LEHMANN & MICHELS has specialized in the production of measuring instruments since 1911. LEMAG mechanical cylinder pressure indicators are known worldwide. There are three different types of mechanical indicators available for slow (LEMAG Typ 50-M3), medium (LEMAG Typ 30-M2) and highspeed engines (LEMAG Typ 25-M). The first electronic indicator for pressure measuring was introduced in 1985. PREMET electronic indicators are known for their accuracy and reliability.