. Remote-Reading Airflow/Temperature Meters, Fan.

Fan meters are also known as vane meters. Those with a built-in surface temperature thermometer also measure the temperature of hard-to-reach surfaces.

3.5 mm Audio Connection—Meters with a 3.5 mm audio data connection can transmit data through a USB connection using a USB adapter cord (sold separately, except for Style C).

Standard SD Card Connection—Meters with an SD card data connection store timestamped readings on an SD card in Excel format, for easy datalogging and PC transfer.

					Overall
	Airflow Speed	Temperature Range	Display Type	Max. Air Volume, ft³/min	Ht.	Wd.	Dp.	Probe Cable Lg., ft.	Data Connection	Batteries Included	Includes		Each
Measures Airflow and Temperature



		60 to 6,900 fpm 0.7 to 78.2 mph 0.6 to 68 kn 0.4 to 35 m/s 1 to 126 kph	32° to 158° F 0° to 70° C	Digital	—	7 3/16"	2 7/8"	1 7/8"	3	Standard SD Card	Yes	Carrying Case	4120K104	0000000


		Measures Airflow, Temperature, and Air Volume



				80 to 5,906 fpm 0.9 to 67.2 mph 0.8 to 58.3 kn 0.4 to 30 m/s 1.4 to 108 kph	14° to 140° F -10° to 60° C	Digital	9,999	7"	2 7/8"	1 5/16"	4	—	Yes	Carrying Case	4120K102	000000


				100 to 6,800 fpm 1.14 to 70 mph 1 to 60 kn 0.5 to 30 m/s 1.83 to 125 kph	32° to 175° F 0° to 80° C	Digital	999,900	7"	2 15/16"	1 5/16"	3	3.5 mm Audio	Yes	Carrying Case	4120K35	000000


				Measures Airflow, Temperature, and Air Volume, —With Calibration Certificate Traceable to NIST



						80 to 5,906 fpm 0.9 to 67.2 mph 0.8 to 58.3 kn 0.4 to 30 m/s 1.4 to 108 kph	14° to 140° F -10° to 60° C	Digital	9,999	7"	2 7/8"	1 5/16"	4	—	Yes	Carrying Case	4120K109	000000

Fan—Built-In Surface Temperature Thermometer

Image of Product. Front orientation. Contains Annotated. Airflow Meters. Remote-Reading Airflow/Temperature Meters, Fan—Built-In Surface Temperature Thermometer.

Fan meters are also known as vane meters. Those with a built-in surface temperature thermometer also measure the temperature of hard-to-reach surfaces.

					Overall
	Airflow Speed	Temperature Range	Display Type	Max. Air Volume, ft³/min	Ht.	Wd.	Dp.	Probe Cable Lg., ft.	Batteries Included	Includes		Each
Measures Airflow, Temperature, and Air Volume



		80 to 5,906 fpm 0.9 to 67.2 mph 0.8 to 58.3 kn 0.4 to 30 m/s 1.4 to 108 kph	14° to 140° F -10° to 60° C	Digital	999,999	7"	2 7/8"	1 5/16"	4	Yes	Carrying Case	4120K103	0000000

Mini Fan—Fan in Probe Tip

Mini fan meters have a fan at the end of a telescoping probe. You can also use them to measure humidity.

3.5 mm Audio Connection—Meters with a 3.5 mm audio data connection can transmit data through a USB connection using a USB adapter cord (sold separately, except for Style C).

						Overall			Probe
	Airflow Speed	RH	Temperature Range	Display Type	Max. Air Volume, ft³/min	Ht.	Wd.	Dp.	Dia.	Cable Lg., ft.	Max. Probe Extension, ft.	Data Connection	Batteries Included	Includes		Each
Measures Airflow, Temperature, Relative Humidity, and Air Volume



		100 to 3,940 fpm 0.5 to 20 m/s	0% to 100%	-4° to 140° F -20° to 60° C	Digital	99,999	6 11/16"	3"	1 11/16"	23/32"	3	3	3.5 mm Audio	Yes	3 ft. Long USB Adapter Cord, Carrying Case, Data-Recording Software	4120K105	0000000

USB Cords

		Each
USB Adapter Cords for Meters with 3.5 mm Audio Connection	4120K67	000000

Pitot Tube

Pilot tube meters measure a wider airflow range than other meters. They also measure differential pressure.

