Features 1. ORP Electrode: Safe for human contact with excellent conductivity, suitable for testing aqueous solutions. 2. Wide Compatibility: Designed for most ORP meters and controllers with BNC and Q9 connectors. Ideal for use in water systems such as 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, environmentally friendly materials with reliable electrical conductivity. 5. ORP Probe: Helps monitor oxidation-reduction potential in water, aiding in the detection of water quality changes. Specifications Item Type: ORP Replacement Probe Material: Plastic Electrode Length: Approx. 155mm / 6.1in (shipped with storage solution) Probe Type: Sensitive Crystal Ball Measurement Range: 0 to ±1999mV Accuracy: ±5mV Temperature Range: 5 to 70°C Electrode Potential: 245–270mV (at 15–30°C) Reference Electrode Internal Resistance: ≤10kΩ Electrode Stability: ±8mV over 24 hours Indicator Electrode: High conductivity pH Electrode Cable Length: Approx. 1.2m / 3.93ft Gross Weight: Approx. 89g / 3.14oz Application: Suitable for water systems including aquariums, hydroponics, spas, and swimming pools. Package List 1 x ORP Electrode