Myronl L DOSRE-Ultrapen Series for replenishment electrolyte 2 oz

DO membrane 5PK, replenishment electrolyte 2 oz syringe with tip kit

Replacement N type battery Due to shelf life issues we are now supplying generic N type batteries that have an extra long 10 year shelf life.  Image may not be the same as the actual item...

Myron L PT5 Ultrapen Pocket Tester PT5 Dissolved Oxygen (DO) Pen. This instrument is designed to be