Dissolved Oxygen Probe

Dissolved Oxygen Probe The Neptune Systems Dissolved Oxygen Probe is a lab grade sensor designed for precise and reliable oxygen monitoring when paired with the PM3 module. While the PM3 module is very affordable, the DO probe represents the primary investment due to its professional grade construction and accuracy. Unlike disposable probes that must be replaced entirely once performance declines, this probe is built for long term use. It features a replaceable membrane design, allowing you to maintain peak performance without purchasing a new probe. Simply replace the membrane approximately every three months to ensure accurate readings. Replacement membranes cost around $8, making routine maintenance simple and cost effective. Servicing Guide