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BW 25

Displacer level transmitter for heavy-duty level and interface applications

Continuous measurement of level, liquid-liquid interface or density at extreme process conditions
Measuring range: 0.3…5.5 / 1…18 ft
Density: ≥0.45 kg/l /≥28.1 lb/ft³
-40…+400°C / +752°F; -1…400 barg / -14.5…5801 psig

BW 25 – Version with aluminium housing

BW 25 Displacer level transmitter – Version with aluminium housing

The BW 25 is a loop-powered displacer level transmitter for measuring and/or detecting liquid level or liquid-liquid interface under extreme process conditions. It can deal with corrosive media, high temperatures (up to +400°C / +752°F) and high pressures (up to 400 barg / 5801 psig).

The BW 25 can be used as level indicator without the need of auxiliary power supply. Equipped with a switch module the unit can be used as level switch. With a transmitter module, the unit will function as level transmitter. The three function modes can be combined. Retrofitting the device for receiving add-on functionality is possible without interrupting the process. The BW 25 can also be installed in a bypass chamber, e.g. for applications with agitators.

Product highlights

Transmitter, level switch and indicator in one device
Easy adjustable level switch with max. 2 set points
Can be used as mechanical indicator without auxiliary power supply
Modular design for retrofitting under process conditions
Welded process seal with external mount housing

Typical applications

Tanks with hydrocarbons, solvents, bases at extreme process conditions
Interface measurement with large emulsion layers
Bypass chamber for applications with agitators
Applications in non-hazardous and hazardous areas

Product variants

BW 25 with BM26A-5000

Displacer level transmitter with bypass chamber

All-in-one solution with displacer level transmitter and bypass chamber
Large choice of bypass chamber materials e.g. 316L, 304L, alloy C276, alloy 625
Level or interface indication up to 5.5 m / 18 ft
Ideal for difficult process conditions, e.g. turbulence, foam

Applications

General information

Measurement principle	Displacer
Level measurement type	Continuous measurement
Measured media	Liquid/liquid interface, Liquids
Contact to measured medium	Yes
Interface measurement	Yes
Displacement rod length	0.3…6 m/ 1…20 ft
Measuring range (liquids)	0.3…5.5 m/ 1…18 ft
Process pressure	-1…400 barg/ -14.5…5801 psig
Wetted parts	Austenitic stainless steel (1.4404/316L)
Gaskets	Ethylene propylene diene monomer (EPDM), Fluoroelastomer rubber (FKM/FPM), Kalrez® 6375
Accuracy (full scale)	+1.5%