Model: AR-122 Koolermax series. FREE TDS monitor: (HM Digital DM-2 TDS monitor). Use the TDS monitor to check the water quality of purified water, put them before DI and after DI filters. We use 2 Nuclear-grade color changing DI filter with refillable Clear housing and DI dispensing ball Valve for applications like Reef, Aquarium, hydroponics, humidifier, jewelry cleaning, any application requiring ultra pure water.
eBay