HM Digital Com-300 Ph/Tds/EC/Temp Meter

HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy

HM Digital SP-P2 Replacement PH Sensor for PH-200

HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy,Purple

HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

HM Digital PH-80 pH Meter Waterproof PH80 Tester HydroTester

HM Digital TDS-4 Pocket Size TDS Tester Meter with 0-9990 ppm Measurement Range , 1 ppm Resolution, +/- 2% Readout Accuracy

HM Digital TM-1 Industrial Grade Digital Celsius and Fahrenheit Thermometer, -50 to +250 Degree C / -58 to +482 Degree F Temperature Range, Stainless Steel Probe, 20" Cable

HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume