Quick Clamp Gauges | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	For Tube OD For Tube OD

	Connection Style Connection Style	Show

Quick Clamp

	Connection Style Connection Style	Hide

	Scale Scale

	Connection Location Connection Location

	Bottom		Center Back

	Dial Type Dial Type


Dry	Liquid Filled

	Display Type Display Type


Dial	Digital

	Dial Diameter Dial Diameter

2 1/2"

3 1/2"

	Measures Measures

Pressure

Vacuum

	For Use With For Use With

	Connection Material Connection Material

316 Stainless Steel

304 Stainless Steel

	Environment Environment

	Case Material Case Material

Stainless Steel

Plastic

	Connection Type Connection Type

	Tube

	Connection Flange OD Connection Flange OD

	Maximum Process Temperature Maximum Process Temperature

140° F

250° F

	Scale Type Scale Type

	Single

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Minimum Process Temperature Minimum Process Temperature

0° F

	Accuracy Scale Accuracy Scale

Full Scale

	Minimum Environment Temperature Minimum Environment Temperature

0° F

40° F

	Maximum Environment Temperature Maximum Environment Temperature

100° F

150° F

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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42 Products

About Pressure Gauges

About Pipe Size

About Flowmeters and Totalizers

Flowmeters measure the rate of flow for a liquid or a gas. Totalizers measure the cumulative flow volume. Flowmeter/totalizers display both the flow rate and the cumulative flow volume.

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Bottom Connection

A glycerin-filled dial reduces needle flutter for precise readings in high-vibration food-processing applications. Gauges are 3-A certified for sanitary design in dairy and other food-processing environments. Use them with pumps, filters, regulators, and in process lines to measure and display pressures.

For technical drawings and 3-D models, click on a part number.

304 Stainless Steel Case with 316 Stainless Steel Connection—Single Scale (psi)

For Use With: Food, Dairy
Accuracy:
Up to 60 psi: ±2% Full Scale (Not Graded)
100 psi and above: ±1.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, psi	Numeric Increments, psi	Graduation Marks, psi
0 to 30	5	0.5
0 to 60	5	1
0 to 100	10	1
0 to 200	20	2
0 to 300	30	5
0 to 400	50	5
0 to 600	50	10

						Bottom Connection
Dial Diameter	For Tube OD	Environment Temp. Range, °F	Process Temp. Range, °F	Specifications Met	Mounting Orientation	Tube Connection Type	Connection Flange OD		Each
2 1/2"	1 1/2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	1.96"	0000000	0000000
2 1/2"	2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	2.52"	0000000	000000
3 1/2"	1 1/2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	1.96"	0000000	000000
3 1/2"	2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	2.52"	0000000	000000

Food and Beverage Pressure Gauges

Bottom Connection

These gauges are 3-A certified for sanitary design in dairy and other food processing applications. Use them with pumps, filters, regulators, and in process lines to measure and display pressures.

For technical drawings and 3-D models, click on a part number.

304 Stainless Steel Case with 316 Stainless Steel Connection—Single Scale (psi)

For Use With: Food, Dairy
Accuracy:
Up to 60 psi: ±2% Full Scale (Not Graded)
100 psi and above: ±1.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, psi	Numeric Increments, psi	Graduation Marks, psi
0 to 30	5	0.5
0 to 60	5	1
0 to 100	10	1
0 to 200	20	2
0 to 300	30	5
0 to 400	50	5
0 to 600	50	10

						Bottom Connection
Dial Diameter	For Tube OD	Environment Temp. Range, °F	Process Temp. Range, °F	Specifications Met	Mounting Orientation	Tube Connection Type	Connection Flange OD		Each
2 1/2"	1 1/2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	1.98"	0000000	0000000
2 1/2"	2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	2.49"	0000000	000000
3 1/2"	1 1/2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	1.98"	0000000	000000
3 1/2"	2"	0° to 150°	0° to 250°	3-A Certified 74-07	Any	Quick-Clamp	2.49"	0000000	000000

Hand-Held High-Vacuum Gauges

Front

Back

Check the vacuum levels in high-vacuum pumps, valves, and chambers with this compact gauge. Use a ring and clamp (both sold separately) to connect them to another quick-clamp high-vacuum fitting, also known as KF, QF, and NW fittings. The digital display shows measurements in torr, mbar (millibar) and hPa (hectopascal).

