Feature: 1. ORP Electrode: Safe for human contact with excellent conductivity, commonly used in testing aqueous solutions. 2. Wide Compatibility: Designed for most ORP meters and controllers with BNC and Q9 connectors, suitable for water systems including aquariums, hydroponics, and swimming pools. 3. pH Testing: Measures pH levels in aqueous solutions for precise adjustments; must be used with a compatible meter. 4. High Conductivity: Constructed from durable, eco-friendly materials, ensuring reliable performance and strong electrical conductivity. 5. ORP Probe: Helps monitor oxidation-reduction potential in water, aiding in the detection and reduction of harmful substances. Specification: Item Type: ORP Replacement Probe Material: Plastic Electrode Length: Approx. 155mm / 6.1in (shipped with liquid) Probe Type: Sensitive Crystal Ball Bubble Range: 0–1999mV Accuracy: ±5mV Temperature Range: 5–70°C Electrode Potential: 245–270mV (at 15–30°C) Reference Electrode Internal Resistance: 10kΩ Electrode Stability: ≤8mV/24h Indicator Electrode Properties: Good conductivity Electrode Plug Type: Q9 pH Electrode Wire Length: Approx. 1.2m / 3.93ft Gross Weight: Approx. 89g / 3.14oz Suitable for use in water systems such as aquariums, hydroponics, hot springs, and swimming pools. Package List: 1 x ORP Electrode Note: New or old version may be shipped at random. Please confirm acceptance before ordering.