Sight Flow Indicator
sight flow indicator(Impeller sight glass ) — robust impeller/rotor-based visual flow indicator for pipelines, tanks and process equipment. Available in stainless housings, borosilicate/quartz/sapphire windows. Download datasheet & request quote.
Description
TL;DR: Sight Flow Indicator robust impeller (rotor) visual flow indicator for inline observation. Ideal for pump lines, process piping and level/flow verification — available in standard ANSI/DIN connections, multiple window materials, and explosion-proof lighting options.
Key benefits
- Clear inline visual verification with rotating impeller — immediate flow/condition check.
- Available with borosilicate, fused quartz (UV), or sapphire windows for high-temp / high-pressure service.
- Stainless housings (304/316) and ANSI/DIN flange or threaded connections.
- Low-maintenance impeller mechanism — replaceable cartridge options for serviceability.
- Optional explosion-proof LED lighting and cleaning wipes / purge ports.
Technical specifications
| Model | Sight Flow Indicator(impeller sight glass) |
|---|---|
| Window material | Borosilicate glass (DIN7080) / Fused quartz / Sapphire glass (optional) |
| Housing | Stainless steel 304 / 316 (other alloys on request) |
| Connection | ANSI 150 / 300 / 600; DIN flanges; threaded BSP / NPT |
| Working pressure | up to 40 bar (dependent on model/window thickness) |
| Operating temp. | -40°C to +300°C (higher temperature customizable) |
| Visible bore | Ø 20–150 mm (custom sizes on request) |
| Standards & certs | EN / DIN flange compatibility; material certificates (EN10204-3.1) on request |
Note: allowable pressure & temperature depend on window material and thickness — supply operating pressure/temperature when requesting a quote.
Applications
- Pump discharge & suction lines (impeller action indicates flow direction & speed).
- Process piping in chemical, food & beverage, pharmaceutical industries.
- Boiler feed & condensate lines, filtration and slurry lines.
- OEM machines requiring inline visual verification.
Installation & maintenance
- Install using correct gasket type and torque bolts evenly to prevent point-loading of the window.
- Verify impeller rotation before pressurizing; replace impeller cartridge if worn.
- Clean window with non-abrasive cleaners; avoid strong HF acids with borosilicate.
FAQ
Q: What is the difference between an impeller sight glass and a plain sight glass?
A: Impeller (rotor) sight glasses include a rotating wheel that visibly indicates flow direction and approximate rate — plain sight glass only provides static viewing. Use impeller types for quick inline flow verification.
Q: Can I get a sanitary / CIP-compatible impeller sight glass?
A: Yes — we offer sanitary housings with FDA-compliant gaskets and smooth-bore impellers for CIP applications (specify material and surface finish).
