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This cartridge fits any standard 20-inch Big Blue housing with 4
hydrogen chloride
test samples at the same temperature each time and always zero your photometer with untreated sample water before adding reagent
25 Tests Per Bottle No Glass Required Fe+2 Specific
Clack (R7031-500K) 500K OHM Resilites DI Light 110V; 1-2" MIP 20 inch x 4.5 inch Big Blue Filters2033 This cartridge fits any standardThe Clack R7031 500K is a 500K ohm Resilites deionization indicator light engineered for reliable visual monitoring of DI resin exhaustion in water treatment systems. This 110V unit features standard 1 2" male iron pipe threads for straightforward integration into softener and deionization applications. SPECIFICATIONS Technical Details Model Number R7031 500K Resistance 500K OHM Voltage 110V AC Connection Size 1 2" MIP (Male Iron Pipe) Manufacturer
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