A marine-approved hydrostatic sensor designed for fuel and freshwater tanks up to 1.6 meters, featuring a high-purity ceramic diaphragm and field-adjustable HART communication for precise shipboard level monitoring.
Managing fluid levels in confined vessel spaces requires instrumentation that can withstand the rigorous vibration and thermal profiles of a marine engine room. The LMK 458H is specifically engineered to address the complexities of monitoring fuel oil and freshwater within settling and service tanks that do not exceed 1.6 meters in height. The primary value of this series lies in its hydrostatic measuring principle, which eliminates the mechanical failures common in float-based systems caused by fuel sludge or tank turbulence. The integration of HART communication protocols allows for precise field re-ranging, enabling the 4-20mA signal to be scaled exactly to the tank’s geometry and the specific gravity of the media, whether transitioning from heavy fuel oil to low-sulfur marine gas oil or freshwater. This flexibility is critical for maintaining inventory on a vessel where a single sensor may need to serve as a drop-in replacement for multiple tank locations during a voyage.
The technical integrity of the LMK 458H is underscored by its 99.9% pure Al2O3 ceramic diaphragm. Unlike standard stainless steel sensors which may suffer from hydrogen embrittlement or physical deformation over time when exposed to aggressive additives, this high-purity ceramic interface offers exceptional long-term stability and resistance to the abrasive particles often found in bunker fuels. Furthermore, the housing is constructed from 316L stainless steel and paired with a TPE-U cable jacket rated for temperatures up to 125°C, ensuring the sensor remains operational even in high-heat zones near the main engine or boiler feed systems. Compliance is simplified for the vessel’s technical team as the series carries comprehensive type approvals from Lloyd’s Register, Germanischer Lloyd, and the China Classification Society. For installations in explosive atmospheres, such as fuel oil storage areas or purge tanks, the ATEX intrinsic safety certification ensures that the unit meets strict hazardous area requirements, providing a reliable and safe solution for critical level monitoring tasks across the fleet.
LMK458H Marine Approved Hydrostatic Level Transmitter
- Part No: 76F-1600-1-1-C-I-1-4-1-005-000
- Pressure Range: 1.6
- Units: mH2O
- Reference Type: Gauge / Vented (atm to +P)
- Output Signal: 4 to 20 mA, 2 wire
- Accuracy: 0.2% FS
- Installation Type: Probe version with nose cone
- Housing Material: Stainless Steel 316L
- Diaphragm Material: Ceramic Al2O3 99.9%
- Media Exposed Seals: FKM
- Cable Type: TPE-U (125degC max)
- Cable Length: 5
- Cable Length Units: Metres (m)
- Optional Extras:
- ATEX Intrinsic safety approval
- HART communications ready