HQ40D Digital portable multi meter kit, one channel, w/ PHC201 standard gel pH & LDO101 electrodes, 1 m cable | Hach Ireland - Overview - Obsolete | Hach
HQ30D Digital portable multi meter kit, one channel, w/ PHC201 standard gel pH & LDO101 electrodes, 3 m cable | Hach United Kingdom - Overview - Obsolete | Hach
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AERO-GRO 5-in-1 TDS/pH Meter - IP67 Waterproof, 5 Functions: pH, TDS, EC, Salinity, Temperature, 0.01 Resolution, High-Accuracy Pen-Type Tester for Hydroponics, Water, Wine, Spas, Aquariums, White: Amazon.com: Industrial & Scientific
HQ430D Benchtop pH, Conductivity, Dissolved Oxygen, ORP, and ISE Multi-Parameter Meter, 1 Channel | Hach Canada - Overview
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Wireless pH monitor METER Multi-channel multi-point remote real time transmitter and receiver up to 6 channels Long distance
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