This EH series is interchangeable with the PARKER EMA3 SERIES. Steel Product. EMA couplings serve as diagnostic test points for Parker SensoControl® equipment and mechanical gauges. Designed for permanent installation at key monitoring locations, they feature a pressure cap to prevent damage and contamination. Their proven twist-to-connect design allows for safe connection under pressure. Compact and compatible with high-pressure hoses, EMA test points offer flexible installation in fluid systems.