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Milwaukee M10004B pH 4.01 Calibration Solution

SKU: 9139-M10004B~pk

SKU: 9139-M10004B~pk

This product may be backordered. General ETA is 10-14 business days for delivery. Please feel free to contact us: or 1-800-535-3751 to confirm stock / lead time. We appreciate your business!

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Milwaukee M10004B pH 4.01 Calibration Solution Sachets (25)

The M10004B is a lab grade pH 4.01 calibration solution.  It is certified to meet the standard to an accuracy of ±0.01 pH and removes the inaccuracies involved with mixing from powder.

Sachet packaging means that there is fresh solution every time, which is ideal for infrequent or field use. There is no risk of using an expired calibration solution. 


  • pH 4.01 Calibration Buffer Solution - 20 mL (box of 25)
  • Important for the correct use of electrodes and for obtaining the most accurate and reproducible readings
  • Sealed against light and air
  • Ideal for on-the-spot calibration
  • Simply open, insert the tester or electrode into the sachet, and calibrate
  • Formulated with a 5-year expiry
  • Colour-coded for easy identification


  • Accuracy Standard: ±0.01 pH
  • Value:  4.01 pH @25°C 
  • Sachet Size: 20 mL
  • Quantity: 25
  • Certificate of Analysis: No