The Apera PH20 comes with calibration solutions included — but only as a small 50 ml starter quantity. That’s enough for two calibrations, after which you’ll need refills. This set therefore includes the 250 ml storage bottles as well: five times the amount per solution.
Included in the Set
- Apera PH20
- Apera pH calibration solution 4.01 (250 ml)
- Apera pH calibration solution 7.00 (250 ml)
- Apera 3M KCl electrode storage solution (250 ml)
Why order together
If you reorder the solutions individually later, you’ll pay shipping a second time. In the set, they travel with the device. Plus there’s the set price: the storage bottles are 15% cheaper here than individually, and the device price remains unchanged. You save €5.56 compared to buying separately.
Good to Know
If you use your device daily, calibrate about once a month, or at least before important measurement series. A 250 ml bottle is sufficient for about ten calibrations, depending on the vessel size.
