HM Digital TDS-4 Pocket Meter.

Range: 0 - 9990 ppm (mg/L)

Resolution: 0-999: 1 ppm; 1000-9990 10 ppm (indicated by a 'x10' icon)

Accuracy: +/- 2%

EC-to-TDS Conversion Factor: NaCl (avg. 0.5)

ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to

122 degrees Farenheit)

Replaces: WP-2000 TGI-SPRITE TDS POCKET METER