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131 T

SBEM’s Open Scale Target Reading Type Level Indicator – Model 131 T is a reliable and economical float-actuated level gauging solution, designed for accurate measurements in non-pressurized tanks such as cone roof, flat roof, and floating roof, underground, and in-service tanks. Built for clean, non-corrosive liquids, it offers a highly visible, maintenance-free level indication system based on buoyancy, where the guided or unguided float moves the target indicator across gauge boards. With wetted parts available in SS304 or SS316, and support for installation on blanketed tanks using a liquid seal assembly, it suits both standard and volatile fluid applications. It offers simple mounting options, optional volume indication, and visibility from a distance. Float sizes range from 100 mm to 400 mm, supporting tank heights up to 20 meters. Designed with global industrial compatibility in mind, SBEM’s Model 131 T delivers durability, precision, and ease of installation, making it a dependable choice for international oil & gas, water treatment, and chemical storage facilities.

  • Features
    • Simple, low cost and reliable level gauge.
    • Wetted parts available in SS304 / SS316.
    • Suitable for installation on “tank in service”.
    • Indicator rolls on the gauge board with the help of Nylon rollers.
    • Can be used for the applications with volatile liquid or inert gas blanketing by using liquid seal assembly.
    • Large numerals visible from a distance.
    • Supplied with all hardware required for installation.
    • Simple installation and commissioning.
    • No maintenance required.
  • Specification
    Type Float actuated target reading
    Range Up to 20 meters (Depends on diameter of selected float)
    Service Clean and clear non-corrosive liquids
    Resolution 10 mm on the gauge board
    Markings Minor markings at every 100 mm in black (40 mm high) and major markings at every 1000 mm in red (70 mm high)
    Floats Not specified
    Fittings (a) Guide wire spring assembly with SS 316 guide wires – 2 Nos.
    (b) 900° elbow assembly in cast Aluminium polyurethane painted with SS316 pulley and Teflon bush – 2 Nos.
    (c) Guide wire anchor (CS / SS304 / SS316) – 1 No.
    (d) Indicator assembly in Aluminium + SS with SS316 floats cable – 1 No.
    (e) Aluminium polyurethane painted gauge boards {Total Gauge board length = (tank height + 200) mm} with mounting brackets and suitable hardware as per tank height.
    Optional (a) Liquid seal assembly for 200 / 300 / 600 mm WC (water column) with transformer oil as sealant liquid and piping in GI (Optional piping in SS).
    (b) Operation checker assembly with wooden handle and nylon rope.
    Notes 1) Accuracy mentioned is at specific gravity equal to 1.
    2) For unguided 100 mm Ø float, a perforated stilling pipe (150 NB min) must be provided to avoid float swinging. For such applications, guide wires and bottom anchor are not required.
  • Application
    • For tank height up to 10 meters, generally guide Rod assembly is recommended.
    • Liquid seal assembly is recommended for blanketed tanks or tanks with the volatile products (up to 600 mm WC).
    • Checker assembly facilitates periodic testing of float for correct operation.
    • Minimum two gauge boards are supplied (100 mm & 200 mm). Measuring range can be less than 100 mm also.
  • Service Downloads
    Leaflets: