The HM Digital SM-1 is a permanently installed single-line TDS monitor. One ¼" sensor sits in the line — typically on the product side — and a button gives an instant reading, so you can tell whether a cartridge or membrane is still doing its job.
It pairs naturally with the dual-line DM-2 or a handheld meter when you want to compare feed against product. Dual-range to 9990 ppm with an ‘x10’ multiplier above 999 ppm, and it powers itself down after 10 minutes to protect the batteries.
Specifications transcribed from HM Digital SM-1 Manual Ver 2.1E.
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1 Year Limited Warranty, HM Digital, Inc.
