In 2022 IMES started to develop its own spark plug with an increased service life of 4000 – 6000 hours. In contrast to a known hook spark plug, the design of annular gap shielded with a center electrode as a ring was chosen.

The IMES spark plug type ISP-01 with M18x1.5 screw-in thread has been successfully tested on various gas engines over the last 2 years.

For the integration of a pressure sensor into the spark plug, IMES has developed a miniaturized pressure measuring element that turns two products into one. The pressure spark plug is a future-oriented and innovative product for series use on purged pre-chambers.

By integrating the innovative pressure spark plug into the pre-chamber, the intensity of the ignition flares that go from the pre-chamber into the main combustion chamber can be precisely determined and, with the help of a "closed loop" control circuit, the purge quantity for the pre-chamber can be adjusted directly from working cycle to working cycle. The controlled variable is the pressure gradient in the prechamber, which provides direct information about the lambda in the prechamber.