HI 7698282 Probe Maintenance Kit Probe maintenance kit to be used with HI 9828 and HI 9829 series multiparameter meters.  This kit includes HI 7042S (electrolyte solution for DO sensor), (5) O-rings for DO sensor, a small brush,  (5) O-rings for multiparameter probe and a syringe with grease to lubricate the O-rings. Read More »