Mini USB-B Connection—Meters with a mini-USB and micro-USB connection type transmit data to your PC through the included cable.

						Overall			Probe
	Airflow Speed	Temperature Range	Display Type	Pressure Differential Range, psi	Max. Air Volume, ft³/min	Ht.	Wd.	Dp.	Dia.	Cable Lg., ft.	Data Connection	Batteries Included	Includes		Each
Measures Airflow, Temperature, Air Volume, and Differential Pressure



		200 to 15,733 fpm 2.25 to 178.66 mph 2 to 154.6 kn 1 to 80 m/s 3.5 to 288 kph	32° to 122° F 0° to 50° C	Digital	0 to 0.73	99,999	8 3/16"	2 7/8"	1 7/8"	11/32"	3	Mini USB-B	Yes	3 ft. Long USB Cord, Carrying Case, Data-Recording Software, Two 3 ft. Long Pitot Tubes	4120K107	0000000

Telescoping Tube

Telescoping tube meters are also known as hot wire meters. They have a probe that telescopes to reach into narrow openings.

3.5 mm Audio Connection—Meters with a 3.5 mm audio data connection can transmit data through a USB connection using a USB adapter cord (sold separately, except for Style C).

Standard SD Card Connection—Meters with an SD card data connection store timestamped readings on an SD card in Excel format, for easy datalogging and PC transfer.

					Overall			Probe
	Airflow Speed	Temperature Range	Display Type	Max. Air Volume, ft³/min	Ht.	Wd.	Dp.	Dia.	Cable Lg., ft.	Max. Probe Extension, ft.	Data Connection	Batteries Included	Includes		Each
Measures Airflow and Temperature



		40 to 3,900 fpm 0.5 to 40 mph 1 to 30 kn 0.2 to 20 m/s 0.7 to 70 kph	32° to 122° F 0° to 50° C	Digital	—	7"	2 15/16"	1 5/16"	1/2"	4	3	3.5 mm Audio	Yes	—	4120K54	0000000


		Measures Airflow and Temperature—With Calibration Certificate Traceable to NIST



				40 to 3,900 fpm 0.5 to 40 mph 1 to 30 kn 0.2 to 20 m/s 0.7 to 70 kph	32° to 122° F 0° to 50° C	Digital	—	7"	2 15/16"	1 5/16"	1/2"	4	3	3.5 mm Audio	Yes	—	4120K111	000000


				Measures Airflow, Temperature, and Air Volume



						40 to 3,300 fpm 0.5 to 30 mph 0.39 to 30 kn 0.2 to 10 m/s 0.7 to 60 kph	32° to 122° F 0° to 50° C	Digital	1,270,000	8"	3"	1 1/2"	1/2"	4	3	3.5 mm Audio	Yes	—	4120K37	000000


						40 to 3,940fpm 0.5 to 45 mph 1 to 31 kn 0.2 to 25 m/s 0.7 to 72 kph	32° to 122° F 0° to 50° C	Digital	1,907,000	7 3/16"	2 7/8"	1 7/8"	1/2"	4	3	Standard SD Card	Yes	Carrying Case	4120K106	000000

USB Cords

		Each
USB Adapter Cords for Meters with 3.5 mm Audio Connection	4120K67	000000

Telescoping Tube—Gooseneck

Telescoping tube meters are also known as hot wire meters. They have a probe that telescopes to reach into narrow openings.

Micro USB-B Connection—Meters with a mini-USB and micro-USB connection type transmit data to your PC through the included cable.

					Overall			Probe
	Airflow Speed	Temperature Range	Display Type	Max. Air Volume, ft³/min	Ht.	Wd.	Dp.	Dia.	Cable Lg., ft.	Max. Probe Extension, ft.	Data Connection	Batteries Included	Includes		Each
Measures Airflow, Temperature, and Air Volume



		60 to 5,904 fpm 0.7 to 67 mph 0.6 to 58.3 kn 0.3 to 30 m/s 1 to 108 kph	32° to 113° F 0° to 45° C	Digital	999,900	7 5/8"	2 11/16"	1 5/16"	1/16"	5.5	2 1/2	Micro USB-B	Yes	3 ft. Long USB Cord, Carrying Case, Data-Recording Software	4120K101	0000000

Smoke Powder


Squeeze-Bottle Release	Squeeze Bulb Sold Separately

Release a burst of floating powder to detect airflow and leaks in HVAC systems, no flame or ignition source required.

