Galvanic Dissolved Oxygen electrode, ATC. Comes with 1 assembled membrane cap housing, 1 refilling electrolyte & 1 scouring pad.
Conductivity electrode with stainless steel rings, PBT and ultem body.
General purpose plastic-body "3-in-1" pH/Temperature combination electrode.
Conductivity electrode with stainless steel rings, PBT and ultem body
Conductivity electrode. Graphite with epoxy-body