pH & ORP BNC Replacement Probe – 300cm Cable, ATC

pH & ORP BNC Replacement Probe – 300cm Cable, ATC | Hydroponics

$138.21 $172.58

pH & ORP Replacement Probe with 300 cm BNC Cable

Upgrade your water quality monitoring setup with this precision pH & ORP Replacement Probe. Featuring a generous 300 cm (3-metre) shielded cable and a universal BNC connector, it fits virtually any pH meter or controller that uses a BNC interface — making it an effortless drop-in replacement for worn or inaccurate electrodes.

Built-in Automatic Temperature Compensation (ATC, 0–50 °C) ensures fast, stable readings across varying water temperatures, whether you are managing an aquarium, a hydroponic reservoir, a swimming pool, a kombucha brew, or a laboratory sample. The wide 0.00–14.00 pH measuring range covers virtually every freshwater and industrial testing application.

Key Features

Universal BNC Connector – compatible with any pH meter, ORP meter, or controller fitted with a BNC socket
300 cm (approx. 3 m) Cable – reach difficult tank or reservoir positions without straining the sensor
Automatic Temperature Compensation (ATC) – stable, accurate readings from 0 °C to 50 °C operating range (probe rated to 60 °C)
Full pH Range 0.00–14.00 – suitable for acidic, neutral, and alkaline water sources
ORP Combination Electrode – indicator electrode paired with a silver-chloride reference electrode; measures oxidation-reduction potential (ORP) of aqueous solutions
12 mm Probe Diameter – compact body fits standard probe holders and flow cells
High Slope Performance – theoretical percentage slope ≥ 98.5 % for precise calibration
Fast Response – stable reading in ≤ 1 minute
ABS Construction – durable, chemical-resistant housing

Ideal Applications

Aquariums & fish tanks
Hydroponic & aquaponic systems
Swimming pools & spas
Drinking water & irrigation monitoring
Laboratories & scientific research
Kombucha, brewing & fermentation
Wastewater & industrial water testing

Technical Specifications

Measuring Range	0.00 – 14.00 pH
Zero Point	7 ± 0.5 pH
Alkalinity Error	≤ 0.2 pH
Slope	≥ 98.5 %
Internal Resistance	≤ 250 MΩ
Response Time	≤ 1 minute
ATC Range	0 – 50 °C
Operating Temperature	0 – 60 °C
Cable Length	300 cm (~3 m)
Probe Diameter	12 mm
Connector	BNC
Material	ABS

Package Contents

2 × pH-201 Electrodes
1 × pH 4.01 Buffer Solution
1 × pH 6.86 Buffer Solution
2 × pH ORP Buffers

Made in Mainland China.

Note: Screen colours may vary slightly from the actual product. Please allow minor measurement tolerances in the listed dimensions.

Frequently Asked Questions

Q: Which pH meters is this BNC probe compatible with?

A: This pH & ORP replacement probe uses a standard BNC connector, making it compatible with virtually any pH meter, ORP meter, or pH controller that accepts a BNC-type electrode. This includes a wide range of bench-top meters, inline controllers used in hydroponics systems, aquarium controllers, and laboratory instruments.

Q: What does Automatic Temperature Compensation (ATC) mean for my readings?

A: pH readings can shift with water temperature. The built-in ATC feature automatically adjusts the electrode's output to account for temperature changes between 0 °C and 50 °C, ensuring you always get an accurate, stable pH value without manually applying correction factors.

Q: Can this probe be used in both aquariums and hydroponic systems?

A: Yes. The probe's 0.00–14.00 pH range and ORP measurement capability make it suitable for aquariums, fish tanks, hydroponic reservoirs, aquaponic systems, swimming pools, spas, laboratories, and any other freshwater or industrial water testing application that requires a BNC-connected electrode.

Q: How long is the cable, and why does the length matter?

A: The cable is approximately 300 cm (3 metres) long. A longer cable lets you position the probe directly inside a tank, sump, or reservoir while keeping the meter or controller safely away from splashes and moisture — particularly useful in large aquarium setups or commercial hydroponic rigs.