HM Digital SP-1/SP-1-PSC Replacement Sensor Used with HM Digital Controllers PSC-150, PSC-154 and CIC-152 to include the older PC and PS series controllers.

HM Digital introduces its new AquaPro series, a line of handheld TDS/EC meters with a sleek design that's perfect for today's modern kitchen. The AquaPro digital water testers are the next...

Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology...

Brand New! The COM-80 is a reliable, economically priced, EC/TDS meter that is perfect for testing applications like hydroponics, gardening, pools, spas, aquariums, reef tanks, water ionizers,...

ORP-200: Waterproof ORP Meter Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring,...

Replacement probe for PH-200: Waterproof pH Meter for Measures pH and Temperature.

Measuring the pH value of water-based solutions is important for various applications. This can be easily done using HM Digital PH-80 pH Hydro Tester. This device is economically priced, and...

SP-C1HM Digital Replacement Sensor for COM-100 HM Digital Replacement Sensor for COM-100

SP-O2HM Digital Replacement Sensor for ORP-200 HM Digital Re