1 Pcs Ph-201 Electrode Probe & 1 pcs ORP-1 ORP Redox Electrode, Connector Probe1.BNC connector, suitable for most PH and controller BNC connectors2.has a large breaking force and can be adsorbed on the glass wall.3.With high-quality low-noise cable,the signal output length can be more than 20 meters without interference4.Signal stability,less interference. 5.Application: Suitable for a wide range of aquariums, hydroponics, laboratories and othersMaterial:plasticelectrode probe:Working temperature: 0 - 60 CelsiusResponse time: less than or equal to 1minH trial range: 0.00-14.00PHcolour:Blacksize:16cmCable length: 70CMORP Electrode 50 Ohm BNC Type:Replaceable ORP electrodeProvides instant ORP measurementSimple and comfortable to install and useHigh and accurate measurementComes with protective cap to ensure the safety of the bulb, Reliable, stable, and transportableMeasuring Range: -1999~1999mVResolution: 1mVAccuracy: +/- 0.1% F·S +/- 1 digitConnection: 50 Ohm BNC socketColour: greenSize: 3meterPackage Contents:1 * electrode probe1 * suction cup2 * PH paper1 * ORP Electrode 50 Ohm BNC TypeOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.