Peak Pressure Gauge

Peak Pressure Gauge



The MSI-4 peak pressure gauge is used to measure the ignition pressure of large combustion engines. It is attached to the engine via an indicator valve using a union nut. In contradiction to the peak pressure indicator MSI-3 the peak pressure gauge MSI-4 was designed for smaller 4-stroke engines with limited space for installation of an indicator such as auxiliary marine diesel and locomotive engines.
The MSI-4 peak pressure gauge features a shock absorber integrated in a stainless steel body, a union nut, a pressure gauge, and a handle, all securely stored in an instrumentation box. The indicator valve is part of the engine. When the indicator valve is opened the pressure inside the combustion chamber is lead to the pressure gauge via the shock absorber. The shock absorber reduces vibration and slows down the pressure drop once the pressure in the combustion chamber decreases, therefore the maximum pressure can easily be read on the pressure gauge. Each cylinder of the engine is measured individually.
The MSI-4 peak pressure gauge is designed to resist the high pressures and temperatures generated in modern combustion engines. Its sturdy design makes it immune to vibrations and requires extremely low maintenance. This engine indicator, sometimes called peak pressure gauge, is hallmarked by simple operation and a high degree of instrumental precision in all engine speed ranges.

Leutert Peak Pressure Gauges carry the CE mark. It signifies that the Peak Pressure Gauge has been assessed to meet high safety, health, and environmental protection requirements.

Features of the peak pressure gauge MSI-4

  • CE marking
  • Measuring range up to 300 bar
  • High accuracy in all speed ranges
  • Slim line dimensions
  • Extremely robust, low maintenance
  • Insensitive to vibration
  • Steel-manometer in safety construction



Max. peak pressures 25 MPa, 300 bar (others upon request)
Engine range up to 2,500 rpm
Permissible temperature ambient -20 to 60°C
Error margin ± 1.6 %
Dimensions c/w box 38 x 29 x 10 cm
Weight 1.6 kg without box, 2.4 kg with box
Standard connection W 27 x 1/10”