Hayward GLX-SALTMETER Digital Handheld Salt Meter Digital handheld salt meter replacement Fits hayward goldline aqua trol salt chlorine generator models aq-trol-rj, aq-trol-rj-tl, aq-trol-hp, aq-trol-hp-tl Also fits hayward goldline pro logic automation models pl-ps-8 , pl-ps-8-v