Engine Indicator Type 30

Mechanical Engine Indicator Type 30 is replaced by DPI



The mechanical pressure indicator type 30 measures dynamic pressures. It is especially designed to analyze large two and four stroke Diesel engines.

The type 30 indicator has gone out of production 2016. It is replaced by DPI.

Leutert engine indicators are used on Diesel engines, gas engines, air compressors, pumps, etc. A metal stylus draws a clear pressure-path diagram which records the pressure curve within the engine cylinders as influenced by the piston stroke. The recording drum can be moved by means of a string, which is pulled manually or by the engine. If the drum is driven by the engine, the diagram may be planimetered. Our indicators are designed to cover various ranges of speed and rates of pressure-change.


  • Individually calibrated high accuracy heat treated springs
  • Rugged and proven design
  • Easy and simple operation by unskilled operator
  • Ready-to-use equipment
  • Cheapest way to analyze your engine



Pressure range: up to 250 bar, see spring table below
Standard connection: W 27 x 1/10"
Engine range: up to 1,000 rpm or max. dp/dt = 18 x 10³ bar/sec
Diagram: max. 30 mm/60 mm (height/length)
Drum diameter: 40 mm
Paper size: 145 mm x 45 mm
Dimensions: 120 mm x 105 mm x 85 mm



Scale Max. Pressure Spring No. Part-No.
0.20 mm/bar 150 bar 30/30 bar 4611.0.71.14000
0.16 mm/bar 200 bar 30/40 bar 4611.0.71.16000
0.12 mm/bar 250 bar 30/50 bar 4611.0.71.17000
Spring table for piston 1/5, piston diameter 9.06 mm