The Starter 400 Series Portable Water Analysis Meters from OHAUS Corporation have released:
ST400: designed for pH analysis
ST400M: a multi-parameter meter for pH and conductivity testing
These lightweight meters are engineered with waterproof housing and a rubber protective case. The ST400 series comes with a rechargeable lithium battery for up to 40 hours of use. The intuitive software, and large 1000 record data storage capacity with a built-in micro-USB port, ensure proper data transfer.