ABS Plastic Case with 304 Stainless Steel Connection—(Torr, mbar, hPa)

For Use With: Air
Accuracy: ±10% @ 7.5 to 7.5 × 10 ^-3 torr, ±30% @ 75 to 7.5 torr

Vacuum Range
Torr	mbar	hPa
750 to 7.5 × 10 ^-5	1000 to 5 × 10 ^-4	1000 to 5 × 10 ^-4

Gauges with Center Back Connection											Clamps		Rings
High-Vacuum Flange Size	Wd.	Ht.	Dp.	Environment Temp. Range, °F	Process Temp. Range, °F	For Tube OD	Flange OD	Number of Batteries Included		Each		Each		Each
Quick Clamp Tube Connection
16	2 3/8"	4 3/4"	1"	40° to 100°	0° to 140° F	3/4"	1.18"	1	000000	000000000	00000000	00000	00000000	00000

Flow Sights for Food and Beverage

Made of FDA-listed materials for use with food and beverage, these sights have sanitary quick-clamp connections and an electropolished 316 stainless steel body for easy disassembly and cleaning. They meet USP (United States Pharmacopeia) Class IV standard for food applications. Sights let you visually confirm flow and inspect liquid color and clarity. Backlight the back window to increase the visibility of dark liquids.

For technical drawings and 3-D models, click on a part number.

316 Stainless Steel Body
For Tube OD	Temp. Range, °F	Window Lg.	End-to-End Lg.	Ht.	Max. Pressure	Direction of Flow	Specifications Met		Each
1/2"	-20° to 300°	3/4"	3"	1/2"	150 psi @ 265° F	Any Direction	FDA Compliant 21 CFR 177.2600, USP Class IV	0000000	0000000
3/4"	-20° to 300°	1 1/8"	3 3/8"	3/4"	150 psi @ 265° F	Any Direction	FDA Compliant 21 CFR 177.2600, USP Class IV	0000000	000000
1"	-20° to 300°	1 1/8"	3 1/2"	1"	120 psi @ 265° F	Any Direction	FDA Compliant 21 CFR 177.2600, USP Class IV	0000000	000000
1 1/2"	-20° to 300°	1 1/2"	4 1/8"	1 1/2"	115 psi @ 265° F	Any Direction	FDA Compliant 21 CFR 177.2600, USP Class IV	0000000	000000
2"	-20° to 300°	1 7/8"	4 3/4"	2"	100 psi @ 265° F	Any Direction	FDA Compliant 21 CFR 177.2600, USP Class IV	0000000	000000

Flowmeter/Totalizers for Water and Chemicals

To withstand water and a variety of caustic chemicals, these flowmeter/totalizers have a corrosion-resistant 316 stainless steel body. They measure both flow rate and total flow volume. The batch total volume can be reset after each metering application. The total flow volume cannot be reset. They have an enclosure that meets NEMA 4 for protection from dirt and washdowns.

Flowmeter/totalizers with threaded connections have 316 stainless steel seals, which resist corrosion.

Connect flowmeter/totalizers with quick-clamp connections to other quick-clamp fittings (often called tri-clamp fittings) using a gasket and clamp. They’re easy to attach and remove for cleaning.

Certificate of calibration traceable to NIST states that the flowmeter/totalizer has passed a test for accuracy.

Optional output module transmits output signals to an external device such as a data recorder, logger, or remote display (not included). It includes 10 feet of cable with wire leads.

Optional remote panel-mounting kit lets you mount the meter’s display up to 100 feet away. It includes a sensor module and 10 feet of cable with wire leads.

Hazardous location environmental ratings indicate where manufacturers have included safety features in products to facilitate their safe use in hazardous environments. Before selecting a product for a hazardous location, ensure it is rated for your environment. See About Hazardous Location Environmental Ratings.

