OIL MIST DETECTOR VISATRON SCHALLER VN215/ 87

Oil mist detectors of the VISATRON series protect large diesel engines of all operation classes against serious damages originating from crankdrive bearing or piston component overheating.
Operating voltage: 24 V DC +/- 25%, with reverse battery protection
Power consumption: Maximum 3 A
Driving air for air jet pump: 0.3 to 0.5 bar
Protection: IP 44
Admissible operating temperature range: 0°C to +70° C

Oil Mist Detector System – VISATRON VN215/87

This is an advanced oil mist detector system, specifically the VISATRON VN215/87 manufactured by Schaller Automation. It is a modern marine engine safety device designed to continuously monitor oil mist levels inside crankcases, helping prevent explosions, engine failures, and costly downtime.

What it is

The VISATRON VN215/87 is a high-performance crankcase monitoring system used on large marine diesel engines and industrial power units. It belongs to a newer generation of oil mist detection systems, offering enhanced reliability, improved sensitivity, and advanced automation compared to earlier models.

Its primary role is to detect abnormal oil vapor concentrations at an early stage, allowing operators to take corrective action before a hazardous situation develops.

What makes this one special

Compared to earlier VISATRON models such as the VN115, this version typically includes several upgrades:

✔️ Improved electronics and performance
• Enhanced signal processing for higher accuracy
• Better sensitivity to small changes in oil mist concentration
• Increased system reliability in harsh environments

✔️ Multi-point monitoring system
• Simultaneously monitors multiple crankcase locations
• Eliminates the need for manual channel selection
• Provides faster detection of localized faults

✔️ Integrated sampling unit
• Built-in pump and air distribution system (visible in the lower section)
• Automatically cycles through sampling points
• Ensures consistent and continuous monitoring across all channels

How it works

1. Air samples are continuously drawn from different sections of the engine crankcase
2. The system uses optical detection (light scattering technology) to measure oil mist concentration
3. Values are compared in real time across all monitored points
4. An alarm is triggered if:
   o Oil mist concentration exceeds safe thresholds
   o A rapid increase is detected (critical for early fault detection)

This dual-condition monitoring significantly improves early warning capability.

What you see in the image

• Top unit → control and measurement electronics
  • Middle section → sampling distribution manifold
  • Bottom section → pump and air handling system
  • Multiple pipe connections → linked to crankcase sampling points

Where it’s used

• Large marine diesel engines (main and auxiliary)
  • Commercial vessels, tankers, and offshore platforms
  • Power generation systems and industrial engines

Key advantages

• Fully automatic operation with no manual intervention
  • High accuracy and fast response time
  • Advanced diagnostics and fault detection
  • Reduced risk of crankcase explosions and engine damage

Simple explanation

In simple terms, this is a fully automatic, multi-point engine safety system that constantly checks for dangerous oil vapor inside the engine. It detects problems early and reacts instantly, making it one of the most advanced and reliable oil mist detection solutions used in modern marine engines.