The combined electrode consists of a needle indicating electrode and a silver-chloride silver reference electrode. It serves as the measuring element for ORP meters and water quality testers, used to measure the ORP of solutions or water. Suitable for use in water sources, aquariums, hydroponics, laboratories, spas, swimming pools, and other water systems. Features: - Widely used for testing ORP of solutions or water - High-quality laboratory ORP electrode probe - Compatible with most ORP meters and controllers equipped with BNC or Q9 connectors - Filled with saturated solution, ideal for applications such as printed circuit board processing and online ORP measurement in chromium-containing wastewater treatment - Made from environmentally friendly materials, safe for human contact, with excellent conductivity Specifications: - Model: ORP-101 - Type: Laboratory Electrode Probe - Sensing Element: Glass bulb - Measurement Range: 0 to 1999 mV - Accuracy: ±5 mV - Operating Temperature Range: 5 to 70°C - Electrode Potential: 245–270 mV (at 15–30°C) - Reference Electrode Internal Resistance: ≤10 kΩ - Electrode Stability: ≤8 mV/24 hours - Indicator Electrode: High conductivity type - Connector Type: BNC/Q9 (straight) - 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 in picture - Material: Plastic Package Contents: 1 x ORP Electrode Probe Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting effects and monitor settings may cause slight color variations between the image and the actual product. Measurement tolerances may vary by ±1–3 cm.