⭐ Trusted Reflex Level Gauge Glass Manufacturer

High-Visibility Reflex Level Gauge Glass for Accurate Liquid Level Indication

Premium tempered borosilicate reflex gauge glass with precision-prismatic grooves for sharp, high-contrast liquid level indication. Manufactured to DIN 7081, BS 3463, JIS B 8211, and MIL-G-16356D standards. Ideal for boilers, steam drums, pressure vessels, and process tanks where reliable visual monitoring is critical.

DIN 7081 / BS 3463 Certified Tempered Borosilicate 3.3 Type A & Type B Available
Request A Quote → View Products
Reflex Level Gauge Glass - Tempered Borosilicate with Prismatic Grooves
Premium Reflex Gauge Glass DIN 7081 • BS 3463 • Up to 400°C / 400 bar
35 bar Saturated Steam Rated
Custom Sizes Available
🔬 Tempered Borosilicate 3.3
✅ DIN 7081 Certified
🔥 Up to 400°C
📏 Type A & B Standard Sizes
🌎 Worldwide Supply

Reflex Gauge Glass Types

Type A and Type B Reflex Gauge Glass — Standard Sizes & Applications

Reflex Level Gauge Glass Technical Specifications

Manufactured from thermally pre-stressed borosilicate glass 3.3 with precision-molded prismatic grooves, delivering reliable high-contrast liquid level indication across demanding industrial applications.

📋 Product Parameters

Material Tempered Borosilicate Glass 3.3 / Aluminosilicate (on request)
Coefficient of Expansion 3.3 ± 0.1 × 10⁻⁶ K⁻¹ (20–300°C)
Softening Point 820 ± 10°C
Tensile Strength > 120 N/mm²
Standard Types Type A (Width 30mm) / Type B (Width 34mm) / Type H (Width 34mm, Thickness 22mm)
Standard Thickness 17mm (Type A & B) / 22mm (Type H)
Length Range 95mm to 400mm (standard sizes 0–9)
Groove Design Prismatic 90° V-grooves on process side
Edge Finish Ground, polished, or fire-polished

🔬 Performance & Standards

Max Pressure (Steam) Up to 35 bar (saturated steam)
Max Pressure (Non-Steam) Up to 400 bar
Max Temperature Up to 400°C (non-steam); 430°C at lower pressures
Thermal Shock Resistance Excellent (ΔT up to 140 K)
Chemical Resistance Acid class 1, Alkali class 2, Hydraulic class 1 (per DIN standards)
International Standards DIN 7080 / 7081, BS 3463, JIS B 8211, MIL-G-16356D, Ö-Norm M 7354

💡 How Reflex Gauge Glass Works

Reflex gauge glass features precision-molded 90° prismatic grooves on the process side. Light entering the glass is absorbed by liquid (appearing black) and reflected by vapor or gas (appearing silvery-white), creating a sharp, high-contrast liquid level indication without any moving parts or external power source.

Standard Size Chart (Type A & Type B)

Reflex gauge glass is available in standard sizes 0 through 9, with custom lengths and widths available upon request.

Size No. Length (mm) Type A Width (mm) Type B Width (mm) Thickness (mm)
0 95 30 34 17
1 115 30 34 17
2 140 30 34 17
3 165 30 34 17
4 190 30 34 17
5 220 30 34 17
6 250 30 34 17
7 280 30 34 17
8 320 30 34 17
9 340 30 34 17

Why Choose Our Reflex Gauge Glass

Precision-engineered reflex glass delivering superior visibility, mechanical strength, and long service life in demanding industrial environments.

👁️

Superior Visual Contrast

Prismatic 90° grooves create a sharp black-and-white contrast between liquid and vapor phases, allowing clear level reading even in areas with only ambient lighting.

🛡️

High Mechanical Strength

Thermally pre-stressed borosilicate glass with tensile strength exceeding 120 N/mm², resistant to pressure, impact, and thermal shock.

🔥

Boiler Water Resistance

Extremely resistant to attack from boiler water and condensates. Ideal for steam drum and feedwater level monitoring applications.

⚗️

Excellent Chemical Resistance

Acid class 1 and alkali class 2 per DIN standards. Resistant to most industrial chemicals, acids, and alkalis.

📐

Precision Manufacturing

Molded grooves with exact dimensional tolerances. Double-sided polishing and toughening for optimal optical clarity and durability.

🌍

International Standards

Manufactured to DIN 7081, BS 3463, JIS B 8211, and MIL-G-16356D. Complete traceability and material certifications available.

Reflex Gauge Glass Applications

Trusted across industries where accurate, direct-reading liquid level indication is essential for safety and process control.

🔥
Boiler Steam Drums

Optimal solution for saturated steam up to 35 bar. Direct water level indication in boiler drums.

💧
Feedwater Heaters

Reliable level monitoring in feedwater heaters, deaerators, and condensate tanks.

🛢️
Pressure Vessels

Liquid level indication in process vessels, separators, and storage tanks.

⚗️
Chemical Processing

Non-steam applications up to 400 bar and 400°C. Resistant to most chemicals.

