The PM1 probe module is just what you need if you want to monitor pH or ORP in your tank. And, there is an added bonus, you get an extra temperature port as well as six I/O switch inputs for use on ATO, feed buttons, or whatever else you may come up with.
This module is perfect for someone that wants to add an additional pH or ORP port to their Apex System.
Features of the pH/ORP Module include:
Monitor/Control pH or ORP, and temperature.
6 digital inputs for float switches, water on floor sensors, pressure sensors, etc.
Full datalogging support in Apex Base module.
Up to 240 AquaBus modules can be added to the Apex system.
Plug and Play. Automatically recognized when installed into the system.
Two AquaBus connectors for flexible expansion via AquaBus
Led Status Indicator
Compatible with all Apex systems.
Galvanic Isolation for accurate and reliable probe readings.