New Brunswick Scientific / Eppendorf M1297-7004 pH/DO PCB assembly with 4-20mA interface, intended for compatible New Brunswick / Eppendorf bioreactor and fermentor control systems. This board is used in the pH and dissolved oxygen measurement/control path, making it a valuable replacement part for BioFlo, CelliGen, or related NBS bioprocess platforms where sensor signal handling or analog process I/O hardware needs repair. Useful for bioprocess labs, university facilities, OEM service groups, and equipment rebuilders maintaining legacy New Brunswick fermentor and cell-culture systems. Buyer should verify compatibility with their exact controller revision before purchase.
