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  HM Digital - TDS-4: Pocket-Size Total Dissolved Solids Meter

  MSRP:$35.00

  $21.00

  
• 
  HM Digital - TDS-EZ: Economy Total Dissolved Solids Water Quality Tester

  MSRP:$24.99

  $18.99

  
• 
  
  HM Digital - COM-100: Waterproof Electrical Conductivity/Total Dissolved Solids/Temperature Combo Meter

  MSRP:$74.95

  $59.95

  

• 
  
  HM Digital - PH-200: Waterproof pH meter

  MSRP:$79.99

  $79.95

  
• 
  HM Digital - TM-1: Digital Thermometer
  $42.99

  
• 
  
  HM Digital - PS-100: Panel Mount Total Dissolved Solids Controller

  MSRP:$168.00

  $159.95

  

• 
  
  HM Digital - PS-200: Dual Total Dissolved Solids Controller

  MSRP:$208.00

  $199.95

  
• 
  
  HM Digital - PS-202: Dual Display Total Dissolved Solids Controller

  MSRP:$238.00

  $224.95

  
• 
  
  HM Digital - PSC-150: Extended Range Electrical Conductivity/Total Dissolved Solids Controller

  MSRP:$208.00

  $199.95

  

• 
  
  HM Digital - PSC-154: Total Dissolved Solids/Electrical Conductivity Controller with 4-20mA Output

  MSRP:$298.00

  $274.95