🏭
Power Generation

Steam drum level monitoring, condensate receivers, and feedwater systems.

⚙️
Process Industries

Pulp & paper, petrochemical, pharmaceutical, and food processing level gauges.

🚢
Marine & Offshore

Boiler water level indication and tank monitoring in marine environments.

🏗️
OEM Level Gauge Manufacturing

Supplied to leading gauge manufacturers including Jerguson, Penberthy, Klinger, and Bonetti.

Why Choose Our Reflex Gauge Glass

A reliable manufacturing partner providing certified reflex gauge glass to global industrial customers.

Reflex Gauge Glass Manufacturing Facility
  • ✓ Certified to International Standards — Manufactured in accordance with DIN 7081, BS 3463, JIS B 8211, and MIL-G-16356D specifications.
  • ✓ Premium Borosilicate 3.3 Material — High-purity tempered borosilicate glass with low thermal expansion and excellent chemical resistance.
  • ✓ Precision Groove Molding — 90° prismatic grooves molded with exact tolerances for optimal light refraction and level indication.
  • ✓ Full Size Range Available — Standard sizes 0–9 in Type A (30mm) and Type B (34mm). Custom lengths and widths on request.
  • ✓ Strict Quality Inspection — Every glass undergoes dimensional inspection, visual examination, and pressure testing.
  • ✓ Global Export Experience — Professional packaging with protective materials and full documentation for international delivery.

International Standards & Compliance

Our reflex gauge glass is manufactured and certified to meet the most stringent international specifications.

📜
DIN 7080 / 7081

German Standard for Gauge Glass

🇬🇧
BS 3463

British Standard for Observation & Gauge Glasses

🇯🇵
JIS B 8211

Japanese Industrial Standard for Boiler Gauge Glasses

🎖️
MIL-G-16356D

US Military Specification for Boiler Water Gauges

🇦🇹
Ö-Norm M 7354

Austrian Standard for Long Gauge Glasses

✅
ISO 9001:2015

Quality Management System

Frequently Asked Questions

Common questions about reflex level gauge glass selection, installation, and applications.

What is the difference between Type A and Type B reflex gauge glass? +
Type A has a width of 30mm, while Type B has a width of 34mm. Both are 17mm thick. Type A is the standard width for most general-purpose level gauges, while Type B offers a wider viewing area and is often preferred for larger gauge assemblies or where greater visibility is required. Type H is also available with 34mm width and 22mm thickness for higher pressure applications.
Why is reflex gauge glass not recommended for steam applications above 35 bar? +
Reflex gauge glass cannot be protected with a mica shield, which is commonly used on transparent gauge glass to protect it from steam attack at higher pressures. For saturated steam above 35 bar, transparent gauge glass with mica protection is recommended instead. Reflex glass is ideal for steam service up to 35 bar, and for non-steam applications it can handle pressures up to 400 bar and temperatures up to 400°C.
How does reflex gauge glass indicate the liquid level? +
Reflex gauge glass has precision-molded 90° prismatic grooves on the process side. When light enters through the glass, the liquid-filled portion absorbs the light and appears black, while the vapor or gas space reflects the light and appears silvery-white. This creates a sharp, high-contrast level indication that is easy to read. The glass itself requires no external illumination in adequately lit areas.
What is the maximum operating pressure and temperature? +
For saturated steam applications, reflex gauge glass is rated up to 35 bar. For non-steam applications, it can be used at pressures up to 400 bar and temperatures up to 400°C. At lower pressures, temperatures up to 430°C may be achievable. Specific ratings depend on the glass dimensions, gasket material, and gauge assembly design.
Can you supply custom sizes? +
Yes. While standard sizes 0–9 cover lengths from 95mm to 400mm, we can manufacture custom lengths, widths, and thicknesses to match your existing gauge assembly. Please provide the required dimensions, maximum operating temperature and pressure, and any specific standard requirements for a quotation.
What standards does your reflex gauge glass meet? +
Our reflex gauge glass is manufactured in accordance with DIN 7080 / 7081 (German), BS 3463 (British), JIS B 8211 (Japanese), MIL-G-16356D (US Military), and Ö-Norm M 7354 (Austrian) standards. Aluminosilicate glass is also available on request for higher temperature applications.
How should reflex gauge glass be installed and maintained? +
Always use new gaskets when installing gauge glass. The glass must be centered in the fitting to avoid glass-metal contact. Tighten cover bolts gradually in a cross-pattern sequence, starting from the middle. Never reuse a gauge glass that has been exposed to process conditions. Inspect regularly for chips, cracks, or clouding, and replace immediately if any damage is found.

Get Your Reflex Gauge Glass Quote Today

Tell us your specifications and application requirements. Our engineers will provide a suitable reflex gauge glass solution with full certifications.

  • Factory direct quotation
  • DIN 7081 / BS 3463 certified
  • Type A & Type B standard sizes in stock
  • Custom sizes and OEM support

Request Your Quote

We'll get back to you within 3 hours.

    🔒 Your information is secure. We never share your data with third parties.

    Scroll to Top