Double Window Sight Flow Indicators

Double Window Sight Flow Indicators Double Window Sight Flow Indicators

Double Window Sight Flow indicators are commonly used in pipelines across industries to observe flow. Double Window Type Sight Flow Indicators provide durable, quick and an economical way to verify the flow of liquids through industrial process lines. They are used in process lines having high pressure and temperature conditions and so are made from cast construction and fabricated design, to meet an industrial requirement of various applications and contain two toughened glasses mounted opposite to each other, for better visibility. Double window type sight flow Indicators are available with various thickness and diameter of glass to suit various applications and industries like pharmaceutical, chemical, petroleum etc. Double window type sight flow indicator is very easy to maintain, since it requires only replacement of glass without dismantling the whole sight glass assembly from the process line.

Let’s Connect

Product Video

Double Window Sight Glasses are designed to provide safe and clear visual inspection of fluid flow, level, or process conditions inside pipelines, tanks, or vessels. These sight glasses are manufactured with two transparent windows installed opposite each other, allowing operators to easily monitor the process from both sides without interrupting the system.

Double window sight glasses are widely used in chemical, pharmaceutical, food processing, oil & gas, and water treatment industries where continuous monitoring of liquid clarity, color, flow, or contamination is required.

These units are manufactured using robust metallic bodies and high-quality transparent glass such as toughened borosilicate glass to withstand high pressure, temperature, and corrosive environments.

Dual Window Design – Provides clear visibility from both sides for effective inspection.
High Strength Glass – Toughened borosilicate glass ensures durability and thermal resistance.
Leak Proof Construction – Precision machining with high-quality sealing gaskets.
High Pressure & Temperature Resistance – Suitable for demanding industrial applications.
Corrosion Resistant Materials – Available in SS304, SS316, SS316L, and other alloys.
Easy Installation & Maintenance – Simple design allows quick installation and glass replacement.
Excellent Process Monitoring – Allows continuous observation without stopping the process.
Long Service Life – Rugged construction ensures reliable performance.

Glass Type

Toughened Borosilicate Glass
Tempered Soda Lime Glass
Quartz Glass (for high temperature applications)

Gasket / Sealing Material

PTFE
EPDM
Viton
Neoprene
Silicone

Optional Accessories

Wiper Assembly
LED / Halogen Illuminator
Spray Nozzle for Cleaning
Protective Glass Shield
Anti-Frost / Heated Jacket

Parameter	Specification
Size Range	DN15 to DN300 (½” to 12”)
Temperature Range	Up to 250°C (depending on glass type)
Glass Thickness	10 mm – 25 mm
Window Type	Double Window (Opposite Viewing)
Body Material	SS304 / SS316 / SS316L / CS
Sealing	PTFE / Viton / EPDM

Major Applications

Chemical Processing Plants
Pharmaceutical & Biotech Industries
Oil & Gas Refineries
Petrochemical Plants
Food & Beverage Processing
Water & Wastewater Treatment Plants
Power Plants
Fertilizer & Pulp Industries

Typical Uses

Flow monitoring in pipelines
Visual inspection of liquid clarity or contamination
Process observation in tanks and vessels
Monitoring mixing or chemical reactions
Checking product color or turbidity

Sight Glass