Getting Started with the STs Series Thank you for purchasing a pHionics STs Series instrument. We look forward to providing you with many years of reliable service! All the resources you need to start measuring water quality quickly are collected on this page. Watch Video STs Series Initial Setup Watch Video STs Series Setup with the HOBO RX3000 STs Series Quick Start Guides Download relevant guides to get your new sensors working quickly and easily. STs Series pH Quick Start Guide STs Series Conductivity Quick Start Guide STs Series Dissolved Oxygen Quick Start Guide STs Series ORP (redox) Quick Start Guide General Resources The Full STs Series Manual Procedures When to Calibrate or Replace an Electrode How to Remove and Replace Electrodes pH and Dissolved Oxygen Electrode Care Conductivity and ORP (redox) Electrode Care STs Series Pipe Mounting Instructions Other Eliminating Electromagnetic Interference The Guide to pH Drift Calculating Voltage Drop for Water Quality Systems Managing Water Quality in Aquaculture Can’t find what you’re looking for? Contact Us!