With Quick-Clamp Tube Connections

Flowmeter/Totalizers
Quick-Clamp Tube Connections											Replacement Displays
Type	Gender	For Tube OD	Flange OD	End-to-End Lg.	Flow Range, gpm	Accuracy	Max. Total Volume, units	Max. Pressure		Each		Each
Flowmeter/Totalizers
316 Stainless Steel Body and Seal—14° to 140° F
Gallons per Minute, Liters per Minute
Standard	Female	3/4"	0.984"	5"	1 to 10	±1.5%	999,999	1500 psi @ 70° F	0000000	000000000	00000000	0000000
Standard	Female	1"	1.984"	5"	2 to 20	±1%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	1 1/2"	1.984"	5 1/2"	5 to 50	±1%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	2"	2.515"	6 1/2"	10 to 100	±0.75%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	2 1/2"	3.047"	7"	20 to 200	±0.75%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Flowmeter/Totalizers with Certificate of Calibration Traceable to NIST
316 Stainless Steel Body and Seal—14° to 140° F
Gallons per Minute, Liters per Minute
Standard	Female	3/4"	0.984"	5"	1 to 10	±1.5%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	1"	1.984"	5"	2 to 20	±1%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	1 1/2"	1.984"	5 1/2"	5 to 50	±1%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	2"	2.515"	6 1/2"	10 to 100	±0.75%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000
Standard	Female	2 1/2"	3.047"	7"	20 to 200	±0.75%	999,999	1500 psi @ 70° F	0000000	00000000	00000000	000000

Accessories

Component	Pkg. Qty.		Pkg.
Disposable Batteries	4	00000000	00000

High-Vacuum Sights for Quick-Clamp Fittings

Sight Shown Assembled with Tube Fitting, Ring, and Clamp (All Sold Separately)

Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside. A sleeve seals the glass window to the body of the sight to prevent leaks. To connect to your chamber, you'll need a clamp and a ring (sold separately). Not for use in pressure applications.

For technical drawings and 3-D models, click on a part number.

Sights

Sight

				Window
High-Vacuum Flange Size	For Flange OD	High Vacuum Connection Type	Max. Vacuum	Dia.	Material	Max. Temp., °F		Each
304 Stainless Steel
16	1.18"	ISO-KF	1 × 10 ^-9 torr @ 72° F	5/8"	Glass	660°	0000000	0000000
25	1.57"	ISO-KF	1 × 10 ^-9 torr @ 72° F	5/8"	Glass	660°	0000000	000000
40	2.16"	ISO-KF	1 × 10 ^-9 torr @ 72° F	1 1/4"	Glass	660°	0000000	000000
50	2.95"	ISO-KF	1 × 10 ^-9 torr @ 72° F	1 1/4"	Glass	660°	0000000	000000

Clamps

For High-Vacuum Flange Size	For Flange OD	For Tube OD	Material	Max. Vacuum	High Vacuum Connection Type		Each
10, 16	1.18"	1/2", 3/4"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	00000000	00000
25	1.57"	1"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000
40	2.16"	1 1/2"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000
50	2.95"	2"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000

Rings

For High-Vacuum Flange Size	For Flange OD	For Tube OD	Inner Ring Material	Max. Vacuum	High Vacuum Connection Type		Each
16	1.18"	3/4"	304 Stainless Steel	1 × 10^-7 torr @ 72° F	ISO-KF	00000000	00000
25	1.57"	1"	304 Stainless Steel	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000
40	2.16"	1 1/2"	304 Stainless Steel	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000
50	2.95"	2"	304 Stainless Steel	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000

Email Us

About Pressure Gauges

About Pipe Size

About Flowmeters and Totalizers

How to Identify and Measure Fittings

Vibration-Resistant Food and Beverage Pressure Gauges

Food and Beverage Pressure Gauges

Hand-Held High-Vacuum Gauges

Flow Sights for Food and Beverage

Flowmeter/Totalizers for Water and Chemicals

High-Vacuum Sights for Quick-Clamp Fittings