Milwaukee MW401 TDS - PPM Meter

Milwaukee Instruments MW401 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. ( MW 401 )