level indicator-bm 26 A

BM 26 A

Magnetic bypass level indicator for liquid and liquid-liquid interface applications

  • Continuous level indication; no power supply needed
  • Measuring range: 0.3…5.5 / 1…18 ft (longer on request)
  • Density: 0.48…3 kg/l / 30…187.3 lb/ft3
  • -196…+300°C / -321…+570°F; -1…100 psig / -14…1450 psig

The BM 26 A is a universal bypass level indicator with IP68 / NEMA 6-6X indicator rail. The device indicates liquid level or liquid-liquid interface via a float in the bypass chamber which is magnetically coupled with the magnets of an external mount rail with flappers or index. The magnetic level indicator operates over a wide temperature range and high pressure. It is also the perfect device when no power is available.

  • Large variety of accessories and options: special materials, valves, insulation, hazardous area approvals, limit switches, level transmitters etc.
  • Flaps housed in a hermetically sealed Pyrex® glass tube (IP68 / NEMA 6-6X)
  • Rugged stainless steel design: low or no maintenance
  • Highly visible level indication works without power supply
  • Level applications in non-hazardous and hazardous areas
  • Storage and process tanks
  • Tanks with clean liquids, hydrocarbons to water-based liquids
  • Bypass chamber for tanks with agitators
Measurement principles Float in bypass
Level measurement type Continuous measurement
Measured media Liquid/liquid interface, Liquids
Contact to measured medium Yes
Interface measurement Yes
Measuring range (liquids) 0.3…5.5 m/
1…18 ft
Process pressure (relative) -1…100 barg/
-14.5…1450 psig
Process temperature -196…300°C/
Wetted parts Austenitic stainless steel (1.4404/316L)
Process seals EPDM, FKM/FPM, Kalrez® 6375
Accuracy (liquids) ±10 mm/
±0.4 in

Products Details

Alternative product categoriesFlapper, Flapper indicator, Level gauge, Liquid level gauge, Magnetic bypass, Magnetic level gauges


Certificates/Approvals ExATEX, EAC
Certificates/Approvals OthersNACE
Ingress protectionIP68


Digital outputsFOUNDATION™ fieldbus, HART®, PROFIBUS PA
Binary outputsLimit switches
Analogue outputs4…20 mA

Process connections

Flange connectionsEN (1092-1): DN15…50
ASME (B 16.5): 1/2…2″

*More instruments are available, please liaise with us if any of your required instruments is not listed above.