Main Engine · Servo Oil · Hydraulic Oil
Nothing about your
main engine oil
goes unnoticed.
HYDRA+ monitors your ME electronic engine’s servo oil and MECC continuously — ISO 4406 particle count, density, viscosity, base number, water and fuel contamination. Inline. In real time. Without interruption.
The problem
Your main engine runs
on clean oil — or it doesn’t run.
ME electronic engines — ME-C and ME-B — rely on servo oil to actuate the fuel injection valves. FIVA and ELVA are hydraulically operated. When particle contamination exceeds ISO 4406 limits, these precision components begin to degrade. The wear is invisible. The consequences are not.
Conventional sampling visits your servo oil weeks apart. In between, your engine runs blind. A particle count exceedance can build, circulate, and score valve faces before the next sample arrives. By then, you are looking at FIVA spares — at best — or an engine slowdown that puts you off-hire.
What HYDRA+ monitors
Three dimensions of your oil.
Watched simultaneously.
HYDRA+ measures across three distinct oil health dimensions — inline, in real time, without removing a single sample.
Cleanliness
ISO 4406
Particle Count
Particles counted and classified at 4, 6, and 14 micron channels. Cleanliness level reported to ISO 4406 standard — the language your classification society speaks. When the number moves, you see it immediately.
Early warning against engine slowdown and off-hire
Degradation
Density, Viscosity
& Base Number
Oil degrades before it contaminates. Viscosity shifts, density changes, and base number depletion are the earliest indicators that something is changing inside your MECC. HYDRA+ tracks all three — continuously — so the trend is visible weeks before a lab result would show it.
Prevent asset damage and optimise oil change intervals
Contamination
Water & Fuel
Ingress Detection
Dissolved and free water measured continuously. Fuel dilution tracked in real time. Both contamination events degrade oil film strength and accelerate wear — and both develop silently between sampling intervals. HYDRA+ gives you the full picture, always.
Catch contamination before it reaches your FIVA valves
System architecture
From engine room
to your superintendent’s inbox.
Two components. One cable. Complete visibility — onboard and on shore.
Engine room
HYDRA+ Sensor Pack
Installed on the ME electronic engine — downstream or upstream of the super fine filter (6/10 micron). Measures continuously. Sends data to the junction box.
Engine room
Junction Box
Houses power supply and communication hardware. Installed away from the engine — away from heat and vibration. Onboard data visualisation displayed here.
Engine control room
SENSYN PC / Onboard PC
ASTER runs on the SENSYN-provided PC in the ECR. Full dashboards, trend charts, alarm history, and automated reports — visible onboard at all times, with or without internet.
Shore
WAN to ASTER Cloud
When internet is available, data transmits to ASTER Cloud. Your shore team — and the SENSYN SENTINEL team — see live vessel data, receive alerts, and produce intelligence reports.
Installation
One decision.
Downstream or upstream.
HYDRA+ installs on the super fine filter (6/10 micron filter) of the ME hydraulic system — either downstream or upstream, depending on what you need to see.
Downstream of SFF
Measures the oil quality reaching your FIVA and ELVA valves — post-filtration. This is the true cleanliness of the oil entering the most precision-critical components on the engine. Any exceedance here is an immediate action item.
Typical ISO reading (6 µm channel): 16 — target cleanliness confirmed by filter
Upstream of SFF
Measures the system load — the particle burden the super fine filter is handling. Trending this upstream count reveals filter saturation, contamination ingress events, and tells you when your SFF element needs replacement before it bypasses.
Typical ISO reading (6 µm channel): 19–21 — showing what the filter is catching
Most operators install downstream for valve protection monitoring. The upstream position is added when comprehensive filter health tracking is required. SENSYN will advise the optimal configuration for your engine type.
What happens next
Data is only useful
when it tells you what to do.
HYDRA+ feeds every reading into ASTER. When a parameter moves outside its threshold, the SENSYN shore team doesn’t forward an alarm — they diagnose it. Every alert comes with a specific, actionable recommendation for your technical superintendent.
If ISO count rises
SFF filter element check
Inspect and replace super fine filter spares. Check filter differential pressure. Review purifier mode of operation. Act before valve wear begins.
If viscosity or BN shifts
Purifier mode adjustment
Adjust purifier maintenance schedule and operating mode. Optimise oil condition before degradation reaches the point of component impact. No guesswork — data-driven timing.
If exceedance persists
FIVA / ELVA spares review
Plan and procure FIVA or ELVA spares at scheduled port call — not on emergency pricing after a slowdown. This is the difference between a maintenance event and an off-hire event.
Technical specifications
The details,
for those who need them.
What it monitors
| ISO 4406 Particle Count | 4 µm, 6 µm, 14 µm channels — continuous |
| Density | Continuous inline measurement |
| Viscosity | Continuous inline measurement |
| Base Number (BN) | Trend monitored inline |
| Water (dissolved) | Continuous detection |
| Water (free) | Continuous detection |
| Fuel contamination | Continuous detection |
System components
| Sensor Pack | Engine room — on ME hydraulic / SFF line |
| Junction Box | Engine room — away from engine, houses power & comms |
| SENSYN PC | Engine control room — runs ASTER on-premise |
| Connectivity | WAN / satellite for cloud data transmission to shore |
| Compatible engines | ME-C, ME-B (Wärtsilä / MAN ME electronic engines) |
| Installation | Crew-installed · No drydock · 4–6 hours |
| Software | ASTER — on-premise and cloud |
Choose how you deploy
Three ways to own
the intelligence.
Whether you want to own the hardware, spread the cost, or simply subscribe — HYDRA+ fits your budget model.
Option 1
Direct Purchase
$8,500
One-time · + $1,500/year recalibration
- Hardware owned by ship / operator
- Full ASTER on-premise software included
- Annual recalibration service
- Optional cloud upgrade at any time
Most popular
Connected Service
$3,000 + $250/mo
Reduced upfront · Recalibration included
- System owned by SENSYN
- Connected to SENSYN shore team
- Analytics, reporting & alerts as a service
- Recalibration included — no additional cost
- Upgrade to SENTINEL at any time
Option 3
Full Subscription
$0 + $340/mo
Zero upfront · Everything included
- No capital expenditure
- System owned and maintained by SENSYN
- Full connected service from day one
- Cancel with notice — no long-term lock-in
All prices in USD. Pricing confirmed on enquiry — vessel type and configuration may affect final quote.
Your main engine
has never had this
level of attention before.
Tell us your vessel type and engine model. We’ll confirm the right installation configuration and the pricing option that fits your operation.
