{"product_id":"ph-orp-replacement-probe-300cm-bnc-cable-aquarium-hydroponics-1","title":"pH \u0026 ORP Replacement Probe – 300cm BNC Cable | Aquarium Hydroponics","description":"\u003ch2\u003epH \u0026amp; ORP Replacement Probe with 300cm BNC Cable\u003c\/h2\u003e\n\u003cp\u003eUpgrade your water quality testing setup with this precision \u003cstrong\u003epH \u0026amp; ORP Replacement Probe\u003c\/strong\u003e. Featuring a generous \u003cstrong\u003e300 cm (3-metre) cable\u003c\/strong\u003e and a universal \u003cstrong\u003eBNC connector\u003c\/strong\u003e, it is compatible with virtually any pH meter or controller that uses a BNC interface — making it a seamless drop-in replacement for aquariums, hydroponics systems, swimming pools, laboratories, spas, and more.\u003c\/p\u003e\n\n\u003cp\u003eBuilt-in \u003cstrong\u003eAutomatic Temperature Compensation (ATC, 0–50 °C)\u003c\/strong\u003e ensures fast, stable, and accurate readings every time, eliminating the need for manual corrections. The wide measuring range of \u003cstrong\u003e0.00–14.00 pH\u003c\/strong\u003e covers virtually every water-testing scenario, from highly acidic to strongly alkaline solutions.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal BNC Connector\u003c\/strong\u003e — fits most pH meters, ORP meters, and water-quality controllers with a BNC port\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e300 cm Cable\u003c\/strong\u003e — extra-long reach for deep tanks, large reservoirs, and fixed installations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic Temperature Compensation\u003c\/strong\u003e — delivers consistent readings across a 0–50 °C operating range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide pH Range\u003c\/strong\u003e — measures 0.00–14.00 pH with a theoretical slope of ≥ 98.5 %\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eORP-Capable\u003c\/strong\u003e — combination electrode (indicator + silver-chloride reference) measures oxidation-reduction potential of aqueous solutions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRapid Response\u003c\/strong\u003e — stabilises in under 1 minute\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications\u003c\/strong\u003e — aquariums, fish tanks, hydroponics, irrigation, drinking water, kombucha brewing, pools, scientific research, wastewater, and industrial water testing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eABS Construction\u003c\/strong\u003e — durable, chemical-resistant housing; 12 mm probe diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasuring Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.00 – 14.00 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 cm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBNC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProbe Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZero Point\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7 ± 0.5 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTheoretical Slope\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≥ 98.5 %\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 250 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResponse Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 – 60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eATC Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 – 50 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABS\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 × PH-201 Electrodes\u003c\/li\u003e\n  \u003cli\u003e1 × pH 4.01 Buffer Solution\u003c\/li\u003e\n  \u003cli\u003e1 × pH 6.86 Buffer Solution\u003c\/li\u003e\n  \u003cli\u003e2 × pH ORP Buffers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Actual colour may vary slightly from images due to monitor brightness and lighting conditions. Please allow minor measurement tolerances in the listed dimensions.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/100-pcs-plant-support-clips-orchid-flower-vine-stem-garden\"\u003e100 PCS Plant Support Clips for Orchid, Flower \u0026amp; Vine Stems\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/garden-pruner-shears-secateurs-bonsai-fruit-trees\"\u003eGarden Pruner Shears – Secateurs for Bonsai \u0026amp; Fruit Trees\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0–10\/0–12\/0–25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is this pH \u0026amp; ORP replacement probe compatible with my existing BNC meter?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the probe uses a standard BNC connector, which is compatible with the vast majority of pH meters, ORP meters, and water-quality controllers that accept a BNC interface. Simply unplug your old probe and connect this one for an instant upgrade.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What applications is this probe suitable for?\u003c\/h4\u003e\n\u003cp\u003eA: This probe is designed for general water pH and ORP measurement across a wide range of applications, including aquariums, fish tanks, hydroponics setups, swimming pools, spas, irrigation systems, kombucha brewing, drinking water testing, scientific research, and industrial or wastewater monitoring.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this probe include Automatic Temperature Compensation (ATC)?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The probe features built-in Automatic Temperature Compensation across a 0–50 °C range, so it automatically corrects readings for ambient temperature changes, ensuring accurate and stable results without manual adjustment.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why is the cable 300 cm long?\u003c\/h4\u003e\n\u003cp\u003eA: The extra-long 300 cm (3-metre) cable provides the flexibility needed for deep aquariums, large reservoirs, or permanently installed monitoring systems where the meter or controller is positioned at a distance from the water source.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this pH \u0026amp; ORP replacement probe compatible with my existing BNC meter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the probe uses a standard BNC connector, which is compatible with the vast majority of pH meters, ORP meters, and water-quality controllers that accept a BNC interface. 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