pH & ORP Probe 300cm BNC Cable – Aquarium & Hydroponics
pH & ORP Probe 300cm BNC Cable – Aquarium & Hydroponics
pH & ORP Replacement Probe with 300cm BNC Cable – Aquarium, Hydroponics & Lab Testing
Keep your water quality measurements accurate and consistent with this versatile pH & ORP Replacement Probe. Featuring a generous 300 cm (3-meter) BNC cable and built-in automatic temperature compensation (ATC), this probe delivers stable, fast readings across a wide range of applications — from home aquariums and fish tanks to hydroponics systems, swimming pools, spas, laboratories, and industrial water testing.
The universal BNC connector makes this probe a true drop-in replacement compatible with virtually any pH meter or ORP controller that uses a standard BNC input. Whether you're upgrading an existing setup or replacing a worn-out electrode, this probe slots right in without any adapters.
Key Features
- Wide Measuring Range: 0.00–14.00 pH — covers acidic, neutral, and alkaline solutions
- Automatic Temperature Compensation (ATC): 0–50°C for consistent accuracy across varying water temperatures
- Long 300 cm Cable: Provides excellent reach for deep tanks, large reservoirs, and remote monitoring setups
- Universal BNC Connector: Compatible with most pH meters, ORP meters, and water quality controllers with a BNC interface
- Combination Electrode: Integrates an indicator electrode and a silver chloride reference electrode in one body for reliable ORP measurement
- Fast Response Time: ≤ 1 minute to a stable reading
- Durable ABS Construction: 12 mm diameter probe built to handle regular submersion
Technical Specifications
- pH Measuring Range: 0.00–14.00 pH
- Operating Temperature: 0–60°C
- ATC Range: 0–50°C
- Zero Point: 7 ± 0.5 pH
- Alkalinity Error: ≤ 0.2 pH
- Theoretical Slope: ≥ 98.5%
- Internal Resistance: ≤ 250 MΩ
- Response Time: ≤ 1 minute
- Probe Diameter: 12 mm
- Cable Length: 300 cm (~3 metres)
- Connector: BNC
- Material: ABS
Ideal Applications
- Aquariums & fish tanks
- Hydroponics & irrigation systems
- Swimming pools & spas
- Kombucha brewing & fermentation monitoring
- Laboratory & scientific research
- Industrial & wastewater water quality testing
- Drinking water analysis
Package Contents
- 2 × PH-201 Electrodes
- 1 × pH 4.01 Buffer Solution
- 1 × pH 6.86 Buffer Solution
- 2 × pH ORP Buffers
Made in China.
Note: Actual product colour may vary slightly from images due to monitor brightness and lighting conditions. Please allow for minor measurement deviations.
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Frequently Asked Questions
Q: Is this pH ORP probe compatible with my existing pH meter or controller?
A: Yes — as long as your pH meter or water quality controller uses a standard BNC connector, this replacement probe will be fully compatible. The universal BNC interface is the most common connector type used across pH meters, ORP meters, and water quality analysers from virtually all major brands.
Q: What is automatic temperature compensation (ATC) and why does it matter?
A: Automatic temperature compensation (ATC) automatically adjusts pH readings to account for changes in water temperature, which can affect measurement accuracy. This probe's ATC range of 0–50°C ensures you get consistent, reliable results whether you're testing a cold aquarium, a warm pool, or a heated hydroponics reservoir — without needing to manually correct for temperature.
Q: How do I care for and store the pH ORP probe to maximise its lifespan?
A: When not in use, keep the probe tip submerged in a small amount of storage solution or pH 4.01 buffer — never allow the glass bulb to dry out completely, as this can damage the electrode membrane. Rinse the probe gently with clean water between measurements and avoid scratching the glass tip. Proper storage will help maintain accuracy and extend the working life of the probe significantly.
Q: Can this probe be used for both pH and ORP measurements?
A: This listing includes both pH electrodes and ORP replacement probes. The ORP probe contains a combination electrode (indicator electrode + silver chloride reference electrode) specifically designed for measuring the oxidation-reduction potential (ORP) of water — ideal for pools, aquaculture, and water treatment systems. Always match the correct probe type to the corresponding meter input for accurate readings.