DIN7081 Reflex Level Gauge Glass
DIN7081 reflex level gauge glass for clear, reliable level indication. Reflex sight glass discs and tubes for level gauge glass housings. Datasheet, COA and custom sizes available.
Description
DIN7081 reflex level gauge glass provides clear, high-contrast visual level indication for industrial tanks and vessels. Manufactured to DIN7081 tolerances, this reflex sight glass improves readability at a glance, even in dark or turbulent media. Download the datasheet or request a batch Certificate of Analysis (COA) below.
Why choose DIN7081 reflex level gauge glass?
- Standardized dimensions: We produce to DIN7081 so parts interchange with common level gauge housings and fittings.
- High contrast: The reflex profile enhances liquid/vapor contrast for instant visual reading.
- Chemical & thermal resistance: Borosilicate glass (standard) resists many process fluids and thermal cycles.
- Replaceable & serviceable: Disc and tube formats fit three-piece and cartridge housings for fast onsite maintenance.
- Traceable quality: COA, dimensional reports and batch testing available on request.
Product at a glance
| Soda-lime | Borosilicate | Aluminosilicate | Alkali resistance | |
|---|---|---|---|---|
| Pressure resistant performance | 10–40 Bar | 10–64 Bar | 10–320 Bar | 10–400 Bar |
| Thermal Shock | 150℃ | 280℃ | 280℃ | 280℃ |
| Transition temperature | 490℃ | 550℃ | 720℃ | 820℃ |
| Vertical relaxation temperature | 530℃ | 590℃ | 790℃ | 890℃ |
| Softening point | 700℃ | 820℃ | 920℃ | 950℃ |
| Heat resistance | ≤180℃ | ≤300℃ | ≤375℃ | ≤375℃ |
| Density | 2.5 g/cm³ | 2.21 g/cm³ | 2.60–2.70 g/cm³ | 3.4–3.95 g/cm³ |
| Young’s modulus | 72 GPa | 66 GPa | 84 GPa | 112 GPa |
| Flexural strength | 120–160 MPa | 120–160 MPa | 240–320 MPa | 420–450 MPa |
| Water resistance (ISO 719) | Level 1 | Level 1 | Level 1 | Level 1 |
| Acid resistance (DIN 12116) | A1 | A1 | A1 | A1 |
| Alkali resistance (ISO 695) | A2 | A2 | A2 | A1 |
Features & advantages
- Reflex optics: Built-in prism surface reflects light to create a high-contrast level line.
- Easy readout: The Visual level shows brightly without auxiliary lighting in most cases.
- Durable finish: Polished optical surfaces reduce fouling and simplify cleaning.
- Custom machining: Holes, countersinks, and edge finishes per drawing (DWG/STEP accepted).
Variants & compatibility
We offer reflex discs and tubes for common level gauge types:
- Three-piece level gauge assemblies (replaceable disc)
- Cartridge/tube style level gauges (replaceable cartridge)
- Transparent + reflex hybrid windows for dual-read applications
- Alternate materials on request: soda-lime (DIN8902), fused silica (JGS1) for UV/laser environments
Installation & handling notes
- Use compliant gaskets to avoid point loading and edge stress.
- Do not attempt to cut or drill glass after manufacture — specify hole locations before production.
- For thermal cycling, confirm wall thickness and mounting allowances with our engineering team.
- Keep batch COA and dimensional report with installation records for audits.
Downloads
DIN 7081 Reflex Level Gauge： DIN7081 Reflex Level Gauge Glass — Datasheet
FAQ
- 1. What is DIN7081?
- DIN7081 is the German standard that defines dimensions and tolerances for level gauge glass discs and tubes. We manufacture to those dimensions for interchangeability.
- 2. How does a reflex level gauge glass differ from a transparent?
- Reflex glass uses a prism-like surface to reflect light. Therefore, it produces a bright, high-contrast level line against liquid, which improves readability compared to plain transparent glass in many process conditions
- 3. Can I replace my existing discs with DIN7081 reflex parts?
- Yes — if your housing conforms to DIN7081. However, confirm gasket type and seat dimensions before ordering .
- 4. Can you make custom sizes or holes?
- Yes. Upload your DWG/STEP file using the Request Quote link and we will confirm manufacturability and lead time.
