HM Digital SP-1-PSC TDS/EC Sensor for the PS/PC and PSC Series Controllers

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,...

Clearance ( NEW OLD STOCK ) - small scratch on screen     Brand New! The COM-80 is a reliable, economically priced, EC/TDS meter that is perfect for testing applications like hy

HM Digital COM-300: Waterproof Professional Series pH/EC/TDS/Temp Meter The COM-300 is a professional grade level pH/EC/TDS/Temp meter ideal for all water quality testing, hydroponics, water

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...

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

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