2 Sensor Inline Dual TDS Water Quality Monitor

The HM Digital DM-1 is a two-sensor inline monitor for comparing total dissolved solids (TDS) at two points in a water-filtration system. Use the IN/OUT selector to view source-water and filtered-water readings on the same display.

Two-point water monitoring

• Model: HM Digital DM-1 Dual TDS Monitor.
• Two sensor lines for comparing water before and after filtration.
• TDS readings displayed in parts per million (ppm).
• Suitable for monitoring reverse-osmosis and deionization systems used in aquarium water preparation.

Position the sensors to suit the filtration stages you want to compare, following the manufacturer’s installation instructions.