Description
The EML-500-HV1 is a high-precision vertical sensor unit from Yokogawa Denshikiki, integral to the EML500 series electromagnetic speed log systems for marine navigation. This robust hull-mounted transducer employs electromagnetic induction to measure vessel speed through water with exceptional accuracy, supporting dual-axis configurations for longitudinal and transverse velocity data in demanding maritime conditions.
Application Scenarios
Aboard a trans-Pacific container ship navigating turbulent Kuroshio currents, where inaccurate speed readings from fouled Doppler sensors once skewed fuel optimization and ETA forecasts, inflating bunker costs by 12% amid volatile oil prices, the EML-500-HV1 deploys as the submerged oracle of motion. It pierces these navigational nemeses by generating a stable magnetic field to induce micro-voltages in seawater flow, delivering calibrated outputs that refine course corrections in <1 second—trimming deviations by 28% and ensuring just-in-time arrivals without excess emissions. This seafaring chronicle casts the EML-500-HV1 as the keel-deep keystone, where electromagnetic insight charts safer, greener voyages in the vast blue frontier.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | EML-500-HV1 (Vertical Sensor Unit for Electromagnetic Speed Log) |
| Manufacturer | Yokogawa Denshikiki Co., Ltd. |
| Product Category | Electromagnetic Sensor (hull-mounted transducer for marine speed measurement) |
| Frequency Range | 50 Hz excitation (generates consistent magnetic field for reliable flow detection) |
| Output Signal | Analog voltage proportional to speed (0-40 knots range, ±0.1 knot accuracy for precise navigation) |
| Power Supply | 24 V DC via master unit (low 5 W draw, fused protection for underwater integrity) |
| Communication Protocol | RS-422/485 serial link to master (NMEA 0183 compatible for GPS/ECDIS integration) |
| Environmental Adaptability | -10°C to 60°C operating temp, IP68 submersible to 100 m, biofouling-resistant coating (endures 5-year deployments in saline, high-drag hull zones) |
| Physical Dimensions | 250 mm H x 150 mm D (cylindrical flush-mount, 4.5 kg for seamless keel integration) |
| Installation Method | Flush hull penetration with O-ring seal (welded flange, torque to 50 Nm for vibration-proof fit) |
| Performance Indicators | 0.2 knot resolution, <0.5% FS linearity (IMO A478 compliant for SOLAS-mandated accuracy) |
| Sensor Type | Dual-axis electromagnetic (vertical orientation for stern-tube mounting, supports bottom-track mode) |
Technical Principles and Innovative Values
- Innovation Point 1: Faraday’s Law Electromagnetic Induction: The EML-500-HV1 harnesses precise 50 Hz coil excitation to create a localized magnetic field, inducing voltages proportional to water velocity per Faraday’s principle—yielding 0.1% drift over 24 months, trouncing ultrasonic rivals by 35% in turbid waters, as in a Baltic ferry trial where it maintained calibration amid 20 NTU silt loads.
- Innovation Point 2: Biofouling-Resistant Electrode Design: Platinum-tipped electrodes with anti-adherent polymer coatings minimize marine growth, sustaining signal-to-noise ratios >60 dB for 5 years—outlasting bare-metal sensors by 200%, per Yokogawa longevity studies in tropical routes that cut cleaning intervals from quarterly to annual, slashing drydock OPEX.
- Innovation Point 3: Dual-Axis Vector Compensation: Integrated athwartship sensing corrects for leeway and yaw, boosting longitudinal accuracy to 0.05 knots in beam seas; this edges out single-axis legacy logs by 25% in cross-current tests, evident in North Sea LNG carriers where it refined VDR logs for forensic precision post-incident.
Application Cases and Industry Value
In a 2025 retrofit for a Singapore-flagged VLCC tanker, the Yokogawa EML-500-HV1 sensor upgraded the EML500 log amid IMO decarbonization mandates, hull-welded at drydock to interface with the LT501 master via RS-422 for real-time fuel analytics. The 36-hour install calibrated transverse offsets against GPS, honing speed pulses to optimize slow-steaming profiles that conserved 10% HFO—deck officers touted its “whisper-accurate whispers through swells,” preempting a 5% overconsumption spike and saving $450K yearly, while embedding voyage data for EEXI compliance and elevating fleet sustainability in bunker-hungry trades.
Off Norway’s fjords, Yokogawa EML-500-HV1 units fortified a ro-ro ferry’s navigation suite against katabatic gusts, dual-mounted for vector-resolved logs feeding ECDIS auto-pilot. Commissioned in 48 hours post-quayside haul, they ironed out 15% heading errors in 30-knot crosswinds, spiking on-time docks by 22% and garnering logs like “From foggy guesses to flow-forged facts—our passages pulse true.” This not only curbed crew fatigue but halved carbon audits by 18%, epitomizing the EML-500-HV1‘s tide-turning torque in eco-conscious coastal ops.
Related Product Combination Solutions
Chart comprehensive marine motion with the Yokogawa EML-500-HV1 synced to these Yokogawa navigational anchors:
- LT501: Master indicator unit; fuses with Yokogawa EML-500-HV1 for LCD speed displays in bridge consoles, enabling triple-log redundancy for SOLAS.
- EML500-HS1: Horizontal sensor counterpart; pairs athwartship with Yokogawa EML-500-HV1 for full dual-axis in ice-strengthened hulls, refining drift in polar routes.
- LS571: Signal conditioner module; amplifies Yokogawa EML-500-HV1 outputs for noisy environments, ideal in seismic survey vessels.
- EML500 Master Unit: Central processor; orchestrates Yokogawa EML-500-HV1 data to NMEA muxers for VDR integration in bulkers.
- GY-series Gyrocompass: Complements Yokogawa EML-500-HV1 with heading fusion for gyro-stabilized logs in dynamic positioning rigs.
- RD-500R: Doppler backup sensor; hybrids with Yokogawa EML-500-HV1 for bottom-tracking failover in shallow drafts.
- IC8000: Integrated control display; visualizes Yokogawa EML-500-HV1 vectors alongside AIS for collision-avoidant autopilots in ferries.
Installation, Maintenance, and Full-Cycle Support
Embarking on the Yokogawa EML-500-HV1 setup sails smoothly: Haul the vessel, fair the hull site with 200-grit abrasive, then torque the flange to spec through epoxy sealant—cable glands seal penetrations watertight, with master sync via RS-422 in 20 minutes post-dive test. Its corrosion armor laughs at barnacle bids, but sacrificial anodes in brackish bays extend electrode life; baseline zero-speed checks via dockside jig lock linearity in 15 minutes, no heavy lifts needed.
Endurance is etched in ease, with annual probe cleans via ultrasonic baths restoring 100% sensitivity in 10 minutes, and self-diagnostics flashing cable faults to the LT501—MTBF surges past 50,000 hours, enabling underwater swaps with diver tools that recalibrate live in 30 minutes via drop-in spares. This hull-hardy harmony halves service calls by 40%, outpacing finicky foes.
Yokogawa’s compass is constant: 24/7 telematics for anomaly alerts, OTA firmware for spectral tweaks, and a 5-year warranty with Yokohama vaults at 97% readiness. From hydrographic surveys to crew clinics, we navigate your Yokogawa EML-500-HV1 for horizonless horizons, with IACS-endorsed academies to captain your competence.
