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  3. Test Instruments & Gauges
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  5. Flow Measuring Instruments
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  7. Sight Glass Flow Indicators

Sight Glass Flow Indicators (556 items) - Page 3

Dwyer Instruments Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg). SFI-350SS-3/8
Dwyer Instruments

Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).

Zoro # G210389411
Mfr # SFI-350SS-3/8
product price:  $500.99
/ea
Dixon 1 in FKM SIGHT GLASS SEAL KIT KIT CONTAINS: 2 HSG-RKV100
Dixon

1 in FKM SIGHT GLASS SEAL KIT KIT CONTAINS: 2

Zoro # G909195927
Mfr # HSG-RKV100
product price:  $22.99
/ea
Dwyer Instruments Polysulfone sight flow indicator only, range 3-35 GPM (11.4-132.5 LPM), 3/4" female NPT. SFI-800-3/4
Dwyer Instruments

Polysulfone sight flow indicator only, range 3-35 GPM (11.4-132.5 LPM), 3/4" female NPT.

Zoro # G610389417
Mfr # SFI-800-3/4
product price:  $126.99
/ea
Oil-Rite 303 Stainless Steel Wndw Flw Sights w/Ball Indicator - 1/2in. Female NPT, 1/2in. Female NPT, Buna-N B4767-4B
Oil-Rite

303 Stainless Steel Wndw Flw Sights w/Ball Indicator - 1/2in. Female NPT, 1/2in. Female NPT, Buna-N

Zoro # G316547289
Mfr # B4767-4B
product price:  $130.99
/ea
Dwyer Instruments Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg). SFI-350-3/4
Dwyer Instruments

Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).

Zoro # G710389430
Mfr # SFI-350-3/4
product price:  $312.99
/ea
J.W. Winco GN743-11-G3/8-A Oil Sight Glass 743-11-G3/8-A
J.W. Winco

GN743-11-G3/8-A Oil Sight Glass

Zoro # G4714939
Mfr # 743-11-G3/8-A
product price:  $13.19
/ea
J.W. Winco GN743.1-14-M20X1.5-A Oil Sight Glass Aluminum 743.1-14-M20X1.5-A
J.W. Winco

GN743.1-14-M20X1.5-A Oil Sight Glass Aluminum

Zoro # G4715727
Mfr # 743.1-14-M20X1.5-A
product price:  $16.65
/ea
J.W. Winco GN743-18-M26X1.5-A Oil Sight Glass 743-18-M26X1.5-A
J.W. Winco

GN743-18-M26X1.5-A Oil Sight Glass

Zoro # G4718247
Mfr # 743-18-M26X1.5-A
product price:  $14.75
/ea
J.W. Winco GN743.8-24-1-NPT-A Oil SIght Glass 1PSMD
J.W. Winco

GN743.8-24-1-NPT-A Oil SIght Glass

Zoro # G4722404
Mfr # 1PSMD
product price:  $38.35
/ea
Dwyer Instruments GL FLMTR 5-160 SCCM DR22432M
Dwyer Instruments

GL FLMTR 5-160 SCCM

Zoro # G510113921
Mfr # DR22432M
product price:  $1,139.99
/ea
Oil-Rite 303 Stainless Steel Gasketed Window Sights NPT Thread - 1 1/2in. NPT, 2in., Viton Liquid Contact B4763-17V
Oil-Rite

303 Stainless Steel Gasketed Window Sights NPT Thread - 1 1/2in. NPT, 2in., Viton Liquid Contact

Zoro # G116547502
Mfr # B4763-17V
product price:  $86.35
/ea
Oil-Rite Gasketed Wndw Sght Straight Thread - Straight w/Nut, 1in.-14, 1 1/4in., 125 PSI, Buna-N, 25/32in. B2394-4
Oil-Rite

Gasketed Wndw Sght Straight Thread - Straight w/Nut, 1in.-14, 1 1/4in., 125 PSI, Buna-N, 25/32in.