Squeeze-Bulb Release—Squeeze-bulb powder creates a denser cloud than squeeze-bottle powder, so you can more clearly see air movement. It requires a rubber squeeze bulb (sold separately) to operate.

Smoke Powder							Squeeze Bulbs
Release Mechanism	No. of Tests	Smoke Range, ft.	Smoke Color	Features		Each		Each
Squeeze Bottle	300 to 400	0.1 to 1.5	White	—	7211N11	000000	———	0
Squeeze Bulb	200 to 300	0.1 to 1	White	Air Inlet	7211N12	00000	7211N13	000000

Smoke Candles


1 Wick	2 Wicks

Light the wick to produce a short burst of smoke to detect airflow and leaks in HVAC systems.

2 Wicks—Use candles with two wicks to extend burning time. Link the wicks with included cable ties. When the first wick burns down, the second lights. Each wick you link adds 3 minutes of burning time.

						Each
Burning Time	Smoke Volume, cu. ft.	Smoke Color	No. of Wicks	Includes		1-11	12-Up
30 sec.	4,000	White	1	—	4093K14	00000	00000
1 min.	8,000	White	1	—	4093K13	00000	0000
3 min.	40,000	White	1	—	4093K12	00000	00000
3 min.	40,000	White	2	Cable Ties	4093K15	00000	00000

Smoke Pens

Produce a continuous trail of visible smoke to detect airflow patterns and pinpoint leaks in HVAC systems. The thin, controlled smoke stream traces subtle air currents and identifies the exact location of small leaks that would otherwise go unnoticed. Each pen includes six replaceable wicks for extended use.

Pens					Replacement Wicks
No. of Wicks Included	Wick Useful Life	Req. Wick Exposure		Each	Pkg. Qty.		Pkg.
6	60 Uses	3/8"	4101T5	000000	6	4101T7	000000

Flow Sights with Barbed Fittings for Water, Oil, Air, and Inert Gas


Ball Indicator	Rotor Indicator

Monitor liquid movement, color, and clarity in tube systems—these sights have barbed fittings that slide into soft plastic and rubber tubing. They have a clear body and an indicator that moves when flow is present, so you can visually confirm flow from a distance.

							Indicator
	For Tube ID	Temp. Range, ° F	End-to-End Lg.	Ht.	Max. Pressure @ Temp.	Direction of Flow	Material	Color	For Use With		Each
Ball Indicator







				Polycarbonate Body

				1/4" to 3/8"	32 to 180	3"	2 1/4"	10 psi @ 70° F	Bottom to Top, Left to Right, Right to Left, Top to Bottom	Nylon	White	Water, Oil, Air, Inert Gas	4218K61	000000


				Rotor Indicator







								PMP Body

								1/4" to 7/16"	32 to 140	3 1/2"	1 9/16"	20 psi @ 70° F	Bottom to Top, Left to Right, Right to Left, Top to Bottom	Polypropylene	Blue	Water, Mineral Oil, Air, Inert Gas	4218K63	00000




										Polystyrene Body

										3/16" to 1/4"	0 to 190	2"	1"	10 psi @ 70° F	Bottom to Top, Left to Right, Right to Left, Top to Bottom	Polystyrene	Blue	Water, Oil, Air, Inert Gas	4218K62	00000

Indoor Environmental Meters

Measure airflow, light, humidity, and temperature with a single, pocket-sized tool. These meters have built-in sensors that can detect multiple environmental factors in your plant or office. This helps you maintain safety compliance and track energy efficiency. A data hold function lets you freeze a measurement on the screen, giving you time to write it down. Additionally, they have the memory to store your high and low measurements. These meters are also known as hygro-thermo-anemometers.

They’re CE marked as compliant with European health, safety, and environmental standards.

