Sight Flow Indicators (SFI)
Reliable visual monitoring solutions for accurate flow and level indication in critical industrial processes.
About Sight Flow Indicators (SFI)
Sight Flow Indicators, also known as Sight Glasses or Level Gauges, are essential monitoring devices that provide real-time visual observation of liquid flow and level conditions within pipelines, tanks, boilers, pressure vessels, and process equipment. They play a critical role in ensuring safe, efficient, and reliable operation across industrial processes.
At Avant Tech, we partner with Flometriq, a globally recognized manufacturer of high-performance Sight Flow Indicators, to deliver dependable flow and level monitoring solutions for demanding industrial applications. Manufactured in India to international engineering standards, these indicators are supplied to projects across the GCC, USA, Europe, and Southeast Asia.
Flometriq offers a comprehensive range of Sight Flow Indicators, including Reflex Gauges, Bi-Colour Gauges, Magnetic Level Indicators, and Tubular Gauges, designed to suit diverse process requirements. Available in Stainless Steel, Carbon Steel, Duplex, and specialty alloys, they provide excellent durability, corrosion resistance, and long-term reliability in high-pressure and high-temperature environments.
Through our partnership with Flometriq, Avant Tech delivers proven process monitoring solutions backed by decades of engineering expertise, helping customers enhance operational safety, improve process visibility, and maintain efficient plant performance.
Available Models
Choose from our comprehensive range of sight flow indicator gauge types and configurations
Specifications & Details
Comprehensive information about our sight flow indicator systems
1Gauge Types Available
- ▪Reflex Gauges - Clear liquid/gas distinction with silvery white appearance for liquid
- ▪Bi-Colour Gauges - Red for gas, green for liquid for enhanced visibility
- ▪Magnetic Indicators - No glass contact, safe for high pressure/temperature
- ▪Tubular Gauges - Simple transparent tube design for basic applications
2Technical Specifications
- ▪Pressure Rating: Up to 400 Bar (depending on gauge type)
- ▪Temperature Range: -20°C to +300°C for standard designs
- ▪Glass Material: Soda-lime or Borosilicate for superior corrosion resistance
- ▪Connection Standards: ANSI, DIN, ISO, and BS 10 flanged connections
3Construction Features
- ▪Metal shroud protection against impact and scratching
- ▪Patterned backplate for improved readability
- ▪Safety ball valves to limit media release in case of glass failure
- ▪Mechanically prestressed glass for enhanced durability
- ▪Bolted or fused metal-to-glass assembly
4Applications
- ▪Steam Boilers & Pressure Vessels
- ▪Chemical Plants & Reactors
- ▪Oil & Gas Processing
- ▪Food & Beverage Production
- ▪Pharmaceutical Manufacturing
- ▪Bio-Gas Plants & Digesters
5Body Materials
- ▪Stainless Steel (304/316) - Standard choice
- ▪Carbon Steel with protective coating
- ▪Duplex/Super Duplex for highly corrosive environments
- ▪Aluminum alloy options for lightweight applications
6Safety & Compliance
- ▪ASME Boiler & Pressure Vessel Code compliant
- ▪National Board of Boiler & Pressure Vessel Inspectors approved
- ▪ISO 1803 & DIN 3353 standards
- ▪Regular inspection and testing procedures per ANSI standards
- ▪Emergency shut-off valves for operator safety
7Maintenance & Service
- ▪Easy glass tube replacement in the field
- ▪Regular flushing recommended to prevent scale buildup
- ▪Daily testing procedures per ANSI/National Board recommendations
- ▪Pre-cut spare tubes and seals kits available
- ▪Professional installation and calibration services
Why Choose Avant Tech Sight Flow Indicators?
Industry-leading expertise and exceptional service quality
State-of-the-Art Facility with In-House Pressure Drop Testing
At Avant Tech we partner with Flometriq Filtration, which operates from a 45,000 sq.ft. world-class combined manufacturing and testing facility equipped with advanced machinery and instrumentation. Our in-house Pressure Drop Testing Lab ensures every strainer is validated for maximum efficiency and reliability under real-world conditions.
Expert Design Team with 30+ Years of Experience
At Avant Tech we partner with Flometriq Filtration, a trusted Sight Flow Indicators manufacturer, our design team brings over four decades of expertise in creating innovative and reliable filtration solutions. Whether it's a standard model or a customized design, our team ensures every solution meets the highest industry standards for quality and efficiency.
Exceptional After-Sales Support
Our commitment to customer satisfaction goes beyond delivery. With a dedicated support team, we provide guidance on installation, maintenance, and troubleshooting to ensure the long-term performance of your equipment.
Prompt Delivery
As a leading supplier, we understand the importance of timely delivery for industrial operations. With standard models in stock and an efficient supply chain, we ensure your orders are delivered on time, every time.
Manufacturing Facility Gallery
Explore our state-of-the-art manufacturing facility
See the process behavior before the instruments tell the story.
Sight flow indicators provide direct visual confirmation of flow, color, clarity, phase change, and line condition.
Process View
Share media, flow direction, visibility goal, pressure, temperature, and line size.
Connection Details
Send end connection, pressure class, mounting orientation, and installation access.
Indicator Style
Choose flapper, rotor, drip tube, plain window, or large-view configuration.
Quote & Supply
Receive model, glass/body specification, pricing, test needs, and delivery plan.
Visual confirmation matched to pressure, media, and viewing angle.
We align glass type, body material, indicator style, connection, and rating to your service conditions.
Request a Quote
Send line size, media, pressure, temperature, connection, visibility goal, and quantity.
Your process conditions and project details remain confidential.
Direct Flow View
Observe flow, color, clarity, bubbles, and phase changes in real time.
Glass & Body Options
Body material, glass, seals, and indicator internals selected for media compatibility.
Indicator Styles
Flapper, rotor, full-view, and drip-tube styles for different viewing needs.