
360° Full-View Flanged Connection
Sight Flow Indicators are devices used in piping systems to provide a visual indication of the flow of liquids, gases, or slurries within the system. They are crucial for monitoring and verifying the flow and condition of the media without disrupting the process.
OUR WARRANTY
100% Satisfaction Guarantee
Douglass warrants merchandise against defective workmanship and materials that become apparent within a period of 12 months from the date of receipt of invoice by the purchaser (hereinafter referred to as the warranty period). All liabilities under the warranty provisions shall expire when the warranty period has expired. Please feel free to contact us if you have any questions or comments.
SHIPPING AND PACKAGING
At Douglass, we use a unique and patented packaging method that minimizes the risk of glass damage during shipping. This system ensures your products arrive in perfect condition, just as we would like to receive them ourselves.
We understand that not all glass is the same, so we tailor our packaging techniques based on the type and quantity of products you order. This ensures maximum protection for every shipment.
Full View Sight Glass - Flow Indicator
Smooth bore, retention-free flow
These sight flow indicators, due to their smooth bore ID, prevent product retention regardless of sight flow orientation. Their connection can be adapted to any type or size of flange, and length customized to meet the required face-to-face dimension.
Flange flexibility
This model can be adjusted to any flange specification in any material, giving the user great flexibility by adapting to existing hardware.
Face-to-face flexibility
Can be made from 3" up to 48" with stainless steel rods up to 5/8" in diameter to protect extra-long glass cylinders.
Glass compression
The length of the protecting rods is calculated so it seals the sight glass without applying compression directly to it, so tempered glass can sustain impacts and pressure changes without cracking.
Visual Flow Indicators - Parts and Materials

| Item | Part name | Material options |
|---|---|---|
| 1 | Allen Bolts |
|
| 2 | Protection Rods |
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| 3 | Flanges |
|
| 4 | Sight Glass |
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| 5 | Gasket |
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Full View Sight Glass - Key Features
| Connection Type | Flanged |
|---|---|
| Flow indication type | Full View 360° Vision |
| Working pressure | From 0 to 300 PSI |
| Working temperature | From -45°C to 560°C |
| Minimum length | 75mm |
| Maximum length | 1500mm |
| Smallest flange | 1/2" |
| Largest flange | 10" |
