Kistler's Type 5155A multichannel temperature and pressure charge amplifier converts the charge signal from all piezoelectric sensors and Type K thermocouples into a proportional voltage output signal for the monitor, control, and optimization of injection-molding processes. Offered in two measurement ranges with choice of single-, two-, or four-channel operation, the unit's measurement range inputs may be switched individually for each channel by remote control. Amplifiers equipped with temperature inputs are provided in a rugged case with IP65-rated sealing. A differential input circuit ensures that common-mode signals of ±4 V have no disturbing influence. For thermoplastic injection molding, Type 5155A offers a SmartAmp self-optimizing switch-over detection option that is integrated into machinery control systems that detects volumetric filling of the mold to reduce setup time.