Complete range of Visatron infrared oil mist detectors for 2-stroke, 4-stroke, crosshead and high-pressure engines. Genuine, refurbished and surplus stock available.
VN 115/87 Plus
Visatron VN115/87 Plus Oil Mist Detection System
Used on both 2- and 4-stroke engines. Acts as a detection switch — when oil mist development or dangerous friction is detected, an alarm is released to the ship's alarm and safety system, triggering engine stop or slowdown.
A header-suction-tube system is used by the VN115/87 Plus. The oil mist detector is positioned in the middle between two header-suction-tube sections on the engine sides. These tubes have a throttling effect and are thinner than the header-suction-tube, creating a pressure differential that drives the crankcase atmosphere through the measurement path.
The atmospheric mixture from all individual compartments passes via the header pipe through the detector's pipe connector box into the opacity measurement path in the housing of the measuring head. Upon detection of oil mist above the alarm threshold, the system releases an alarm signal to the ship's safety system — triggering an immediate engine stop or slowdown mode as per classification rules.
Feature
Specification
Engine Type
2-stroke and 4-stroke
Detection System
Header-suction-tube, infrared turbidity
Alarm Action
Engine stop or slowdown (classification dependent)
Sampling Method
Natural ventilation, header pipe
Alarm Threshold
4-stage adjustable (1.5%–5.0% opacity)
Origin
Schaller Automation, Germany
Original Schaller Spare Parts — VN115/87 Plus
11651 Measuring Head
10042 Fresh Air Filter
10798 Inspection Cover
10166 Gasket for Inspection Cover
10083 U-Tube Plug 1/4"
10082 U-Tube Plug Gasket
10041 Circlip for Scavenging Air Filter
10209 Screw Plug Seal R1/2"
10208 Screw R1/2"
11652 Connection Casing VN115/87 Plus
10022 Gasket for Measuring Head
10018 Upper Elastic Mounting System
10023 Flexible Bellow
10019 Lower Elastic Mounting System
10049 Valve Box Seal
11004 Connection Socket
11076 Base Plate
Genuine Stock — Schaller Visatron VN 115/87 Plus
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VN 115/87 EMC & VN 215/87 EMC — Refurbished Units Available: These models are now obsolete. We supply refurbished certified measuring head units with 1-year warranty.
Surplus Stock @ Singapore
VN 115/87 Plus EX
Visatron VN115/87 Plus EX Oil Mist Detector
Designed to monitor 4-stroke diesel, gas and dual fuel engines. ATEX certified for use in potentially explosive atmospheres. Same functional principle as the VN115/87 Plus with enhanced explosion-proof rating.
The VN115/87 Plus EX consists of a detection system that acts as a switch. When oil mist development or dangerous friction is detected, an alarm signal is sent to the ship's alarm and safety system. The engine will either stop immediately or switch to slowdown mode depending on classification rules and engine purpose.
The EX version features an explosion-proof enclosure, making it suitable for engines in classified hazardous zones aboard gas carriers and dual fuel vessels.
Feature
Specification
Engine Type
4-stroke diesel, gas & dual fuel
ATEX Rating
Explosion-proof (EX zone rated)
Application
Gas carriers, dual fuel vessels, hazardous areas
Origin
Schaller Automation, Germany
VN 115/93
Visatron VN115/93 Oil Mist Detection System
Suitable for monitoring trunk piston diesel engines with in-line and V cylinder arrangements running at medium and high speed. Header pipe sampling without individual compartment localization.
The atmospheric mixture from the crankcase passes from all individual compartments via header pipe through the detector's pipe connector box into the opacity measurement path in the measuring head housing.
The alarm threshold can be set to 4 levels in a range from 1.5% to 5.0% opacity — providing flexible sensitivity adjustment for different engine types and cargo conditions.
Feature
Specification
Engine Type
Trunk piston diesel — in-line and V arrangement
Engine Speed
Medium and high speed
Alarm Threshold
4-stage adjustable: 1.5%–5.0% opacity
Damage Localization
No (header pipe average monitoring)
Origin
Schaller Automation, Germany
VN 116/87 Plus
Visatron VN116/87 Plus Oil Mist Detection System
Higher sensitivity than the VN115/87 due to differential alarm level. Compares oil mist concentration from each side of the header-suction-tube section and responds when a difference is detected.
The VN116/87 Plus carries a differential alarm level in addition to the standard 4-stage adjustment. To measure opacity differential, the sample flow from both header-suction-tube sections is fed to the turbidimetric channel alternately by closing respective tube sections via reed valves.
The microprocessor saves opacity values and executes opacity comparison. In base configuration, both valves are open to monitor all compartments simultaneously. When overheating damage occurs, it is identified in the compartment group with the higher opacity.
