IMES products are characterized by their ideal combination of precision, reliability, robustness, long effective life and outstanding cost-effectiveness. IMES serves five main segments in the market for industrial, marine and automotive engines:

  • Continuous online cylinder pressure measurement for advanced engine monitoring and diagnosis, and as an input for closed-loop control systems on gas, dual-fuel and diesel engines
  • Periodic cylinder pressure monitoring by engine operators on propulsion engines, generator sets and compressor sets in ships, power plants and compressor stations
  • On-site cylinder pressure measurement for research, development, trouble- shooting and periodic cylinder balancing on large engines
  • Electronic compression and cylinder leakage testing in maintenance, overhaul and repair workshops on series-produced engines for cars, commercial vehicles, mobile and stationary equipment, workboats and pleasure craft
  • Continuous electronic pressure measurement on reciprocating compressors in engine powered compressor sets.



As one of the most basic values in combustion engine technology, cylinder pressure gives unique insights into both engine performance and engine condition.
Equipping each cylinder of a diesel, gas or dual-fuel engine with an IMES cylinder pressure sensor provides a vital input to electronic control, monitoring and diagnose systems and a fund of information for human analysis.
IMES combustion pressure sensors are characterized by their long-term accuracy with minimal signal drift over long periods, combined with their outstanding cost-effectiveness.
Designed for a minimum of 16,000 operating hours, they enable the acquisition of highly accurate, processable data, either during periodic


Electronic Pressure Indicator EPM-XP

Data Sheet EPM-XP Plus

Data Sheet EPM-XP Plus Vibro

The battery powered, hand-held EPM-XP Electronic Indicator EPM-XP is designed for periodic monitoring of cylinder pressures on large diesel, gas and dual-fuel engines. It provides important measurement data for engine diagnostics and condition monitoring directly at the point of use.

EPM-XP gives immediate read-outs for peak pressure (Pmax) and (Pcomp) from a number of pressure cycles per cylinder.

The acquired data can then be downloaded to a computer where the IMES visualization and evaluation software is used to calculate IMEP and IPOWER including p/v diagrams.

The EPM-XP electronic cylinder pressure indicator is designed for use on 2-stroke engines in the speed range 40 – 300 rpm and 4-stroke engines in the speed range 200 to 1500 rpm.



CCM is a smart combustion signal-processing device for marine and stationary gas engines.

The CCM function is to acquire and process in real time data from cylinder pressure sensors on dual-fuel and spark ignited gas engines. Every combustion cycle will be evaluated on every cylinder for to calculate key parameters engine builders needs to implement cylinder pressure based control on engines.

CCM is designed as a plug-and play module for IMES CCM Systems.

Knock detection: The knock control concept identifies combustion knock in cylinders to protect the engine against damage.

Peak pressure: The control system monitors engine operation and initiates a quick reduction in output or an engine cut-off if necessary, because malfunctions of the engine controller can cause cylinder or engine failure.

IMEP: IMEP calculations enable to optimize the combustion process by cylinder output balancing. This can reduce fuel consumption up to 2%.

Robust housing: The CCM box is very robust and it is proven for many years as it is still in use for several other engine control systems (e.g. electronically controlled injection systems).

Misfire detection: Every combustion process with weak- or misfire will be detected to realize early defect spark plugs or injectors.

Thermodynamic parameters: CCM processes and calculates heat release rate in real time in each cylinder, which is an important information for the control system for optimizing engine efficiency.

Plug- and play concept: CCM can be installed directly at the engine or inside a cabinet. A sophisticated plug- and play concept enables an easy fitting of cylinder pressure sensors and pulse inputs at CCM-housing.

System integration: CMM communicates via CAN bus with the engine control system and it can be integrated to the engine management system.



The new IMES TPE Performance Evaluation Software designed for  2- and 4-stroke diesel engines loads cylinder pressure data from EPM-XP directly and gives a quick and very reliable view on many operational aspects.

Furthermore it recommends actions to take for optimizing engine condition.
Due to easy handling and ISO correction it is a timesaving and reliable system that enables extensive savings by reducing fuel and lube oil consumption as well as engine repairs caused by inadequately adjusted engines.



Electronic Compression Tester and Leakage Meter for Petrol, Diesel and Gas Engines in:

  • Cars
  • Commercial vehicles
  • Locomotives
  • Mobile and stationary equipment
  • Workboats and pleasure craft

With the new Compri hand-held electronic compression meter, IMES is transferring its know-how and experience to compression and combustion chamber leakage testing on series-produced engines in maintenance, overhaul and repair workshops and the engine reconditioning business.

  • Single device for compression and leakage pressure measurement on both diesel and petrol engines
  • One man operation for all functions
  • Immediate read-outs of maximum compression
  • Data download to computer via integral USB port
  • Software package for detailed data visualization and evaluation
  • Adaptors for wide range of sparkplug, glowplug and fuel injector bores
  • 24 measurements per engine - e.g. compression and leakage on a V12
  • Also suitable for testing and measuring pressure in a range of on-engine / on-vehicle media e.g. lubricating oil, coolant, power steering fluid, compressed air in tires and braking systems.