Tempered Borosilicate Level Sight Glasses DIN7081 - Transparent
Made of borosilicate glass, Transparent Gauge Glass is used in numerous applications where both chemical resistance and low thermal expansion coefficient are required. For FLAT level indicators, a two-sided observation system is used, as direct observation through the glasses is allowed as the fluid rises or falls. These are mainly used in processes where the color of the liquid is of high importance for the process or applications that require a protective mica.
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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.
High-pressure transparent level gauge glasses serve as an indispensable tool in environments where monitoring the exact level of fluids under high pressure is critical.
Unlike their reflex counterparts, these gauges employ two pieces of flat, transparent glass mounted on opposite sides of a tank or vessel, allowing operators to observe the fluid level directly. This design is particularly advantageous in applications where it is essential to view the characteristics of the fluid itself, such as color, clarity, and the presence of any sediments or separations.
The straightforward, yet effective, visibility provided by these gauges makes them a key component in maintaining operational safety and efficiency, ensuring precise fluid management in even the most demanding industrial settings.
Level Gauge Glass — Technical Information
Crystal length l by size (DIN 7081 reference)
| THK b | RD r | 2 | 3 | 4 | 5 | 6 | 7 | 8m | 9 | 10 | 11 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.18" | 0.59" | 140 mm | 165 mm | 190 mm | 220 mm | 250 mm | 280 mm | 320 mm | 340 mm | 370 mm | 400 mm |
| 1.34" | 0.67" | 5-1/2" | 6-1/2" | 7-1/2" | 8-5/8" | 9-7/8" | 11" | 12-5/8" | 13-3/8" | — | — |
Chemical properties
| Property | Specification |
|---|---|
| Hydrolytic Resistance | HGB 1 (ISO 719) |
| Acid Resistance | CLASS S1 (ISO 1776) |
| Alkaline Resistance | CLASS A2 (ISO 695) |
| SiO₂ | Minimum content 80% |
| B₂O₃ | Minimum content 13% |
| Na₂O + K₂O | Minimum content 4.5% |
See through — Transparent gauge glass
For transparent level indicators, a two-sided observation system is used; direct observation through the crystals is allowed as the fluid rises or falls. These are mainly used in processes where the color of the liquid is of high importance for the process, or applications which require a protective mica.
Manufactured in accordance with DIN 7081
In order to achieve the standardization of this type of sight glass across industries, the German regulatory institute DIN established standard parameters for manufacture. Among the main characteristics of this regulation are the dimensional parameters, pressure resistance, chemical composition, characteristics of the glass and viewing surfaces, tolerance parameters regarding parallelism, and the necessary acceptance tests.
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