Zoro # G416547318
Mfr # B2394-4
product price:  $20.59
/ea
J.W. Winco GN743.1-24-G1-A Oil Sight Glass Aluminum 743.1-24-G1-A
J.W. Winco

GN743.1-24-G1-A Oil Sight Glass Aluminum

Zoro # G4722289
Mfr # 743.1-24-G1-A
product price:  $24.59
/ea
Oil-Rite 303 Stainless Steel Gasketed Window Sights Straight Thread - Straight w/Nut, 1in.-14, 1 1/4in. B4764-14B
Oil-Rite

303 Stainless Steel Gasketed Window Sights Straight Thread - Straight w/Nut, 1in.-14, 1 1/4in.

Zoro # G416547271
Mfr # B4764-14B
product price:  $81.29
/ea
J.W. Winco GN743-14-G1/2-A Oil Sight Glass 743-14-G1/2-A
J.W. Winco

GN743-14-G1/2-A Oil Sight Glass

Zoro # G4720478
Mfr # 743-14-G1/2-A
product price:  $14.15
/ea
Oil-Rite Fused Window Sights - 1in. NPT, 1 3/8in., None, Not Applicable, 1in. A2890-5
Oil-Rite

Fused Window Sights - 1in. NPT, 1 3/8in., None, Not Applicable, 1in.

Zoro # G816547390
Mfr # A2890-5
product price:  $8.85
/ea
Dwyer Instruments MOD 300MP SFI BRONZE 1-1/4 NPT SFI-300MP-1-1/4
Dwyer Instruments

MOD 300MP SFI BRONZE 1-1/4 NPT

Zoro # G910947782
Mfr # SFI-300MP-1-1/4
product price:  $389.99
/ea
Dwyer Instruments GL FLMTR .5-5 SLMP DR12470M
Dwyer Instruments

GL FLMTR .5-5 SLMP

Zoro # G310113930
Mfr # DR12470M
product price:  $915.99
/ea
J.W. Winco GN743.5-24-M33X1.5-B Oil Sight Glass 743.5-24-M33X1.5-B
J.W. Winco

GN743.5-24-M33X1.5-B Oil Sight Glass

Zoro # G4667856
Mfr # 743.5-24-M33X1.5-B
product price:  $41.69
/ea
Ranco Sight Glass, 2 1/2 in L, 1/4 in Sz, Female RSG-2FM
Ranco

Sight Glass, 2 1/2 in L, 1/4 in Sz, Female

Zoro # G422386048
Mfr # RSG-2FM
product price:  $20.59
/ea
Dixon In-Line Sight Glass, Clamp 1-1/2" B54BMP-R150
Dixon

In-Line Sight Glass, Clamp 1-1/2"

Zoro # G7152017
Mfr # B54BMP-R150
product price:  $326.99
/ea
J.W. Winco GN743-32-M40X1.5-B Oil Sight Glass 743-32-M40X1.5-B
J.W. Winco

GN743-32-M40X1.5-B Oil Sight Glass

Zoro # G4722130
Mfr # 743-32-M40X1.5-B
product price:  $25.25
/ea
Oil-Rite Fused Window Sights - 2in. NPT, 2 1/2in., Stainless Steel, Not Applicable, 1 31/32in. A2890-18
Oil-Rite

Fused Window Sights - 2in. NPT, 2 1/2in., Stainless Steel, Not Applicable, 1 31/32in.

Zoro # G716547452
Mfr # A2890-18
product price:  $35.39
/ea
Oil-Rite Gasketed Wndw Sight Straight Thread - Straight, 3/4in.-16, 15/16in., SS, 125 PSI, Buna-N, 9/16in. B2396-12
Oil-Rite

Gasketed Wndw Sight Straight Thread - Straight, 3/4in.-16, 15/16in., SS, 125 PSI, Buna-N, 9/16in.

Zoro # G916547290
Mfr # B2396-12
product price:  $19.65
/ea
J.W. Winco GN743-32-M42X1.5-B Oil Sight Glass 743-32-M42X1.5-B
J.W. Winco

GN743-32-M42X1.5-B Oil Sight Glass

Zoro # G4721336
Mfr # 743-32-M42X1.5-B
product price:  $22.95
/ea
Dwyer Instruments Sight window, 3/8" male NPT. SFI-550-3/8
Dwyer Instruments

Sight window, 3/8" male NPT.

