Neptune Systems Double Junction pH Probe

The Double Junction pH Probe by Neptune Systems delivers superior longevity and reliability compared to standard single-junction probes. With a dual-chamber design, this lab-grade probe offers enhanced protection from contaminants, reducing the risk of clogging and extending calibration intervals—making it ideal for serious reef keepers and professionals alike.

Key Features

• Double junction design minimises contamination

• Stable, reliable pH readings over time

• Reduced calibration frequency

• Compatible with all BNC-style ports

• 3-metre (10-foot) cable for flexible mounting

• Built to laboratory-grade specifications

Why Use a Double Junction Probe?

Traditional probes often contain a single chamber that houses both the reference gel and internal probe, which can be prone to contamination from proteins, organic material, or tank additives—leading to inaccurate readings and reduced lifespan.

Neptune’s double junction probe adds a secondary chamber that acts as a protective buffer, shielding the reference solution and electrode from contaminants. This design results in longer service life, less frequent calibrations, and increased data stability in both saltwater and freshwater environments.

Specifications

• Probe Type: Double junction pH probe

• Connector Type: BNC

• Cable Length: 3 m (10 ft)

• Application: Suitable for all Neptune Apex systems or any BNC-compatible controller

• Calibration recommended every 60–90 days

• Calibration solutions sold separately

What’s Included

• 1x Double Junction Lab-Grade pH Probe with 3 m (10 ft) cable

  Note: Calibration fluid not included.