High-quality BNC connector, compatible with most pH meters and controllers featuring a BNC connection. Suitable for a wide range of applications including aquariums, hydroponics, and laboratory use. Measurement range: 0.00–14.00 pH pH at 25°C: 7 ± 0.5 pH Accuracy: 0.2 pH Theoretical percentage slope: 98.5% Internal resistance: 250 MΩ Response time: 1 minute Operating temperature: 0–60 °C Connector type: BNC plug Color: Black Material: Plastic Package contents: 1 × PH-201 electrode 1 × pH 4.01 buffer powder 1 × pH 6.86 buffer powder Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the product image and the actual item. Measurement error tolerance: ±1–3 cm.