BNC connector, suitable for most pH meter and controller with BNC connector. Suitable for wide range of application: Aquariums, Hydroponics, Laboratory etc. Measurement range: 0.00-14.00 PH Zero-point: 7 +- 0.5PH Error: 0.2PH Theoretical Percentage Slope: 98.5% Internal Resistance: 250M Response Time: 1min Operating Temperature: 0-60C Terminal Blocks: BNC plug Cable length: . 70cm Colour:As Shown Material:Metal+Plastic Package Contents: 1 * pH Electrode Probe Only the above package content, other products are not included. Note: Light reflection 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.