HM Digital DM-1 Dual TDS Meter 000 Hours it can work with the

it can work with the following Whirlpool Ice Machine brands: Maytag

(1) S463RL Sterilight Lamp

Sterilight Quartz Sleeve (1): QSO-950

Coil Length: 250'*

QL7I: Single Head

HM Digital DM-1 Dual TDS Meter 000 Hours it can work with theThis water quality tester accurately measures the TDS level in your tap (feed) water and purified (product) water. It enables you to determine just how good or bad your water really is! Use the meter to determine when the reverse osmosis membrane needs replacing. Specifications: Available with 1 4" and or 3 8" quick connect fittings. The DM 1 NF does not come with fittings. Highly efficient and accurate due to its advanced microprocessor technology