ERH-AQ1 Probe / Combined Electrode

This combination pH electrode suits aquarists who need to check water chemistry with a meter fitted with a BNC-50 socket. It can be used for periodic or continuous readings in freshwater or marine aquarium water, and it also works in laboratory or field conditions.

Why it matters

• Two ceramic electrolytic junctions set into the glass wall give the reference half-cell good contact with the sample.
• The exposed membrane and junctions can be reached directly, which makes cleaning straightforward.
• The reference solution can be replaced, and its added thickening agent reduces electrolyte leakage. Replacing it extends the working life of the electrode.
• The cable is extended to about 2 m and has a shielded layer with an added semiconductive layer to reduce interference from electrostatic charges, which helps with mounting in larger tanks.

Specifications

• Measuring range: 0–14 pH
• Temperature range: 0–70 °C
• Body diameter: 12.0 ± 0.5 mm
• Body length: 120 ± 5 mm
• Immersion depth: minimum 30 mm, maximum 100 mm
• Membrane shape: spherical
• Body material: glass
• Electrolytic junctions: ceramic
• Holder material: polypropylene
• Sealing ring: silicone rubber
• Cable: shielded, approx. 2 m
• Plug: BNC-50
• Weight: 0.2 kg

What it works with

The electrode is listed in the CO2 and fertilization category of aquarium systems, and it is designed for use with meters that have a BNC-50 socket. Its 30–100 mm immersion range allows it to sit in tanks of varying depth, and the protective cap guards the membrane when the electrode is not in use.