COM-100 Waterproof EC / TDS / Temperature Combo Meter HM Digital $54.00 $64.95 Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology... Add to Cart
HM Digital ORP-200 Waterproof ORP Meter HM Digital $77.00 $110.00 ORP-200: Waterproof ORP Meter Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine... Add to Cart
HM Digital Replacement Sensor for ORP-200 HM Digital $44.00 SP-O2HM Digital Replacement Sensor for ORP-200HM Digital Replacement Sensor for ORP-200 Add to Cart
HM Digital Replacement Sensor for PH-200 HM Digital $31.46 $44.95 SP-P2HM Digital Replacement Sensor for PH-200 HM Digital Replacement Sensor for PH-200 Add to Cart
ORP Buffer Solution and Electrode Test Kit HM Digital $18.95 ORP Buffer Solution and Electrode Test Kit HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite... Add to Cart
pH Buffer Solution Variety Pack HM Digital $9.95 $18.00 HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life. Use these buffers with any pH instrument... Add to Cart
PH-200 Waterproof pH Meter HM Digital $70.00 $81.75 Ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing,... Add to Cart
PSC-154 HM Digital EC/TDS Controller w/ 4-20 mA signal and conductivity electrode HM Digital $181.00 $298.00 PSC-154: TDS/EC Controller with 4-20mA Output New controller includes extended range, digital calibration, on-screen temperature, tri-color display and 4-20mA output. *** Includes... Add to Cart
HM Digital AP-1 AquaPro Water Quality Tester (TDS) HM Digital $29.95 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... Add to Cart
HM Digital AquaPro AP-2 Water Quality Tester (EC) Conductivity HM Digital $25.75 $32.00 The conductivity of water is very important for water management. For controlling and managing these factors, various conductivity tests are performed on water sources. EC water quality testing... Add to Cart
HM Digital COM-80 EC/TDS HydroTester HM Digital $28.40 $46.95 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,... Add to Cart
HM Digital PH-80 pH HydroTester HM Digital $42.00 $59.95 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... Add to Cart