Usage Tips: The combined electrode consists of a needle indicating electrode and a silver-chloride reference electrode. It serves as a measuring element for ORP meters and water quality testers to measure the ORP of solutions or water. Ideal for use in water sources, aquariums, hydroponics, laboratories, spas, swimming pools, and other water systems. Features: Widely used for testing the ORP of solutions or water. High-quality laboratory ORP electrode probe. Compatible with most ORP meters and controllers equipped with a BNC Q9 connector. Filled with saturated solution. Suitable for printed circuit board applications and online ORP measurement in chromium-containing wastewater treatment. Made from environmentally friendly materials that are safe for humans and offer excellent conductivity. Specifications: Type: ORP-101 Type: Laboratory Electrode Probe Type: Sensitive Crystal Ball Bubble Range: 0 to ±1999 mV Accuracy: ±5 mV Applicable Temperature Range: 5 to 70°C Electrode Potential: 245–270 mV (15–30°C) Internal Resistance of Reference Electrode: ≤10 kΩ Electrode Stability: ±8 mV/24h Indicator Electrode Conductivity: Good Electrode Plug Type: Q9 BNC: Upright pH Electrode Cable Length: 70 cm / 27.5 in Item Size: 155 x 20 x 20 mm / 6.1 x 0.8 x 0.8 in (ORP Electrode) Color: As shown Material: Plastic Package Contents: 1 x ORP Electrode Probe Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement error allowance is ±1–3 cm.