APZ 4420 is a pressure transmitter with a WEKO® 2» (Hammer Union) connection. The monolithic process connection prevents the transmitter from changing its characteristics when mounted in harsh environments. Thin-film piezoresistive sensor ensures low drift and the best long-term stability. The pressure transmitter is particularly resistant to strong vibrations, shocks and pressure surges. It is reliable in cementing and wellbore tightening applications.