HM Digital - Great Lakes International, Inc.

• AP-1: AquaPro Water Quality Tester (TDS)

• AP-2: AquaPro Water Quality Tester (EC)

• COM-100: EC / TDS / Temperature Meter

• EC-3: Conductivity Tester & Carrying Case

• ORP-200: Waterproof ORP Meter

• pH-200: Waterproof pH Meter

• TDS-3: Handheld Meter & Carrying Case

• TDS-4: Pocket Size Handheld Meter

• TDS-4TM: Meter with Digital Thermometer

• TDS-EZ: Water Quality Tester

• ZT-2: Basic & Handheld TDS Tester

• TM-1: Industrial Digital Thermometer

HM DIGITAL HANDHELD TESTERS