Digital PH Meter Buffer Powder

All PH meters has to be re-calibrated in the following conditions:

1. Long period in a status of inactivity, such as 6 months
2. Very frequent usage
3. Testing accuracy is required
4. The Cal (calibration) button was pressed and electrode exposed to the air for a long time

Chemistry:

Three types of PH tester buffer powder are available: 

• PH 4.01@25°C, KHC8H4O4
• PH 6.86@25°C, Na2HPO4
• PH 9.18@25°C, Na2B4O7 - 10H2O

Importance:

1. Calibrate the tester with PH 6.86 buffer powder firstly, then the PH 4.01 or PH 9.18 ones.
2. Should the sample to be tested be acidic, the tester can be calibrated with buffer powder of PH 4.01 and 6.86, while it's alkaline, PH 6.86 and 9.18 ones can be used for calibration. Calibration with these three types of buffer powder is recommended if the tester will be used to test the PH of acid and alkaline.

Minimum purchase of 5 sets is required for this price.

Please visit OUR SELLING LIST for the buffer powder of set PH4.01 and 6.86 or PH9.18 and 6.86, or to purchase PH meters, "Add to cart" makes these all purchase in one order without additional shipping cost. These combinations are also available in Optional Purchase while checking out if one set is needed.

Seller's 3 Items Free Delivery  Promotion 

Any orders of any 3 items or more by "ADD TO CART", 1 item taking 3 or more quantities or items for minimum purchase quantities multiple by 3 or more are qualified for our free shipping service, optional purchase in the item is not counted:

1. While checking out in Shipping, select "Collect from Beyers Park, Boksburg".

2. Write in "Optional note to seller" (just below shipping options) with your delivery address, PAXI code (pepstore you want to collect), or PUDO locker name and address you want to collect. Message can also be sent after checking out in your order page.

3. Buyer may still use BOBgo, the system courier service, but our free shipping offer is regarded being given up and not exchanged for cash.

4. No actual collection will be done from seller's address. It's seller's cost to resend if lost.