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EC is often converted to TDS in parts per million (ppm)

999 gallons or liters

The Milwaukee PRO TDS monitor has a range of 0 to 1990 (ppm) with visual alarms that activate when readings are higher or lower than set point

factory sealed

Alexapure Breeze Replacement Pre-Filter LSM-100 Display: 2Description Keep your Alexapure Breeze air purifier running at peak performance. This pre filter is rugged and designed for a long life with regular maintenance. If the tabs break or the mesh tears, you will need to replace it to get the most of your Breeze's four stage filtration. Your Breeze Certified pre filter is also hand washable, which extends the life of the filter. Alexapure Breeze Pre Filter Features: Traps large air allergens particles like