Feature
Specification
Sensitivity
Higher than VN115/87 (differential alarm)
Detection Method
Differential opacity comparison via reed valves
Damage Localization
Compartment half with higher opacity
Alarm Type
Absolute + differential alarm levels
Origin
Schaller Automation, Germany
Spare Parts — VN116/87 Plus
11851 Measuring Head
10042 Fresh Air / Scavenging Air Filter
10798 Inspection Cover
10166 Gasket for Inspection Cover
10083 U-Tube Plug 1/4"
10082 U-Tube Plug Gasket
10312 Pipe Connection Adapter
10313 Gasket for Pipe Connection
11752 Valve Box VN116/87 Plus
10022 Gasket for Measuring Head
10023 Flexible Bellow
10307 Oil Mist Seal
10306 Oil Reflux Seal
10305 Seal for Valve Box
11004 Connection Socket
11076 Base Plate
VN 116/93
Visatron VN116/93 Oil Mist Detection System
Higher sensitivity design for trunk piston diesel engines — in-line and V-cylinder arrangements at medium and high speed. Direct replacement for VN115/93 without modifications.
The VN116/93 detects damage through a header pipe sampling system with display of the crankcase compartment half in which overheating damage has taken place — providing more precise fault localization compared to the VN115/93.
Since the sampling system via header pipe is identical to the VN115/93, the VN116/93 can directly replace the VN115/93 without any further modifications to the engine installation.
Feature
Specification
Engine Type
Trunk piston diesel — in-line and V arrangement
Speed
Medium and high speed
Damage Localization
Display of affected compartment half
Backward Compatible
Direct drop-in for VN115/93
Origin
Schaller Automation, Germany
VN 215/87 Plus
Visatron VN215/87 Plus Oil Mist Detection System
Indicates the suction point with the highest opacity, identifying the exact compartment where overheating damage has occurred. Single-suction-tube system with individual compartment connection.
The VN215/87 Plus has a single-suction-tube system where each compartment is connected by a separate tube to the valve box designed for 10 suction lines. The compound opacity from all compartments is continuously measured.
When opacity exceeds the damage check threshold, a search run is automatically executed. If the differential alarm level is exceeded, an automatic machine stop or speed reduction is immediately triggered — even if the search run is not yet terminated.
Feature
Specification
Suction System
Single-suction-tube per compartment
Valve Box Capacity
10 suction lines
Damage Localization
Exact compartment identification
Auto Response
Stop or speed reduction on alarm
Origin
Schaller Automation, Germany
Spare Parts — VN215/87 Plus
11751 Measuring Head
10042 Fresh Air / Scavenging Air Filter
10798 Inspection Cover
10166 Gasket for Inspection Cover
10430 Pipe Connection — Right
10411 Rubber Sleeve for Pipe Connection
10412 Lock Plug for Valve Box
10409 Clamp Plate for Tube Connection
11852 Valve Box for VN215/87 Plus
10022 Gasket for Measuring Head
10023 Flexible Bellow
10407 Oil Mist Gasket
10406 Oil Reflux Seal
10405 Gasket for Valve Box
10408 Tube Connection — Left
11004 Connection Socket
11076 Base Plate
VN 215/93 — Highest Sensitivity
Visatron VN215/93 Oil Mist Detection System
The highest sensitivity Visatron model. Best suited for crosshead engines at medium and slow speeds — where oil mist spreads slower from the damaged compartment compared to trunk piston engines.
The VN215/93 uses an individual compartment suction pipe system with a display showing the specific compartment with overheating damage. This is particularly important for crosshead (slow-speed) engines where oil mist diffusion is slower and higher sensitivity is needed for reliable protection.
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Refurbished VN215/93 in Stock: We maintain a stock of refurbished Visatron VN215/93 units — all tested and certified with 1-year warranty. Contact us for pricing and availability.
Refurbished Stock Photos
Feature
Specification
Sensitivity Level
Highest in the Visatron series
Engine Type
Crosshead engines
Engine Speed
Medium and slow speed
Detection Method
Individual compartment suction pipe
Damage Display
Specific compartment identification
VN 301 Plus EX — Pipework Free
Visatron VN301 Plus EX Oil Mist Detector
Designed to protect large diesel engines against oil mist explosions. Pipework-free installation — easy to fit with no complex header pipe system required. Adaptive to normal operation clouding.
The VN301 Plus EX is a next-generation oil mist detector that directly detects oil mist in individual engine compartments using sensor units mounted directly on the engine — eliminating the need for header pipe sampling systems.
The system responds adaptively to machine clouding in normal operation, reducing false alarms. Designed for minimal maintenance and low lifetime costs.
System components:
1 to 20 Visatron VN301 Plus Sensor Units (one per compartment)
1 to 2 Visatron VN301 Plus Central Units
Ready-made hybrid cables (power + data in one cable)
Monitoring device Remote Indicator II
Feature
Specification
Engine Type
Large diesel engines
Installation
Pipework-free, direct sensor mounting
Max Sensor Units
Up to 20 sensor units
Max Central Units
Up to 2 central units
Localization
Individual compartment — exact location
ATEX
EX rated — explosion-proof
Adaptive
Adapts to normal operation clouding
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