Optical Glass can be supplied and processed as Level Gauge Glass when the exact grade or functional material duty, stock form, dimensions, thickness, edge and surface requirements are defined by the drawing. The assigned material or application record notes: Material- and grade-dependent; qualify cutting, grinding, drilling, lapping and polishing against fracture and surface requirements. The assigned product record adds: Tubular gauge, transparent plate, reflex prismatic plate, red-line tube or heavy-wall tube.
Can Optical Glass Be Used for Level Gauge Glass?
Optical Glass can be supplied and processed as Level Gauge Glass when the exact grade or functional material duty, stock form, dimensions, thickness, edge and surface requirements are defined by the drawing. The assigned material or application record notes: Material- and grade-dependent; qualify cutting, grinding, drilling, lapping and polishing against fracture and surface requirements. The assigned product record adds: Tubular gauge, transparent plate, reflex prismatic plate, red-line tube or heavy-wall tube.
Optical Glass
Material- and grade-dependent; qualify cutting, grinding, drilling, lapping and polishing against fracture and surface requirements
Level Gauge Glass
Tubular gauge, transparent plate, reflex prismatic plate, red-line tube or heavy-wall tube
Drawing-defined feasibility
Final feasibility is reviewed against grade, supplied stock, dimensions, thickness, holes, cutouts, edges, surfaces, quantity and inspection criteria.
How the Glass Type and Product Form Fit Together
The assigned technical records separate published material or application guidance from the dimensions and acceptance criteria that remain drawing-specific.
| Review area | Assigned technical basis |
|---|---|
| Material definition | Material- and grade-dependent; qualify cutting, grinding, drilling, lapping and polishing against fracture and surface requirements |
| Product-form definition | Tubular gauge, transparent plate, reflex prismatic plate, red-line tube or heavy-wall tube |
| Typical materials | DURAN tubular gauge glass or tempered borosilicate reflex/transparent level-gauge glass |
| Application duty | Show liquid level reliably in a tubular, transparent-plate or reflex-prism gauge while retaining the process fluid. |
| Inspection basis | Dimension/profile inspection, edge and prism visual check, material marking, assembly leakage and pressure validation |
Gauge Glass Properties Relevant to This Product Form
Published values retain their grade and source conditions. Finished-part behavior also depends on geometry, machining, edge condition and assembly.
| Material property | Published reference |
|---|---|
| Material category | Gauge/sight glass |
| Chemical resistance | Acid class 1 reported by the reviewed DIN 7081 manufacturer datasheet |
| Available forms | Oblong transparent or reflex gauge-glass plates |
Geometry, Surface and Inspection Requirements
Product-family data is a planning reference. The drawing must identify the exact shape, critical zones and measurable acceptance limits.
| Product requirement | What to define |
|---|---|
| Geometry and available forms | Tubular gauge, transparent plate, reflex prismatic plate, red-line tube or heavy-wall tube |
| Dimensions and thickness | DIN 7081 plates: 95–500 mm length, 30 or 34 mm width; tubular products publish 90–600 psi variants by size/end finish |
| Holes, cutouts and features | Dimension holes, slots, cutouts, steps, grooves, radii and their edge distances. |
| Edge and surface zones | Ground seating edges; tubular ends fire-polished or saw-cut/ground according to variant |
| Inspection | Dimension/profile inspection, edge and prism visual check, material marking, assembly leakage and pressure validation |
| Packaging and handling | State cleanliness, protective film, separators, individual packing and shipping requirements. |
| Manufacturing route item | Review requirement |
|---|---|
| Supplied stock | Oblong transparent or reflex gauge-glass plates |
| Compatible route | Precision cutting; CNC/ultrasonic machining where qualified; grinding; lapping; polishing; cleaning; inspection |
| High-risk geometry | Grade, thickness, surface state, wavelength and temperature conditions must not be generalized |
| Drawing release | For Optical Glass Level Gauge Glass, define datums, critical features, edge and surface zones, quantity, inspection and packaging before releasing the route. |
Inspection Focus for Custom Optical Glass Level Gauge Glass Processing
Acceptance should connect every critical drawing characteristic to an instrument, fixture condition and stated limit.
