Notice: Please note if you choose Normal Mail (Non Registered Mail without tracking number) we are not responsible for lost  mail.

HIGHLY RECOMMEND buyer to choose Registered Mail with tracking number and delivery takes 2-3 working days  

Price  S$5.50 in package contents 4 sachets : (2 sachet pH4.00 + 2 sachet pH6.86)

- 2 sachet of pH buffer solutions, pH4 and pH 6.86
- Simple to use. Just add 250ml per powder packet
- Powder has an indefinite shelf life
- Easy 3-step procedure is written at the back of the packet
- Each pack volume: 250 ml
- Each powder packet/sachet makes 250ml of solution (when mixed with distilled or deionized water)
- Accuracy: ±0.01pH at 25°C