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TDS & Conductivity Meters

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  1. Product Code: 194802-16 FBM Lovibond SD70 Con Hand-Held Meter
    £93.40 £77.83
  2. Macro 900 Water Quality System
    Product Code: PT 1401 Macro 900 Water Quality System
    £1,731.05 £1,442.54
  3. Product Code: PT 153T Palintest TDS / Temperature Pen
    £128.27 £106.89
  4. Product Code: 194803-16 FBM Lovibond TDS / Temperature Pen
    £102.47 £85.39
  5. Product Code: EXPERTCTS Eutech Expert CTS Pocket Tester
    £62.99 £52.49
  6. Replacement electrode module for EC meter Trace2O
    Product Code: HL102ELEC Replacement electrode module for EC meter Trace2O
    £37.49 £31.24
  7. Product Code: HI-2003 Hanna Instruments-2003 Edge® Conductivity Meter
    £607.49 £506.24
  8. Product Code: HI-9835 Hanna Instruments-9835 Multiparameter EC/TDS/°C/NaCl
    £929.32 £774.43
  9. Product Code: HI-993310 Hanna Instruments-993310 Direct Soil Conductivity Kit
    £705.10 £587.58
  10. Product Code: HI-983307 Hanna Instruments-983307 EC Meter, 9.99 mS/cm
    £108.30 £90.25
  11. Product Code: HI-99301 Hanna Instruments-99301 EC/TDS/Temperature Meter
    £254.58 £212.15
  12. Product Code: TDSTestr 11 FBM Oakton TDSTestr 11
    £85.62 £71.35
    Out of stock
  13. Product Code: Oakton PCSTestr 35 Oakton PCSTestr 35
    £152.40 £127.00
  14. TDS Calibration Solution 500ml 50PPM
    Product Code: PT 142/10 TDS Calibration Solution 500ml 50PPM
    £19.09 £15.91
  15. Calibration Solutions
    Product Code: PT 142/3 Palintest TDS Mid Range Conductivity Solution, 500 ml
    £20.10 £16.75
  16. TDS Calibration Solution 500ml 50PPM
    Product Code: PT 142/9 TDS Calibration Solution 500ml 300 PPM
    £16.36 £13.63
  17. Micro 600 TDS Meter
    Product Code: PT 1210 Micro 600 TDS Meter
    £535.50 £446.25
  18. Product Code: HI-7635 Hanna Instruments-7635 In-line Conductivity Probe
    £164.16 £136.80
  19. Product Code: HI-99300 Hanna Instruments-99300 EC/TDS/Temperature Meter
    £254.58 £212.15
  20. Product Code: BL-983322-0 BL-983322-0 Conductivity Controller (Low Range@ 19.99 µS/c)
    £200.64 £167.20
  21. Product Code: BL-983319-1 BL-983319-1 Mini TDS Controller 0 to 1999 ppm
    £200.64 £167.20
  22. Product Code: HI-8734 Hanna Instruments-8734 Multi-range TDS Meter
    £523.40 £436.17
  23. Product Code: HI-2315 Hanna Instruments-2315 Conductivity Bench Meter
    £993.61 £828.01
  24. Product Code: BL-983314-0 BL-983314-0 Resistivity Mini Controller
    £304.38 £253.65
  25. Product Code: BL-983315-1 BL-983315-1 TDS Mini Controller 0.00 to 199.9 mg/L
    £197.22 £164.35
  26. Product Code: HI-98308 Hanna Instruments-98308 Pure Water Test
    £104.88 £87.40
  27. Product Code: PRIMO1 PRIMO1 Pocket TDS Tester (0 to 1999ppm)
    £56.44 £47.03
  28. Product Code: BL-983329-0 BL-983329-0 TDS Mini Controller (Range 0 to 999 ppm)
    £200.64 £167.20
  29. Product Code: PRIMO5 PRIMO5 Pocket Conductivity Tester (0 to 1999uS)
    £51.30 £42.75
  30. Micro 600 Conductivity Meter
    Product Code: PT 1220 Micro 600 Conductivity Meter
    £533.36 £444.47

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Conductivity is a measurement of how well an aqueous solution can carry an electrical current. It is commonly used to determine the levels of impurities in the water, typically the more impurities in the water, the higher the conductivity value will be.


Absolutely pure water has a conductivity value around 0.055μS/cm, tap water typically has a value around 50-100μS/cm and sea water normally has a value around 53mS/cm.


To take a conductivity measurement, two plates are placed into the sample, a potential is applied across the plates, and the current is measured.


For most salts, there is a linear relationship between ion concentration and the conductivity value, although in some cases, such as sulphuric acid, it stops being linear when at very high concentrations.


TDS, short for Total Dissolved Solids, is an estimate of the mass of dissolved solids within the solution and is typically expressed as mg/L or parts per million (ppm). It is derived from the conductivity reading using a conversion factor.