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    $24.99
    Hanna 1382 Mg/L (Ppm) TDS Calibration Solution (1L) - HI7032/1L
    Hanna Instruments
    $24.99
    Hanna 1382 Mg/L (Ppm) TDS Calibration Solution (1L) - HI7032/1L
    Hanna Instruments
    $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
    $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
    $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
    $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
    $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
    $517.99
    Portable Conductivity/TDS Meter
    School Outfitters
    $517.99
    Portable Conductivity/TDS Meter
    School Outfitters
    $79.99
    Hanna Dist®1 Waterproof TDS Tester (0-2000 Ppm) - HI98301
    Hanna Instruments
    $79.99
    Hanna Dist®1 Waterproof TDS Tester (0-2000 Ppm) - HI98301
    Hanna Instruments
    $999.99
    Myron L 6PIIFCE Conductivity, Resistivity, TDS, Ph, ORP/Free Chlorine, Temperature Meter
    Amazon.com
    30
    Free shipping
    $999.99
    Myron L 6PIIFCE Conductivity, Resistivity, TDS, Ph, ORP/Free Chlorine, Temperature Meter
    Amazon.com
    $14.99
    5 in 1 TDS Water Quality Tester, Swimming Pool Tester, 0.01 High Precision Digital PH Water Quality Tester, PH/ TDS/ EC Temperature Tester, PPM
    Temu US
    $14.99
    5 in 1 TDS Water Quality Tester, Swimming Pool Tester, 0.01 High Precision Digital PH Water Quality Tester, PH/ TDS/ EC Temperature Tester, PPM
    Temu US
    $219.96
    HM Digital HM-200 Ph/EC/TDS/Temp Monitor
    Hydrobuilder
    2
    $219.96
    HM Digital HM-200 Ph/EC/TDS/Temp Monitor
    Hydrobuilder
    $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
    $4.30
    $5.38
    Cloud Prime 3-In-1 TDS Water Quality Test Pen - Dual Backlight, EC Conductivity & Temperature Measurement, Battery Operated
    Temu US
    20% off
    $4.30
    $5.38
    Cloud Prime 3-In-1 TDS Water Quality Test Pen - Dual Backlight, EC Conductivity & Temperature Measurement, Battery Operated
    Temu US
    $1,699.99
    Hanna Multiparameter Ph/EC/TDS/Salinity/DO/Pressure/ Temperature Waterproof Meter - HI98194
    Hanna Instruments
    $1,699.99
    Hanna Multiparameter Ph/EC/TDS/Salinity/DO/Pressure/ Temperature Waterproof Meter - HI98194
    Hanna Instruments
    $168.00
    Water Quality Online EC TDS Analyzer Measuring Resistivity Conductivity TDS Salinity Meter Sensor
    Alibaba.com
    $168.00
    Water Quality Online EC TDS Analyzer Measuring Resistivity Conductivity TDS Salinity Meter Sensor
    Alibaba.com
    $23.99
    HM Digital (TDS-EZ) TDS Meter-Monitor For "Total Dissolved Solids"
    Isopure Water
    7K+
    $23.99
    HM Digital (TDS-EZ) TDS Meter-Monitor For "Total Dissolved Solids"
    Isopure Water
    $892.00
    Myron L 4PII Conductivity, Resistivity, TDS, Temperature Meter
    Amazon.com
    5
    Free shipping
    $892.00
    Myron L 4PII Conductivity, Resistivity, TDS, Temperature Meter
    Amazon.com