Armored Level Gauges | McMaster-Carr

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31 Products

Gauge Glass for Heavy Duty Level Indicators


Reflex Glass	Clear Glass

Use this gauge glass with heavy duty level indicators.

Reflex Glass—Reflex glass shows the level of liquid behind it, but you won’t see the liquid’s color or the particulates in it.

Clear Glass—Clear glass helps you monitor the color of liquid and any particulates in it, in addition to the liquid’s level. Use two pieces of this glass in your indicator; the liquid flows between them, so you see straight through.

Gaskets—Use gaskets to seal the glass.

	Glass													Gaskets
					Max. Pressure		Temp., ° F
	Gauge Glass Size	Ht.	Wd.	Thk.	Liquid	Steam	Min.	Max.	Specs. Met	JIS Specification	Mil. Spec.		Each		Each
Reflex Glass



		1	4 1/2"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K21	000000	36885K81	00000


		2	5 1/2"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K22	00000	36885K82	0000
		3	6 1/2"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K53	00000	36885K83	0000
		4	7 1/2"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K54	00000	36885K84	0000
		5	8 5/8"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K55	00000	36885K85	0000
		6	9 7/8"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K56	00000	36885K86	0000
		7	11"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K57	00000	36885K87	0000
		8	12 5/8"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K58	00000	36885K88	0000
		9	13 3/8"	1 5/16"	11/16"	4,000 psi @ 100° F	500 psi @ 425° F	-415	470	DIN 7080, DIN 7081	JIS B 8211	MIL-G-16356	36885K59	00000	36885K89	0000


		Clear Glass



				4	7 1/2"	1 5/16"	11/16"	1,940 psi @ 100° F	1,620 psi @ 425° F	-20	600	—	—	—	36885K614	000000	36885K84	0000


				5	8 5/8"	1 5/16"	11/16"	1,750 psi @ 100° F	1,460 psi @ 425° F	-20	600	—	—	—	36885K615	000000	36885K85	0000
				6	9 7/8"	1 5/16"	11/16"	1,565 psi @ 100° F	1,305 psi @ 425° F	-20	600	—	—	—	36885K616	000000	36885K86	0000
				7	11"	1 5/16"	11/16"	1,375 psi @ 100° F	1,145 psi @ 425° F	-20	600	—	—	—	36885K617	000000	36885K87	0000
				8	12 5/8"	1 5/16"	11/16"	1,190 psi @ 100° F	990 psi @ 425° F	-20	600	—	—	—	36885K618	000000	36885K88	0000
				9	13 3/8"	1 5/16"	11/16"	1,000 psi @ 100° F	835 psi @ 425° F	-20	600	—	—	—	36885K619	000000	36885K89	0000

Heavy Duty Gauge Glass Gaskets

Use these gaskets with heavy duty level indicators to seal the glass. They are not rated for steam.

			Max. Pressure		Temp. Range, ° F
	For Gauge Glass Size	Thk.	Liquid	Steam	Min.	Max.	Color		Each
Fiber/SBR



		1	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K81	00000


		2	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K82	0000
		3	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K83	0000
		4	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K84	0000
		5	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K85	0000
		6	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K86	0000
		7	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K87	0000
		8	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K88	0000
		9	1/16"	1,200 psi @ 600° F	Not Rated	-40	600	Gray	36885K89	0000

Heavy Duty Liquid-Level Indicators

Monitor liquid level in applications that have vibration, high pressures, and high temperatures. These indicators have steel chambers, glass windows, and seals made of fiber and SBR rubber to resist corrosion and withstand higher temperatures than other level indicators. Use them with a wide variety of liquids, such as petroleum, chemicals, and natural gas. All meet ASME BPVC.VIII.1 safety standards for pressure vessels, so they’re approved for use in low-pressure water and steam applications too. Their gauge is made of reflex glass, which shows the level of liquid behind the glass, but not the liquid’s color or any particulates in it. Also known as armored level gauges.

Screw Mount


Indicator with Reflex Glass	Shut-Off Valves	Replacement Glass	Replacement Gaskets

Shut-Off Valves—Add shut-off valves to stop flow with the turn of a wheel. They’re offset to help you access the inside of the gauge’s glass with minimal disassembly. This makes it easy to clean or replace the glass or entire indicator. These valves also stop flow automatically if the indicator glass breaks, preventing the loss of fluid. However, for permanent shut-off you must close them manually. Put one valve on top of your indicator and one on the bottom for a 90° connection between the indicator and your tank. To connect the female threads on your indicator to the female gauge threads on the shut-off valve, use a male pipe nipple (not included).

	Gauges													Shut-Off Valves		Replacement Glass		Replacement Gaskets
	Gauge Glass Size	Connection Ctr.-to-Ctr.	Overall Ht.	Window Ht.	Body Wd.	Max. Pressure @ Temp.	Temp. Range, ° F	Fitting Material	Seal Material	Window Material	For Use With		Each		Each		Each		Each
Steel Indicator with Reflex Glass







				1/2 NPT Female Thread

				4	8 1/4"	16 1/2"	6 3/4"	3 3/4"	2,725 psi @ 70° F	-20 to 600	Steel	Fiber/SBR	Glass	Alcohol-Based Solvents, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Ketone, Oil	3885N121	0000000	3885N175	0000000	36885K54	000000	36885K84	00000


				5	9 3/8"	18 3/4"	7 7/8"	3 3/4"	2,630 psi @ 70° F	-20 to 600	Steel	Fiber/SBR	Glass	Alcohol-Based Solvents, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Ketone, Oil	3885N122	00000000	3885N175	000000	36885K55	00000	36885K85	0000
				6	10 5/8"	10 5/8"	9 1/8"	3 3/4"	2,535 psi @ 70° F	-20 to 600	Steel	Fiber/SBR	Glass	Alcohol-Based Solvents, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Ketone, Oil	3885N116	000000	3885N175	000000	36885K56	00000	36885K86	0000
				7	11 3/4"	11 3/4"	10 1/4"	3 3/4"	2,440 psi @ 70° F	-20 to 600	Steel	Fiber/SBR	Glass	Alcohol-Based Solvents, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Ketone, Oil	3885N117	000000	3885N175	000000	36885K57	00000	36885K87	0000
				8	13 3/8"	13 3/8"	11 7/8"	3 3/4"	2,345 psi @ 70° F	-20 to 600	Steel	Fiber/SBR	Glass	Alcohol-Based Solvents, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Ketone, Oil	3885N118	000000	3885N175	000000	36885K58	00000	36885K88	0000
				9	14 1/8"	14 1/8"	12 5/8"	3 3/4"	2,250 psi @ 70° F	-20 to 600	Steel	Fiber/SBR	Glass	Alcohol-Based Solvents, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Ketone, Oil	3885N119	000000	3885N175	000000	36885K59	00000	36885K89	0000