Zoro # G807149121
Mfr # SFI-550-3/8
product price:  $25.65
/ea
J.W. Winco GN743-11-M16X1.5-A Oil Sight Glass 743-11-M16X1.5-A
J.W. Winco

GN743-11-M16X1.5-A Oil Sight Glass

Zoro # G4715648
Mfr # 743-11-M16X1.5-A
product price:  $12.75
/ea
J.W. Winco GN743-18-M27X1.5-B Oil Sight Glass 743-18-M27X1.5-B
J.W. Winco

GN743-18-M27X1.5-B Oil Sight Glass

Zoro # G4721677
Mfr # 743-18-M27X1.5-B
product price:  $17.15
/ea
J.W. Winco GN743.2-18-G3/4-B Oil Sight Glass Brass 743.2-18-G3/4-B
J.W. Winco

GN743.2-18-G3/4-B Oil Sight Glass Brass

Zoro # G4704168
Mfr # 743.2-18-G3/4-B
product price:  $17.45
/ea
Oil-Rite Gsketed Wndw Sght Straight Thread - Stght w/Nut, 1in.-14, 1 1/4in., SS, 125 PSI, Buna-N, 25/32in. B2396-3
Oil-Rite

Gsketed Wndw Sght Straight Thread - Stght w/Nut, 1in.-14, 1 1/4in., SS, 125 PSI, Buna-N, 25/32in.

Zoro # G216547143
Mfr # B2396-3
product price:  $19.69
/ea
J.W. Winco GN743.7-11-3/8-NPT-B Oil Sight Glass 6PTK5
J.W. Winco

GN743.7-11-3/8-NPT-B Oil Sight Glass

Zoro # G4710784
Mfr # 6PTK5
product price:  $19.15
/ea
J.W. Winco GN743.2-11-G3/8-A Oil Sight Glass Brass 743.2-11-G3/8-A
J.W. Winco

GN743.2-11-G3/8-A Oil Sight Glass Brass

Zoro # G4707799
Mfr # 743.2-11-G3/8-A
product price:  $13.29
/ea
J.W. Winco GN743.1-11-M16X1.5-B Oil Sight Glass Aluminum 743.1-11-M16X1.5-B
J.W. Winco

GN743.1-11-M16X1.5-B Oil Sight Glass Aluminum

Zoro # G4715824
Mfr # 743.1-11-M16X1.5-B
product price:  $17.19
/ea
J.W. Winco GN537-32-38-B Oil Sight Glass Aluminum RD3/B
J.W. Winco

GN537-32-38-B Oil Sight Glass Aluminum

Zoro # G4704484
Mfr # RD3/B
product price:  $27.95
/ea
Oil-Rite Gasketed Window Sght Straight Thread - Straight, 1in.-14, 1 1/4in., SS, 125 PSI, Buna-N, 25/32in. B2396-13
Oil-Rite

Gasketed Window Sght Straight Thread - Straight, 1in.-14, 1 1/4in., SS, 125 PSI, Buna-N, 25/32in.

Zoro # G816547185
Mfr # B2396-13
product price:  $17.59
/ea
Dixon Replacement Glass, 3 in, For Use with B54BMP In-Line Sight Glass, Borosilicate Glass B54G-P300
Dixon

Replacement Glass, 3 in, For Use with B54BMP In-Line Sight Glass, Borosilicate Glass

Zoro # G909195934
Mfr # B54G-P300
product price:  $378.99
/ea
Sight Glass Flow Indicators (556 items) - Page 3
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About Sight Glass Flow Indicators

Sight Glass Flow Indicators are a type of visual flow indicator used to measure the rate and direction of liquids, gases, and steam in pipes. They are a critical tool for many industries that rely on accurate measurements of flow in order to maintain safety and efficiency.

Types of Sight Glass Flow Indicators

There are several types of Sight Glass Flow Indicators commonly used today. Flanged sight glass flow indicators are often used when more accuracy is needed, while inline sight flow indicators are typically better suited for heavier duty applications. Oil flow sight glasses may be preferred for certain applications where viscosity is an issue. Water flow indicator sight glasses may also be necessary depending on the particular application.

How Sight Glass Flow Indicators are Made

Sight Glass Flow Indicators are typically made with high-quality glass and metal components. The glass allows professionals to visually inspect the contents inside the pipe while also allowing light to pass through so they can see what is happening inside the pipe. The metal components provide support and protection to ensure proper function over time.

Industries that use Sight Glass Flow Indicators

Sight Glass Flow Indicators can be found in a variety of industries, from plumbing and engineering to oil refining and chemical production. Professionals across these fields rely on these tools for their ability to accurately measure the rate, direction, temperature, pressure, and other characteristics related to liquid or gas flows.

Find the Sight Glass Flow Indicators You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of sight glass flow indicators, along with other tools or equipment to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.

Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

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dwyer flow indicator1" npt sight glass3/4 in all thread3/4" velcronpt sight glass
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