Fan

			Light Measurement Range					Overall
	Airflow Speed	For Light Tech.	Footcandles, fc	Lux, lx	RH	Temperature Range	Display Type	Ht.	Wd.	Dp.	Blade Dia.	Batteries Included	Certification		Each
Measures Airflow, Temperature, Light, and Relative Humidity



		80 to 5,905 fpm 0.4 to 25 mm/s 1.45 to 105 kph 0.95 to 65 mph 0.85 to 55 kn	Halogen	0 to 1,855	0 to 15,000	95%	35° to 120° F	LCD	6"	2 1/4"	1 1/4"	1"	Yes	CE Marked	7598N11	0000000

Thermocouple Probes for Light Meters

Thermocouple Type	Cable Lg., ft.	Temp. Range, ° F		Each
K	3	-40 to 482	3581N12	000000

Contaminant-Free Smoke Pellets

Detect airflow and leaks in places with sensitive electronics, such as server rooms. The smoke from these pellets contains only trace amounts of chloride, so it won’t cause electronics to corrode. Ignite them to create a short burst of smoke.

Burning Time	Smoke Volume, cu. ft.	Smoke Color	Pkg. Qty.		Pkg.
45 sec.	150	Gray	10	7357N11	000000
90 sec.	600	Gray	10	7357N12	00000
3 min.	1,200	Gray	5	7357N13	00000
4 min.	2,500	Gray	5	7357N14	00000

Airflow/Temperature Meters

These versatile meters display airflow and one other measurement simultaneously. They’re also known as anemometers or vane meters. They can show airflow measurements on multiple scales, such as fpm, mph, and knots.

Fan

Image of Product. Front orientation. Airflow Meters. Airflow/Temperature Meters, Fan.

4" Diameter Blade—Meters with a 4” blade diameter give you more accurate readings on large HVAC ducts than meters with smaller blades.

						Overall
	Airflow Speed	RH	Temperature Range	Dew Point Range, ° F	Display Type	Ht.	Wd.	Dp.	Blade Dia.	Batteries Included	Includes		Each
Measures Airflow and Temperature



		40 to 5,900 fpm 0.2 to 30 m/s	—	0° to 140° F -20° to 60° C	—	Digital	10 1/2"	4 1/4"	2"	4"	Yes	Carrying Case	1410K102	0000000


		Measures Airflow, Temperature, Relative Humidity, and Dew Point



				40 to 5,900 fpm 0.2 to 30 m/s	1% to 99%	0° to 140° F -20° to 60° C	32 to 122	Digital	10 1/2"	4 1/4"	2"	4"	Yes	Carrying Case	1410K103	000000

Fan—Foldable

Foldable fan meters are small enough to fit in your pocket when closed, then extend to 9” when unfolded.

	Airflow Meters													Replacement Batteries
						Overall
	Airflow Speed	RH	Temperature Range	Dew Point Range, ° F	Display Type	Ht.	Wd.	Dp.	Blade Dia.	Batteries Included	Includes		Each	Pkg. Qty.		Pkg.
Measures Airflow and Temperature



		100 to 5,500 fpm 1.1 to 60 mph 1 to 50 kn 0.5 to 20 m/s 1.8 to 100 kph	—	0° to 122° F -18° to 50° C	—	Digital	5 1/4" to 9"	2 3/4"	3/4"	1"	Yes	Lanyard	1410K14	0000000	1	7701K34	00000


		Measures Airflow, Temperature, Relative Humidity, and Dew Point



				100 to 5,500 fpm 1.1 to 60 mph 1 to 50 kn 0.5 to 20 m/s 1.8 to 100 kph	10% to 95%	0° to 122° F -18° to 50° C	32 to 122	Digital	5 1/4" to 9"	2 3/4"	3/4"	1"	Yes	Lanyard	1410K15	000000	1	7701K34	0000

Fan—Compass, Foldable

Image of Product. Front orientation. Airflow Meters. Airflow/Temperature Meters, Fan Meter, Foldable.

Foldable fan meters are small enough to fit in your pocket when closed, then extend to 9” when unfolded.

	Airflow Meters													Replacement Batteries
						Overall
	Airflow Speed	RH	Temperature Range	Dew Point Range, ° F	Display Type	Ht.	Wd.	Dp.	Blade Dia.	Batteries Included	Includes		Each	Pkg. Qty.		Pkg.
Measures Airflow, Temperature, Relative Humidity, and Dew Point



		60 to 3,900 fpm 0.5 to 40 mph 0.4 to 30 kn 1.1 to 20 m/s 0.8 to 70 kph	1% to 99%	5° to 120° F -15° to 50° C	-4 to 122	Digital	5 1/2" to 9"	1 3/4"	1"	1"	Yes	Lanyard	1410K101	0000000	1	7701K34	00000