Barrel Gauges | McMaster-Carr

	For Drum Capacity For Drum Capacity

30 gal.

55 gal.

	For Use With For Use With

	Pipe Size Pipe Size

3/4

1 1/4

1 1/2

	Mounting Orientation Mounting Orientation

Vertical

Horizontal

	Float Rod Material Float Rod Material

Steel

Stainless Steel

Aluminum

	Float Material Float Material

Rubber

Plastic

	For Container Type For Container Type

Drum

Open Tank

	Graduation Marks Graduation Marks

	Maximum Pressure Maximum Pressure

	Window Material Window Material

Plastic

Glass

	Overall Height Overall Height

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	For Tank Depth For Tank Depth

	Housing Material Housing Material

Plastic

Aluminum

	Seal Material Seal Material

Rubber

Plastic

	For Drum Depth For Drum Depth

27 1/2"

33 1/2"

	Window Height Window Height

19 5/8"

	Overall Depth Overall Depth

2 1/2"

4 1/2"

	Fitting Material Fitting Material

Plastic

Stainless Steel

Steel

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28 Products

Liquid-Level Gauges for Drums

Vertical Mount

Horizontal Mount

Measure water, hydraulic fluid, or diesel fuel level in your drum.

Gauges with 316 stainless steel float rods are more corrosion resistant than gauges with zinc-plated steel float rods.

Vertical-mount gauges install through the top opening of your drum. They measure your liquid in gallons, liters, and volume fractions.

Horizontal-mount gauges install by attaching one pipe connection to the opening of a horizontal drum. Attach a drain or valve to the pipe connection on the other end. They have sliding markers for calibration and measure your liquid in gallons and liters.

					Overall				Temp. Range, °F
For Drum Capacity, gal.	For Drum Dp.	Pipe Size	Thread Type	Gender	Dp.	Ht.	Window Ht.	Max. Pressure, psi	Min.	Max.	Float Material	Housing Material	Window Material	Graduation Marks		Each
Vertical Mount
Zinc-Plated Steel Float Rod
30	27 1/2"	3/4	NPT	Male	2 1/2"	18 1/2"	3"	70	-20°	110°	Buna-N Rubber	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	000000
30	27 1/2"	2	NPT	Male	2 1/2"	18 1/2"	3"	70	-20°	110°	Polyethylene Plastic	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	00000
55	33 1/2"	3/4	NPT	Male	2 1/2"	21 1/2"	3"	70	-20°	110°	Buna-N Rubber	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	00000
55	33 1/2"	2	NPT	Male	2 1/2"	21 1/2"	3"	70	-20°	110°	Polyethylene Plastic	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	00000
316 Stainless Steel Float Rod
30	27 1/2"	3/4	NPT	Male	2 1/2"	18 1/2"	3"	70	-20°	110°	Buna-N Rubber	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	000000
30	27 1/2"	2	NPT	Male	2 1/2"	18 1/2"	3"	70	-20°	110°	Polyethylene Plastic	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	000000
55	33 1/2"	3/4	NPT	Male	2 1/2"	21 1/2"	3"	70	-20°	110°	Buna-N Rubber	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	000000
55	33 1/2"	2	NPT	Male	2 1/2"	21 1/2"	3"	70	-20°	110°	Polyethylene Plastic	Cellulose Acetate Plastic	Plastic	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	0000000	000000
Horizontal Mount
Steel Fitting
55	__	3/4	NPT	Male	4 1/2"	22 1/8"	19 5/8"	Not Rated	35°	150°	__	Aluminum	Glass	5, 1	0000000	00000
PVC Plastic Fitting
55	__	3/4	NPT	Male	4"	22 1/8"	19 5/8"	Not Rated	40°	140°	__	Aluminum	Glass	5, 1	0000000	00000
304 Stainless Steel Fitting
55	__	3/4	NPT	Male	4 1/2"	22 1/8"	19 5/8"	Not Rated	35°	150°	__	Aluminum	Glass	5, 1	0000000	00000

Vertical-Mount Fuel-Level Gauges for Tanks

Install these gauges through the top of your tank to monitor diesel fuel, fuel oil, or gasoline level.

Gauges with float rods are UL Listed for flammable liquids. For shallower tanks, cut the float rod ½” to 1” shorter than your tank depth to prevent it from touching the bottom.

Optional remote-reading dials use two wires to send a signal to a receiver or dashboard for monitoring fuel levels remotely.

Brass Center Shaft

Aluminum Float Rod

Replacement Dial

Gauges
						Temp. Range, °F										Replacement Dials
For Tank Dp.	Pipe Size	Thread Type	Gender	Dial Dia.	Max. Pressure, psi	Min.	Max.	For Container Type	Float Material	Guide Rod Material	Dial Material	Graduation Marks	Features		Each		Each
Brass Center Shaft
8"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	000000	0000000	000000
12"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	00000	0000000	00000
18"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	00000	0000000	00000
19 1/2"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	00000	0000000	00000
24"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	00000	0000000	00000
27"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	000000	0000000	00000
30"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	000000	0000000	00000
36"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	Zinc-Plated Steel	Zinc	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic Lens	0000000	000000	0000000	00000
Aluminum Float Rod
36"	1 1/2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	__	Zinc	Full, 3/4, 1/2, 1/4, Empty	Plastic Lens	0000000	000000	0000000	00000
36"	2	NPT	Male	2 5/16"	25	-40°	155°	Open Tank	Buna-N Rubber	__	Zinc	Full, 3/4, 1/2, 1/4, Empty	Plastic Lens	0000000	000000	0000000	00000

Optional Dials for Gauges with Brass Center Shafts

Optional Remote-Reading Dial

Component		Each
Remote-Reading Dial	0000000	0000000

Horizontal-Mount Fuel-Level Gauges for Tanks

Mount these gauges on the flat end of a horizontal, cylindrical tank to monitor diesel fuel, fuel oil, or gasoline level. They are UL listed for flammable liquids. For shallower tanks, cut the rod ½” to 1” shorter than your tank depth to prevent it from touching the bottom.

						Temp. Range, °F
For Tank Dp.	Pipe Size	Thread Type	Gender	Dial Dia.	Max. Pressure, psi	Min.	Max.	For Container Type	Float Material	Dial Material	Graduation Marks	Features		Each
Aluminum Float Rod
21 1/2"	1 1/2	NPT	Male	2 5/16"	10	-40°	155°	Open Tank	Buna-N Rubber	Zinc	Full, 3/4, 1/2, 1/4, Empty	Plastic Lens	0000000	000000
25"	1 1/4	NPT	Male	2 5/16"	10	-40°	155°	Open Tank	Buna-N Rubber	Zinc	Full, 3/4, 1/2, 1/4, Empty	Plastic Lens	0000000	00000

Pop-Up Full-Tank Indicators

Avoid overfilling—these indicators pop up when your tank is almost full.

			Temp. Range, °F
Pipe Size	Overall Ht.	Max. Pressure	Min.	Max.	For Use With		Each
Polyethylene Plastic
3/4	5"	Not Rated	20°	120°	Water, Hydraulic Fluid, Diesel Fuel	0000000	000000
3/4	11"	Not Rated	20°	120°	Water, Hydraulic Fluid, Diesel Fuel	0000000	00000