Sensonetics' SEN-420 Series Extrusion Pressure Transmitters utilize the same State-of-the-Art Silicon-on-Sapphire technology as used in the revolutionary SEN-400 Series Extrusion Pressure Transducers which have established a proven track record for accuracy, reliability and durability in the thermoplastics and food extrusion industries for over 30 years. The direct nozzle measurements eliminate the transfer tubes or push rods that other pressure transducers require.