The new, compact and ease-to-operate AquapHOx platform is a flexible solution for many applications. Besides stand-alone loggers with internal data storage for long term deployment, we also developed transmitters for fast sampling and easy integration into consisting set-ups utilizing the integrated analog outputs. The logger and transmitter are available with a titanium housing for deep-sea applications up to 4000m. These devices are highly flexible concerning choice of analyte and sensor format as O2, pH and optical temperature sensors can be connected.