The BM26A-7000 is a magnetic level indicator (MLI) for extreme operating conditions and liquid interface applications. The level gauge is particularly suitable for continuous level measurement of high-temperature or high-pressure liquids in chemical, petrochemical and refining processes or in boiler applications of various industries. It is equally suitable for interface measurement in oil/water separators or similar installations. For level monitoring of corrosive products in pressurised tanks up to 40 barg / 580 psig, the PTFE-lined version of the MLI is the instrument of choice.
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The magnetic flaps of the BM26A-7000 are housed in an IP68 rated, hermetically sealed glass tube. The level indicator provides highly visible local level indication. There is absolutely no power supply needed. However, in applications with more advanced signal output requirements, the BM26A-7000 can be easily equipped with optional limit switches or a reed-chain level transmitter providing analogue or digital output signals.
Product highlights
- Dedicated version for high temperature and pressure conditions
- Large choice of materials, e.g. 316L, 304L, alloy C276, alloy 625
- PTFE-lined version for corrosive liquids up to +200°C / 192°F and 40 barg / 580 psig
- Float designed for low densities down to 370 kg/m3 / 23.09 lb/ft3
- Flaps housed in hermetically sealed glass tube (IP68)
- Thermal insulation for high temperatures, electric heat tracing, heating/cooling system, heat protective enclosure
- Highly visible level indication works without power supply
- Available with optional reed switches (3-wire, NAMUR) or reed-chain level transmitter (4…20 mA/HART®7, FF, PA output)
Typical applications
Power generation
- Feedwater heaters, industrial boilers, boiler drums, flash drums, hot wells
Petrochemical industry, chemical industry
- Alkylation units
- Propylene vessels
- Chlorine vessels
- Blowdown/flash tanks
- Pressurized tanks with acids (nitric, sulfuric) or solvents (acetone, toluene, xylene)
- Naphtha
- Gas condensate
- Alcohols
Oil and gas industry
- Oil/water separators
- Surge tanks, gas chillers, deaerators
Technical data
Measurement principles | Float in bypass |
Measured media | Liquids |
Contact to measured medium | Yes |
Interface measurement | Yes |
Measuring range (liquids) |
0.3…5.5 m/ |
Process pressure (relative) |
-1…400 barg/ |
Process temperature |
-196…+400°C/ |
Wetted parts | Austenitic stainless steel (1.4404/316L), Nickel-chromium-molybdenum-niobium (2.4856/Alloy 625), Nickel-chrome-molybdenum-tungsten alloy (2.4819/Alloy C276), Borosilicate glass 3.3, Titanium coated with ECTFE (Ethylene ChloroTriFluoroEthylene), PTFE-lined stainless steel (1.4404/316L), Titanium |
Process seals | 316L/graphite (spiral-wound), Aramid, Graphite, Polytetrafluoroethylene (PTFE) |
Accuracy (liquids) |
±10 mm/ |
Approvals/Standards
Certificates/Approvals Ex | ATEX, IECEx |
Certificates/Approvals Others | ASME B31.1, ASME B31.3, NACE, PED/EN 13445 |
Ingress protection | IP68 |
Communication
Digital outputs | FOUNDATION™ fieldbus, HART®, PROFIBUS PA |
Discrete outputs | Limit switches |
Analogue outputs | 4…20 mA |