Online secure purchasing: Buy online today - All prices include VAT and delivery

Calibration Fluid

See also: TDS Meters | PH Meters

TDS Meter Calibration Fluid (342 ppm)


NaCl calibration solution, available in 342 ppm.
Comes in lightweight HDPE plastic bottles.
Sealed with a coated foam liner.


NaCl solution
Available in 342 ppm
3 oz. bottles (88.7 ml)

Price includes delivery to UK Mainland

Price - £5.30 (£6.36 including vat and delivery)


pH7 Buffer Solution

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.
Sold in packs of 5.


Simple to use.
Powder has an indefinite shelf life.


Volume: Each powder packet makes 100 ml of solution (when mixed with distilled or deionized water)
Contents: 5 packets of 7.0 pH
Accuracy: +/- 0.02 pH at 25 degrees Celsius

Price includes delivery to UK Mainland

For 5 packets - £5.50 (£6.60 including vat and delivery)

Sorry, currently sold out