LMG200
ABB version optimised for standard conditions, based on KM26 experience with a more focused configuration.
Magnetic level gauges
ABB magnetic level indicators
Continuous local indication without pressurised glass or electrical power. The bypass chamber follows the vessel level, and the float magnetically operates the external indicator.
Flagship / severe service
KM26
The ABB/K-TEK platform for demanding oil and gas, chemical, petrochemical and power applications. Built to the specified materials, pressure/temperature, density and connections.
Up to 345 barProcess pressure
-196…538 °CWide range
0.25 SGSpecified minimum specific gravity
InterfaceVery small ΔSG with a dedicated float
MW05 MagWave
Dual-chamber system: magnetic indication and guided wave radar in a separate chamber. Designed for greater redundancy, for example in power/feedwater heaters.
Complete the system
Add a transmitter and switches without opening the process
External LMT200
Chamber-mounted magnetostrictive transmitter: follows the float magnet and provides 4–20 mA/HART without electronics in contact with the fluid.
LMS100 / LMS200 / MS41
Externally mounted magnetically operated switches. They provide adjustable high/low thresholds without adding dedicated process connections.
When to use it / when to consider alternatives
Magnetic level gauges: practical guidance
A good choice when
- local indication is required without power
- the process is toxic, corrosive or at high pressure/temperature
- you want to add an external transmitter and switches
- total level or interface measurement is required
Check carefully when
- the product may crystallise or form deposits
- density changes significantly with the process
- solids or slurry may jam the float
- the chamber equalises slowly
Size for actual density, pressure and temperature, particularly for interface measurement.
Provide valves and drainage for commissioning and maintenance.
The chamber must be vertical and connected to the vessel so that it follows the actual level.
Design these without obstructing reading or maintenance.
Position and diameter influence equalisation and deposits.
KM26 with LMT200 and switches, or MW05, separates indication, transmission and alarms.
ABB documentation
ABB datasheets and manuals
Download the documents for your model. Shared manuals, protocols and versions are identified in each document card.
KM26S / KM26T
Separate datasheets for side-mounted KM26S and top-mounted KM26T. Shared KM26 / MW05 / LMG / EC manual.
LMG200
LMG200 datasheet and LMG family manual, shared with KM26 / MW05 / EC.
MW05 MagWave
Dual-chamber system datasheet, shared mechanical manual and MW05 configuration guide. The associated radar requires the manual for its own version.
LMT200 · external transmitter
Select the HART or FOUNDATION Fieldbus manual for the installed transmitter.
LMS100
English manual rev. C (08.2024); Italian manual rev. A (01.2016), an earlier edition.
LMS200
MS41
Request a quotation
Configure the magnetic level indicator
Technical FAQ
Frequently asked questions
When should I choose a magnetic indicator instead of radar?
When local indication independent of power is needed and the liquid process is compatible with a chamber and float. Radar and a magnetic indicator can also be used together for redundant measurement.
KM26 or LMG200?
KM26 is the custom platform for severe conditions and a broad choice of materials/configurations; LMG200 is optimised for standard general-industry applications.
Can I add a 4–20 mA signal to a KM26?
Yes. A typical configuration uses an LMT200 outside the chamber, without direct process contact.
Can I add switches without stopping the plant?
Yes. LMS/MS magnetic switches are mounted externally, and their setpoints can be adjusted without changing the process piping.
Can a magnetic level gauge also measure an interface?
Yes, provided the float is designed for the fluid densities and the interface has sufficient ΔSG.
What can jam a magnetic level indicator?
Deposits, solids, crystallisation, extreme viscosity or a chamber not properly equalised with the vessel can impair float movement.