The Rosemount Hx438 dissolved oxygen sensor provides a drift-free signal and maintains its calibration value for up to 50 steam sterilization cycles, making it ideal for biotechnology, pharmaceutical, chemical, and food processing industries where frequent sterilization is required.

The sensor uses a 4-pin connection plug for quick disconnection from the cable, facilitating easy replacement and maintenance. It can be used with insertion or retractable mounting assemblies typically used with large-scale batch processes that perform SIP cleaning. For smaller batch processes, it can be threaded directly into the top plate and autoclaved if necessary.

With a temperature range of -10 to 140°C and maximum pressure of 59 psig, the Hx438 is designed for demanding process conditions. Wetted materials include stainless steel and EPDM. The PG 13.5 process connection and 120mm sensor length provide flexibility for various installation configurations. Temperature compensation is provided by a 22K NTC thermistor.