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    Reflex Gauge Glass

    Prismatic reflex sight glass plates for clear and reliable liquid level monitoring in industrial boilers and steam systems.

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    BOILER GAUGE GLASS

    Reflex Gauge Glass
    Type B Prismatic Boiler Sight Glass Plates

    Our Reflex Gauge Glass provides clear and reliable liquid level indication in industrial boilers, steam equipment and compatible fluid monitoring systems. Featuring precision-moulded prismatic grooves, reflex glass enhances the contrast between liquid and vapour, allowing operators to identify water levels quickly and accurately.

    Advanced Thermal Supplies stocks and supplies Type B Reflex Gauge Glass in sizes B1 and B3–B9. Type A Reflex Gauge Glass is also available on request.

    Key Features & Benefits:

    • Enhanced Level Visibility – Prismatic grooves create a distinct contrast between liquid and vapour for easy water level identification.
    • Reflex Prism Design – Uses light reflection and refraction to improve visibility without requiring additional illumination in suitable conditions.
    • Industrial Applications – Designed for compatible boiler water level gauges and industrial liquid level indicators.
    • Multiple Sizes Available – Type B Reflex Gauge Glass stocked in B1 and B3–B9 sizes.
    • Type A Available – Alternative Type A Reflex Gauge Glass can be sourced on request.

    Reflex Gauge Glass – Available Sizes & Dimensions:

    Advanced Thermal Supplies stocks and supplies Type B Reflex Gauge Glass in sizes B1 and B3–B9. Type A Reflex Gauge Glass is also available on request.

    Both types feature a standard thickness of 17 mm. Type A has a width of 30 mm, while Type B has a width of 34 mm.

    Size Length (mm) Type A
    Available on Request
    Type B
    Stocked Range
    Width (mm) Thickness (mm) Width (mm) Thickness (mm)
    1 115 30 17 34 17
    2 140 30 17 34 17
    3 165 30 17 34 17
    4 190 30 17 34 17
    5 220 30 17 34 17
    6 250 30 17 34 17
    7 280 30 17 34 17
    8 320 30 17 34 17
    9 340 30 17 34 17
    10 370 — — 34 17

    Dimensions are based on the manufacturer's technical specifications. Type B sizes 1 and 3–9 are stocked by Advanced Thermal Supplies. Other sizes and Type A glass are subject to availability. Dimensions may be subject to manufacturer tolerances and modifications.

    Type A Reflex Gauge Glass:

    Type A Reflex Gauge Glass is available on request. Type A glass has a narrower 30 mm width compared with the 34 mm width of Type B. Please contact our team with your required size and quantity for availability and pricing.

    Typical Applications:

    • Industrial steam boiler water level gauges
    • Reflex-type liquid level indicators
    • Steam and condensate monitoring equipment
    • Industrial tanks and compatible pressure vessels
    • Replacement sight glass for boiler maintenance and servicing

    Ordering & Specifications:

    When requesting a quote, please specify your required glass type (A or B), size and quantity. If you are unsure of the correct size, please provide the dimensions of your existing glass or the gauge manufacturer and model number.

    For boiler and pressure applications, glass suitability must be confirmed against the operating temperature, pressure, fluid compatibility and gauge assembly specifications.

    Explore our complete range of boiler and steam products for additional components and industrial maintenance supplies.

    Need assistance selecting the correct reflex gauge glass? Contact Advanced Thermal Supplies with your required size and application details. Our team can assist with product selection, availability and a quotation for your requirements.