Peak Pressure Indicator MSI-3 or MSI-4

Measuring peak pressure is a simple, quick and cheap way to maintain engines.

When the combustion engine loses power, measuring compression (peak pressure) is often a first step in locate potential problems. When measuring the cylinders, the pressure on each compression stroke on the peak pressure indicator (gauge) increases until the maximum indicated by the engine manufacturer has been reached, or nearly reached.

If the measured pressure is significantly lower than indicated in the specification of the engine, this may indicate wear. When increasing the max. Cylinder pressure also increase the mechanical stresses.

Depending on how the peak pressure measurement value is, and the engine is set, then measures for repairing the engine can be initiated at short notice.

Peak Pressure Indicator MSI-3

The MSI-3 peak pressure indicator measures the maximum cylinder pressure of large two- and four-stroke engines. It features a shock absorber integrated into a stainless steel body, a union nut, a pressure gauge and a handle, all safely stored in an instrument case.

The peak pressure indicator is attached to the engine via an indicator valve with the union nut. The indicator valve is part of the engine. When the indicator valve is opened, the pressure in the combustion chamber is routed 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 Leutert peak pressure indicator MSI-3 is designed to withstand the high pressures and temperatures generated in modern internal combustion engines such as marine diesel and gas engines. Its robust design makes it insensitive to vibrations and requires very little maintenance. This engine indicator is characterized by simple operation and high instrumental precision in all speed ranges.

For smaller engines with limited installation space, we recommend the peak pressure gauge MSI-4.

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

Features of the peak pressure indicator MSI-3

CE marking
Measuring range up to 300 bar
High accuracy in all speed ranges
Simple and easy operation
Extremely robust, low maintenance
Insensitive to vibration
Steel pressure gauge in safety design

Peak-pressure-indicator MSI-4

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

Technical Specification

Brochure

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Max. peak pressures	20 MPa, 25, MPa, 160 bar, 250 bar, 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	1.8 kg without box, 2.6 kg with box
Standard connection	W 27 x 1/10”