The SpaChlorinator is a replacement electrode for the hobbyist that only wants an electrode. It uses up to 12 Vdc, and the salt level should be between 1,500 and 2,000 PPM.

SpaChlorinator Features:

10 Foot 18 AWG Cable & Connectors 
Electrical Requirements: 12 Vdc, 0.6 A
Water flows by convection; bubbles travel up and out 
Clear Housing for easy care and cleaning
Industry-Standard Titanium Electrodes
Easy replacement in minutes 
Cable grip for installing in the spa shell 
6 Month Warranty