Probe is in used condition but works excellent. The Hanna Instruments HI1285-7 is a 3-in-1 pre-amplified multiparameter probe designed specifically as a replacement probe for the Hanna Instruments HI9814 GroLine Waterproof Portable Meter. It is heavily utilized by greenhouse growers, agricultural professionals, and hydroponics hobbyists to simultaneously track critical nutrient solution metrics. If you have any questions or concerns feel free to reach out.