Probe Maintenance Kit, Each

Details:

1213U81 (wd-35640-80): includes two complete membrane cap assemblies and 50ml of electrolyte solution.1213U80 (wd-35640-72): replacement membrane assembly consists of a preassembled membrane, membrane lock, o-ring, and cap. Simply screw replacement membrane assembly onto your probe.7232C13 (wd-35640-79): membrane installation tool lets you remove and replace membrane in the lab or field.