High-Accuracy ABB LMT200.N2.S6.R1.B1.D4.L2.H1 External-Mount Magnetostrictive Level Transmitter with HART
August
05, 2026
Applying the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 for Precise External-Mount Level Measurement: Engineering, Installation and Lifecycle Considerations
The ABB LMT200.N2.S6.R1.B1.D4.L2.H1 is an external-mount magnetostrictive level transmitter configured for high-accuracy liquid level and interface measurement. Installed alongside a compatible magnetic level gauge, the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 converts float position into a continuous electronic signal without direct contact between the transmitter electronics and the process fluid.
How Magnetostrictive Level Measurement Works
A current pulse travels through the LMT200 sensor tube and interacts with the magnetic field of the float inside the adjacent level-gauge chamber. The resulting torsional wave returns to the sensing electronics, and the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 calculates the float position from the measured travel time.
Because the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 mounts externally, it can provide continuous measurement while retaining the local visual indication of a magnetic level gauge. The design supports level or interface duties, depending on the chamber, float and application configuration.
Performance That Supports Demanding Process Measurement
Measurement accuracy: +/-0.01% of full scale or 1.27 mm, whichever is greater, under ABB factory reference conditions.
Repeatability: +/-0.005% of full scale or 0.315 mm, whichever is greater.
Update rate: 10 measurements per second.
Minimum measuring span: 76.2 mm; consult ABB when a smaller span is required.
Output: Loop-powered 4-20 mA with HART 7 for this H1 configuration.
Ingress protection: IP66 / NEMA 4X dual-compartment enclosure.
For stable performance, the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 must be engineered together with the magnetic level gauge, float, chamber dimensions and process-fluid properties. Installation conditions and float hysteresis can influence total application accuracy beyond the electronic transmitter specification.
Reading the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 Configuration
| Code | Selected configuration |
|---|---|
| N2 | North American explosionproof / flameproof approval selection |
| S6 | 316/L stainless-steel probe material |
| R1 | 5/8-inch rigid probe for -80 to +232 degrees C service, subject to the probe selection guide |
| B1 | Bottom-mounted electronics with display facing left |
| D4 | 316L stainless-steel housing with two 1/2-inch NPT entries |
| L2 | Display with through-the-glass operating buttons and glass cover |
| H1 | Single 4-20 mA output with HART |
Engineering Checks Before Installation
Match the mechanical arrangement. Verify that the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 probe length and mounting orientation match the magnetic level gauge chamber.
Review process conditions. Confirm temperature, pressure, fluid density, interface behavior and float selection before fitting the ABB LMT200.N2.S6.R1.B1.D4.L2.H1.
Validate electrical design. Check loop voltage, HART load resistance, grounding, cable entries and hazardous-area requirements for the ABB LMT200.N2.S6.R1.B1.D4.L2.H1.
Document the measured range. Configure lower and upper range values, damping, alarm direction and device tag, then retain the final ABB LMT200.N2.S6.R1.B1.D4.L2.H1 settings.
Maintenance and Replacement Strategy
Routine checks for the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 should include the external clamps, sensor-tube alignment, enclosure seals, cable entries, loop response and comparison with the chamber's visual indication. Any discrepancy should be investigated before changing calibration.
For replacement work, the full ABB LMT200.N2.S6.R1.B1.D4.L2.H1 code is essential. Approval, probe material, probe style, mounting orientation, housing, display and output selections must all be checked, together with the required probe length and any options listed after the base code.
For a quotation or compatibility review, provide the complete ABB LMT200.N2.S6.R1.B1.D4.L2.H1 order code, magnetic level gauge model, measuring length and process conditions. These details help confirm that the ABB LMT200.N2.S6.R1.B1.D4.L2.H1 configuration fits the intended level-measurement application.