Somanetics 5100C-PB Preamplifier

5100C-PB Preamplifier is the Preamplifier B with cable for the INVOS 5100C cerebral/somatic oximeter system, providing channel 3 and 4 inputs to extend multi‑channel near‑infrared monitoring. It is a Covidien/Somanetics accessory designed to be used with the INVOS 5100C and is typically paired with SomaSensor cables (RSC‑3/RSC‑4) to connect multiple sensors to the main monitor. The INVOS 5100C system delivers real‑time regional oxygen saturation (rSO₂) measurements for cerebral and somatic tissue, and the PB model serves as the amplified interface for channels 3 and 4, with a preamp locking mechanism that secures cables once inserted. This compact module is listed as part of the 5100C family (alongside 5100C‑PA) and is available from Covidien as an OEM Somanetics component; typical product references describe it as Preamplifier B with cable for channel 3 and 4 and note reordering through the manufacturer. In practice, the unit is documented to weigh approximately 2 lb and is used within hospital settings such as operating rooms and intensive care units to support multi‑channel cerebral/somatic oximetry in conjunction with the INVOS system.