Quick view Pyxis ST-774 | Ultra-Low Inline Luminescent Dissolved Oxygen Sensor & Flow Cell MSRP: $3,055.00 Description: The Pyxis Lab® ST-774 is an ultra-low range dissolved oxygen (DO) sensor with a lower limit of detection 0.4 ppb (µg/L). Our design is based on the principle of fluorescence quenching to determine the partial pressure of... MSRP: $3,055.00 Add to Cart The item has been added Add to Wish list Compare