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    $269.99
    Hanna Ph/EC/TDS/Temperature Portable Meter, Range: Ph 0.0 To 14.0 Ph EC 0.00 To 4.00 Ms/Cm TDS 0 To 1999 Ppm (Mg/L) - HI9813-51
    Hanna Instruments
    $269.99
    Hanna Ph/EC/TDS/Temperature Portable Meter, Range: Ph 0.0 To 14.0 Ph EC 0.00 To 4.00 Ms/Cm TDS 0 To 1999 Ppm (Mg/L) - HI9813-51
    Hanna Instruments
    $279.99
    Hanna Ph/EC/TDS/Temperature Meter With CAL Check - HI9813-61
    Hanna Instruments
    $279.99
    Hanna Ph/EC/TDS/Temperature Meter With CAL Check - HI9813-61
    Hanna Instruments
    $269.99
    Hanna Ph/EC/TDS/Temperature Meter With HI1285-51 Electrode EC Range: 0 To 6000 Μs/Cm, TDS Range: 0 To 3000 Ppm (Mg/L) - HI9811-51
    Hanna Instruments
    $269.99
    Hanna Ph/EC/TDS/Temperature Meter With HI1285-51 Electrode EC Range: 0 To 6000 Μs/Cm, TDS Range: 0 To 3000 Ppm (Mg/L) - HI9811-51
    Hanna Instruments
    $10.95
    Advanced Digital TDS Meter Water Quality Tester With Automatic Calibration, Temperature Button, And Leather Case
    Home Depot
    105
    Free shipping
    $10.95
    Advanced Digital TDS Meter Water Quality Tester With Automatic Calibration, Temperature Button, And Leather Case
    Home Depot
    $59.99
    Aquafx Dual Inline TDS Aquarium Meter
    Chewy.com
    $59.99
    Aquafx Dual Inline TDS Aquarium Meter
    Chewy.com
    $696.07
    $702.50
    Oakton WD-35604-21 TDS 6+ Total Dissolved Solids Meter W/Probe & NIST
    Test Equipment Depot
    $696.07
    $702.50
    Oakton WD-35604-21 TDS 6+ Total Dissolved Solids Meter W/Probe & NIST
    Test Equipment Depot
    $1,185.50
    Oakton Test Meter, Ph/ORP/TDS/Conductivity/Salinity: Handheld Meter Kit, -2.00 To 16.00, 0 To 200 Ms Model: 35660-26
    Grainger
    $1,185.50
    Oakton Test Meter, Ph/ORP/TDS/Conductivity/Salinity: Handheld Meter Kit, -2.00 To 16.00, 0 To 200 Ms Model: 35660-26
    Grainger
    $119.66
    Extech TDS/Conductivity/Salinity Pen: Handheld, 0 To 99.9 Ppm/100 To 999 Ppm/1.00 To 9.99 Ppt Model: EC400
    Grainger
    147
    $119.66
    Extech TDS/Conductivity/Salinity Pen: Handheld, 0 To 99.9 Ppm/100 To 999 Ppm/1.00 To 9.99 Ppt Model: EC400
    Grainger
    $2.99
    Portable LCD Digital TDS Water Quality Tester Water Testing Pen Filter Meter Measuring Tools Accessory For Aquarium Pool
    Temu US
    $2.99
    Portable LCD Digital TDS Water Quality Tester Water Testing Pen Filter Meter Measuring Tools Accessory For Aquarium Pool
    Temu US
    $314.21
    Lamotte Ph/TDS/Salt Meter: Handheld, 0.00 To 14.00, 0 To 99.96 Ppm/100 To 999 Pm/1.0 To 9.99 Ppt Model: 1766
    Grainger
    $314.21
    Lamotte Ph/TDS/Salt Meter: Handheld, 0.00 To 14.00, 0 To 99.96 Ppm/100 To 999 Pm/1.0 To 9.99 Ppt Model: 1766
    Grainger
    $20.65
    7-In-1 Water Quality Tester, Multifunctional Analysis Instrument Test Pen, PH/ORP/EC/TEMP/SALT/S.G/TDS LCD Backlight
    Temu US
    $20.65
    7-In-1 Water Quality Tester, Multifunctional Analysis Instrument Test Pen, PH/ORP/EC/TEMP/SALT/S.G/TDS LCD Backlight
    Temu US
    $14.96
    HM Digital TDS-EZ, Water Quality Tester
    Selectum
    $14.96
    HM Digital TDS-EZ, Water Quality Tester
    Selectum
    $4.39
    $5.49
    Cloud Prime 3-In-1 TDS Water Quality Test Pen - Dual Backlight, EC Conductivity & Temperature Measurement, Battery Operated
    Temu US
    20% off
    $4.39
    $5.49
    Cloud Prime 3-In-1 TDS Water Quality Test Pen - Dual Backlight, EC Conductivity & Temperature Measurement, Battery Operated
    Temu US
    $14.96
    HM Digital TDS-3, Handheld TDS Meter With Carrying Case
    Selectum
    $14.96
    HM Digital TDS-3, Handheld TDS Meter With Carrying Case
    Selectum
    $14.44
    2-Button Digital TDS Meter With Backlit LCD
    Home Depot
    Free shipping
    $14.44
    2-Button Digital TDS Meter With Backlit LCD
    Home Depot
    $391.50
    YSI EC300A Conductivity,TDS, Salinity,Temp Instrument Only, 606079
    TEquipment
    $391.50
    YSI EC300A Conductivity,TDS, Salinity,Temp Instrument Only, 606079
    TEquipment
    $18.71
    HM Digital TDS-4TMA, Pocket Size TDS/Temp Meter W/Aquarium Pkg
    Selectum
    $18.71
    HM Digital TDS-4TMA, Pocket Size TDS/Temp Meter W/Aquarium Pkg
    Selectum
    $128.77
    Extech Conductivity/TDS/Salinity/Temp Meter Conductivity Probe Qty 1 | Conductivity/Tds/Salinity/Te Pkg Qty 1 | 88636931
    FleetPride
    $128.77
    Extech Conductivity/TDS/Salinity/Temp Meter Conductivity Probe Qty 1 | Conductivity/Tds/Salinity/Te Pkg Qty 1 | 88636931
    FleetPride

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