What It Is the Magnetic 4-Probe Holder by Red Sea?

• The Magnetic 4-Probe Holder is a mounting accessory from Red Sea’s ReefSense / ReefControl system.

• Its purpose is to hold up to four digital probes (pH, temperature, conductivity/salinity, ORP, etc.) securely and in an organized way. 

Key Features of Magnetic 4-Probe Holder

1. Magnetic Mounting

   • Uses a strong magnet (rubber-coated) to attach to glass or metal surfaces like the wall of a sump or tank.

   • Tool-free installation: you can reposition it easily because of the magnetic attachment.

   • It’s compatible with glass up to about 12 mm (½”) thick.

2. Four Probe Slots

   • It has four dedicated cutouts / holes designed to grip standard ReefSense probes.

   • Helps keep probes at a stable, optimal depth so that they remain submerged but don’t sit in turbulent flow, microbubbles, or surface film that could distort readings.

   • The design helps tidy up cables: probe wires can be routed neatly, avoiding clutter in the sump.

3. Materials & Durability

   • Made from reef-safe, non-corrosive materials suitable for long-term use in saltwater / marine aquariums.

   • The magnet is rubber-coated, which protects the glass and provides a more secure grip.

4. Compatibility

   • Specifically built to work with ReefSense digital probes / ReefControl system.

   • Because of its general design (slots for 12 mm probes), it may also work with other probes of a similar diameter. 

Use Cases of Magnetic 4-Probe Holder

• Organizes Your Sensors: If you have multiple probes (pH, salinity, ORP, temperature), this holder keeps them together in a clean, orderly way.

• Stabilizes Readings: By keeping probes in a fixed, controlled position, it helps ensure more consistent and reliable measurements.

• Easy Maintenance: Since it’s magnetically mounted, you can easily remove or reposition it to clean the probes or the holder itself.

• Aesthetic & Practical: Reduces probe cable clutter, gives a more professional look to your sump / technical compartment, and helps maintain efficient cable management.

Things to Be Careful About when using Magnetic 4-Probe Holder

• Surface Prep: The glass or metal surface where you mount it should be very clean (free from salt creep, algae, or residue) for the magnet to hold securely.

• Glass Thickness: There’s a limit to how thick the glass can be for effective magnetic attachment 

• Probe Compatibility: While it’s designed for ReefSense probes, extremely large or non-standard probes might not fit perfectly.

• Salt Corrosion Over Time: Even though materials are reef-safe, long-term exposure to saltwater and salt creep could eventually require occasional cleaning / maintenance.

Summary

• The ReefSense Magnetic 4-Probe Holder  is a smart accessory for organizing and mounting up to four digital probes in a reef or marine technical setup.

• Uses a strong magnet for a clean, tool-free installation on glass or metal.

• Helps maintain stable probe placement, reducing measurement errors and improving data reliability.

• Made of reef-safe, durable materials, and is tightly integrated into the ReefSense / ReefControl ecosystem.