HM Digital TDS-4 Pocket-Size TDS Meter Pentek 5V button cell batteries (included)

5V button cell batteries (included) (LR44 or equivalent)

Layer 2: 25 micron nominal rating

1 x Viqua E/E+/E4/E4+/PRO 7 Quartz Sleeve (602733)

1 x COM-80 EC/TDS HydroTester

1 x downflow piston

HM Digital TDS-4 Pocket-Size TDS Meter Pentek 5V button cell batteries (included)Description The HM TDS 4 Pocket Size TDS Meter is great for a variety of water purification applications, including residential drinking water, pool & spas,hydroponics, fresh water aquariums, and colloidal silver. Ease of use and convenient size make it perfect for commercial or personal use. Resources HM Digital TDS 4 Meter Manual Tech Specs Range: 0 990 ppm (mg L) Resolution: 1 ppm (0 999 ppm) Accuracy: + 2% EC to TDS Conversion Factor: NaCl (avg.