SPER Scientific Large Display Digital pH Pen Water Quality Testing NEW in box
SPER Scientific Large Display Digital pH Pen. I bought this pH pen new several years ago, and it has been in storage. It has not been used. Water Quality testing for streams and other water bodies.
SPER Scientific Large Display Digital Conductivity Pen Water Quality NEW in box
SPER Scientific Large Display Digital Conductivity Pen, 850037. Condition: NEW in open box. I bought this conductivity pen new several years ago, and it has been in storage. It has not been used. Batteries not included.