The VISATRON VN115/87 is an Oil Mist Detector manufactured by Schaller Automation. It is a crucial safety device used for monitoring the crankcases of diesel engines to detect the presence of oil mist, which can create potentially explosive conditions.
Here’s a breakdown of its key characteristics:
- Product Type: Oil Mist Detector (OMD)
- Manufacturer: Schaller Automation (VISATRON® is a registered trademark of Schaller Automation)
- Series: VN115/87 belongs to the VN/87 series of VISATRON® oil mist detectors. This series was later superseded by the VN/87plus series, but many VN/87 units are still in operation.
- Application: Primarily used for the 4-stroke engine market.
- Detection Principle: Measures the opacity (turbidity) of the air drawn from the crankcase. An infrared light beam passes through the sample flow, and the level of oil mist is determined by the absorption of this light.
Alarm System: Typically equipped with multiple relay outputs for different alarm levels:
- System Ready
- Pre-Alarm (often set at a lower threshold)
- High Oil Mist Alarm (Main Alarm) – triggers engine shutdown or other safety measures.
- Installation: Requires a single tube installation for sampling air from the engine crankcase.
- Interchangeability: The measuring heads of the VN/87 series are designed to be interchangeable with the later VN/87plus series.
- Successor: The VN115/87 was replaced by the VN115/87plus in 2008, which includes enhancements like an integrated heater in the measuring head, integrated scavenging air, a pre-alarm interface, and a serial interface.
Alarm System: Typically equipped with multiple relay outputs for different alarm levels:
In summary, the VISATRON VN115/87 is a vital safety component for diesel engines, continuously monitoring for dangerous oil mist concentrations within the crankcase to prevent potential explosions and ensure the safety of personnel and equipment.