| Review item | Project-specific focus |
|---|---|
| Product design risk | Wrong reflex/transparent type, steam/alkali attack, gasket overload, end damage and pressure misapplication |
| Product inspection | Dimension/profile inspection, edge and prism visual check, material marking, assembly leakage and pressure validation |
| Application failure modes | Incorrect gauge type, caustic attack, end damage, uneven gasket compression and misuse of a pressure table. |
| Application inspection | Dimensional/profile inspection, edge and prism visual examination, marking check and assembly leak/pressure test. |
| Acceptance method | Microscopic Edge Inspection: Compare calibrated result with the drawing, purchase order or approved test specification |
| Feature-to-edge damage | For Custom Optical Glass Level Gauge Glass Processing, inspect chips, microcracks, breakouts and edge damage around processed features and adjacent walls. |
Information Needed Before Quotation
State the exact material grade or selection duty, stock form, dimensions, tolerance, edge and surface zones, quantity and inspection documentation.
RFQ inputs
- Gauge type, standard/size code, length, width/OD, thickness/wall, pressure, temperature, medium, end finish, gasket and mica protection
- Gauge type, standard/size code, dimensions, pressure, temperature, medium, end finish, gasket and mica protection.
- Provide a drawing revision, material or grade, quantity, dimensions, tolerances, critical surfaces and the required inspection record.
Selected Material, Product and Application References
References support the assigned records but do not replace an approved drawing, first-article result or application qualification.
- DIN 7081:1999-05 Pressure resistant sight glasses made of borosilicate glass for use in oblong armaturesDIN Media
- SCHOTT Tubular Gauge Glassschott.com
- KLINGER Instrumentation and Level Gaugesklinger-international.com
- Reflex and Transparent Level Gauge Glass DIN 7081Dumico
- Optical Manufacturing CapabilitiesBond Optics
Request a Project-Specific Glass Review
Send the drawing, material, dimensions, quantity, tolerances, surfaces and inspection requirements for feasibility review.
- Material: Optical Glass
- Drawing or part sketch
- glass type/grade
- Thickness / part size
- Quantity
STEP/STP, DXF, DWG, PDF, IGS/IGES or ZIP.
Confidential drawing review. NDA support available on request.
Frequently Asked Questions
These answers use the material, process, product and application data assigned to this page.
Can Optical Glass be made as Level Gauge Glass for Custom Optical Glass Level Gauge Glass Processing?
Optical Glass can be supplied and processed as Level Gauge Glass when the exact grade or functional material duty, stock form, dimensions, thickness, edge and surface requirements are defined by the drawing. The assigned material or application record notes: Material- and grade-dependent; qualify cutting, grinding, drilling, lapping and polishing against fracture and surface requirements. The assigned product record adds: Tubular gauge, transparent plate, reflex prismatic plate, red-line tube or heavy-wall tube.
Which material-grade details are needed for Custom Optical Glass Level Gauge Glass Processing?
For Custom Optical Glass Level Gauge Glass Processing, name the exact grade or provide the temperature, pressure, chemical, optical, sealing, cleaning and wear conditions needed to select it.
Which dimensions and features control Custom Optical Glass Level Gauge Glass Processing?
For Custom Optical Glass Level Gauge Glass Processing, define outer dimensions, thickness, OD and ID where relevant, holes, slots, cutouts, steps, radii, edge distances, datums and critical surfaces.
How is the manufacturing route selected for Custom Optical Glass Level Gauge Glass Processing?
For Custom Optical Glass Level Gauge Glass Processing, the route is selected from the glass grade, supplied stock, geometry, edge and surface requirements, quantity and inspection method rather than from the product name alone.
Which quality checks matter for Custom Optical Glass Level Gauge Glass Processing?
For Custom Optical Glass Level Gauge Glass Processing, inspect dimensions, chips, cracks, edge condition, scratches, contamination and any optical, sealing or application-specific characteristic stated on the drawing.
What should an RFQ include for Custom Optical Glass Level Gauge Glass Processing?
For Custom Optical Glass Level Gauge Glass Processing, gauge type, standard/size code, length, width/OD, thickness/wall, pressure, temperature, medium, end finish, gasket and mica protection Gauge type, standard/size code, dimensions, pressure, temperature, medium, end finish, gasket and mica protection.