The combined electrode consists of a needle indicator electrode and a silver/silver chloride reference electrode. It is a measuring element for ORP meters and water quality testers, used to measure the oxidation-reduction potential (ORP) of solutions and water. Suitable for use in water sources, aquariums, hydroponics, laboratories, spas, swimming pools, and other water systems. Features: - Designed for accurate ORP measurement of solutions and water - Laboratory-grade ORP electrode probe - Compatible with most ORP meters and controllers featuring a BNC or Q9 connector - Filled with saturated potassium chloride solution - Suitable for printed circuit board manufacturing and online ORP monitoring in wastewater treatment applications - Made from environmentally friendly, non-toxic plastic with excellent conductivity Specifications: - Model: ORP-101 - Type: Laboratory electrode probe - Sensing element: Crystal ball bubble - Measurement range: 0 to ±1999 mV - Accuracy: ±5 mV - Operating temperature range: 5°C to 70°C - Electrode potential (at 15–30°C): 245–270 mV - Reference electrode internal resistance: ≤10 kΩ - Stability: ±8 mV per 24 hours - Indicator electrode conductivity: High - Connector type: Q9 / BNC (straight) - Cable length: 70 cm (27.5 in) - Dimensions (electrode only): 155 × 20 × 20 mm (6.1 × 0.8 × 0.8 in) - Color: As shown - Material: Plastic Package includes: 1 × ORP electrode probe Note: Colors may vary slightly due to lighting conditions and screen settings. Dimensional tolerance: ±1–3 cm.