Features1、ORP Electrode: It is harmless to the human body and has good conductivity, and widely used in the test of aqueous solutions.2、Wide Use: For most ORP meters and controllers with BNC Q9 connectors, used in water source systems such as aquariums, hydroponics, swimming pools.3、PH Test: Measure the pH value in the aqueous solution for accurate up and down adjustment, which needs to be used in conjunction with the meter.4、Strong Conductivity: The ORP replacement probe is made of sturdy and durable materials, has good conductivity, and is environmentally friendly.5、ORP Probe: Different water quality ORP ion oxidation degree is always can help remove harmful substances in the water you use to.SpecificationsItem Type: ORP Replacement ProbeMaterial: PlasticElectrode Length: Approx. 155mm / 6.1in (Delivered with liquid)Probe Type: Sensitive Crystal Ball BubbleRange: 0~±1999mVAccuracy: ±5mVApplicable Temperature Range: 5~70℃Electrode Potential: 245-270mv (15~30℃)Internal Resistance of Reference Electrode: ≤10kΩElectrode Stability: ±8mv/24Electrode Indicator Electrode: Good ConductivityPH Electrode Wire Length: Approx. 1.2m / 3.93ftGross Weight: Approx. 89g / 3.14ozCan be widely used in water source systems such as aquariums, hydroponics, hot springs, swimming pools, etc.Package List1 x Electrode