Float and Board Level Indicator

This durable float and board type level indicator is used for constant, non-pressurized liquid height measurement in atmospheric tanks of non-hazardous fluids.

By virtue of its external pulley assembly tank level gauge design, the float gauge makes use of a custom designed weighted float attached to a highly visible pointer that runs counter to the scale.

The multi-purpose counterweight float type level indicator is best suited as a fire water tank level indicator, and functions well as a molasses tank level indicator as well as diesel storage tank float and board gauge utility.

For the containment of hazardous vapors or evaporation, this durable float and board type tank level indicator may be designed with vapor seal provision.

• Mechanical float-operated level indication.
• Suitable for non-pressurized storage tanks and vessels.
• Stainless steel or polypropylene non-stretching wire rope.
• Dust-free pulley enclosure minimizes friction.
• Easy to install and user-friendly.
• Enlarged scale for clear level visibility.
• Vapor seal option available for evaporating liquids.
• Smooth and reliable level indication using float and pulley mechanism.
• Suitable for overhead and large storage tanks.

• Application: Water, Fire Water, DM Water, Oil, Diesel, Lube Oil, Molasses, Silicates, Glucose & other Non-Pressurized Liquids
• Specific Gravity: Above 0.6 gm/cm³
• Tank Height / Range: 0 to 10 m (Without Wire Rope Guide), Above 10 m (With Wire Rope Guide)
• Operating Temperature: Up to 150°C
• Operating Pressure: Up to 1 Kg/cm²

Movement of Float

The float is placed within the storage tank and floats on the surface of the liquid. The movement of the float will vary depending upon the rise or fall of the liquid level.

Wire Rope and Pulley Mechanism

The float is linked to an external pointer by using a wire rope and pulley system. This system facilitates the transfer of float movements to the pointer installed externally.

Movement of Counterweight

A counterweight is provided to maintain the correct tension of wire rope, which helps to move the pointer efficiently and precisely with the change in liquid level.

Vapor Seal (Optional)

If the application involves any volatile liquid, the indicator is provided with either a vapor seal or a U-seal system to control vapor loss. This helps in smooth functioning of the mechanism.

Level Indication

The movement of the external pointer over a scale gives the indication of the level of the liquid. This helps the operator to monitor atmospheric storage tanks from a safer place without using any external power source.

Material of Construction (MOC)

• Float Metallurgy Options: Polypropylene (PP), SS304, or SS316 stainless steel.
• Guide Wire Material: SS316 stainless steel or multi-strand Nylon wire rope variants.
• Anchor & Tensioner Metals: Fabricated utilizing heavy-duty Carbon Steel, SS304, or SS316 stainless steel.
• Board Scale Composition: Weather-resistant Aluminum or high-visibility Pure White Polypropylene (PP) substrates.

Seal Configurations

• Vapor Seal: Integrated mechanical layout designed specifically for hydrocarbon and chemical systems to block gas venting.
• Liquid U-Seal: Fluid-trapping configuration engineered to contain volatile or hazardous tank vapors.
• Dust Proof Assembly: Enclosed pulley housing layout for outdoor environments containing high debris.

Mechanical & Structural Options

• Scale Graduation Units: Calibrated markings available in standard Centimeters (cm), Millimeters (mm), or Custom Volumetric Liters.
• Pulley Housing Assemblies: Rugged Cast Aluminum housings paired with self-lubricating Delrin rollers or dual-bearing assemblies.
• Counterweight Components: Adjustable Carbon Steel or lead-filled balance weights matching the specified float volume.

Measuring & Process Ranges

• Operational Level Range: Standard spans from 1 Meter to 30 Meters maximum vertical travel.
• Process Medium Compatibility: Factory configurations calibrated for specific gravities ranging from 0.6 up to 1.5.

Ancillary Automation Modules

• Limit Switch Integration: Optional field-adjustable proximity switches or microswitches for High/Low level automation control loop triggers.
• Electronic Tracking Transmitters: Upgradable with a 4-20mA smart current loop analog transmitter output or digital RS485 Modbus telemetry module.

Suitable for Atmospheric Storage Tanks: Float Board Level Indicator can be ordered in optional vapor seal or U-seal configuration to suit those applications where volatile liquid level has to be measured and minimize the risk of vapor losses.

Reliable Mechanical System: A simple mechanism ensures continuous monitoring of liquid level without any need of electrical source, thus ensuring reliability for industrial purpose.

Durable Construction: Constructed using SS316 material and corrosion resistant wire ropes, this indicator can be used for measuring level of water, chemicals, oils and other compatible fluids.

Easy Distance Measurement: A large dial with a pointer ensures clear visualization of liquid level, thus it can be used in fire water tanks, chemical storage tanks, atmospheric storage tanks etc.