17 Piece Diesel Engine Compression Tester Kit - Brittle & Co The compression tester allows you to easily measure the compression pressure of your diesel vehicle. The manometer has a measuring range of 0 - 70 Bar / 0 - 1000 Psi. In addition to the compression meter, you can get 9 different glow plug thread adapters and 4 adapters for nozzle threads. The compression pressure gauge also features a built-in resetter and all adapters have a shortcut. GBP 53.65 1