Price history on Walmart.com for
Milwaukee MW401 PRO Low Range Total Dissolved Solids Meter for Aquaculture
See on WalmartProduct info
TDS - PPM Meter Range: 0 -1990 ppm - With Automatic Temperature Compensation (ATC) and 1 Point Manual Calibration Supplied with MA811D/1 TDS Probe a 9 Volt Battery a 20 ml - 1382 ppm Sachet Calibration Solution and Screwdriver for Calibration.- SKU: MWKIM049
... read more.