Neptune Oxyguard Probe with Cable Neptune Oxyguard Probe with Cable is a high-grade dissolved oxygen probe for compatible Neptune Apex aquarium controller systems using the PM3 dissolved oxygen module. Dissolved Oxygen Monitoring for Advanced Aquariums Dissolved oxygen monitoring is useful on heavily stocked aquariums, fish rooms, quarantine systems, ozone or aeration setups, and advanced reef systems where oxygen availability can affect livestock health and overall stability. When connected to the proper Neptune module, this probe allows dissolved oxygen trends to be monitored through the Apex ecosystem. Neptune Oxyguard Probe Features High-grade dissolved oxygen probe for compatible Neptune Apex systems Designed for use with the Neptune PM3 dissolved oxygen module Measures dissolved oxygen from 0 to 19.9 ppm Lab-quality probe with 10 ft cable Supports temperature, altitude, and salinity compensation when configured with compatible hardware MiniDIN 6 connector Useful for monitoring oxygen trends in advanced aquarium systems Replaceable membrane design supports ongoing service instead of replacing the entire probe when the membrane wears Oxyguard Probe Specifications Product type: Dissolved oxygen probe Measurement range: 0 to 19.9 ppm Probe grade: Lab quality Cable length: 10 ft Connector: MiniDIN 6 Compensation support: Temperature, altitude, and salinity compensation Required module: Neptune PM3 dissolved oxygen module Maintenance: Membrane replacement and recalibration required periodically Maintenance and Compatibility Notes This probe requires a compatible Neptune PM3 module and proper calibration. The membrane should be replaced about every 3 months, and the probe should be calibrated when the membrane is replaced. The appropriate adapter and calibration kit are required for that service procedure. Setup Directions Connect the probe to the compatible dissolved oxygen module, complete the required calibration procedure, and place the probe in a representative area with steady water movement. Keep the probe maintained according to the service interval and review readings over time before using dissolved oxygen data for alerts or aquarium decisions. What's Included One Neptune Oxyguard Probe with Cable