Magnetic Bypass Level Indicators Series BM26A-1000, BM26A-3000, BM26A-6000, BM26A-7000, BM26A-8000

The BM26A series comprises robust magnetic bypass level indicators designed for direct level and interface measurement of liquids without requiring any power supply. They feature an all-metal construction with flaps housed in a hermetically sealed glass tube (IP68) and measuring ranges up to 5.5 m (longer on request). Each model is optimised for specific applications: BM26A-1000 for standard liquids, BM26A-3000 for corrosive media, BM26A-6000 for cryogenic applications, BM26A-7000 for extreme temperatures and pressures, and BM26A-8000 for redundant measurement combined with radar transmitters.

Operating Principle

A magnetic float travels inside a bypass chamber connected to the tank. As the float moves with the liquid level, its magnetic field rotates bi-coloured flaps in the external indicator rail, providing a clear, contact-free visual indication of the actual level.

Characteristics by Series

BM26A-1000

• Materials: Standard metallic construction

• Temperature: –70…+200 °C

• Pressure: –1…40 bar(g)

• Measuring range: 0.3…5.5 m (longer on request)

• Medium density: 700…1200 kg/m³

• No power supply required

BM26A-3000

• Materials: Polypropylene, PVC or PVDF for high corrosion resistance

• Temperature: –20…+100 °C

• Pressure: 0…6 bar(g)

• Measuring range: 0.5…4 m (longer on request)

• Medium density: 560…1200 kg/m³

• No power supply required

BM26A-6000

• Materials: Special design for cryogenic service

• Temperature: –196…+200 °C

• Pressure: –1…40 bar(g)

• Measuring range: 0.3…5.5 m (longer on request)

• Medium density: 500…1200 kg/m³

• No power supply required

BM26A-7000

• Materials: High-pressure resistant construction

• Temperature: up to +400 °C

• Pressure: up to 400 bar(g)

• Measuring range: 0.3…5.5 m (longer on request)

• Medium density: 370…1200 kg/m³

• No power supply required

BM26A-8000

• Materials: Combined with radar transmitters

• Temperature: up to +400 °C

• Pressure: up to 400 bar(g)

• Measuring range: 0.3…5.5 m (longer on request)

• Medium density: 370…1200 kg/m³

• Redundant measurement with guided wave radar (TDR), FMCW radar or additional float switches; visual indicator itself requires no power

Main Applications

• Level and interface measurement in virtually all industries

• Tanks containing aggressive chemicals, cryogenic liquids, high-temperature/high-pressure media

• Critical processes requiring redundant monitoring (petrochemical, oil & gas, power generation, etc.)

Advantages of Magnetic Bypass Level Indicators

• Cost-effective: no external power supply needed

• Extremely reliable: rugged all-metal design, hermetically sealed glass tube (IP68), unaffected by foam, vapour or conductivity

• Safe: non-contact visual indication, suitable for hazardous-area applications

• Highly versatile: wide temperature and pressure ranges, customisable lengths up to 5.5 m+, optional integration with radar transmitters for redundancy and remote transmission