How many samples should I use to perform a batch calibration?

Batch calibration data are created by sacrificing some samples/sensors for a multipoint calibration. The number of samples should be adapted to the size of the sensor batch.

You can find some suggestions here: Explaining Acceptance Quality Limit (AQL) for product inspection - Eurofins - Eurofins Scientific.
Alternatively, you can refer to ISO 2859-1 (Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection).

We recommend applying Special Sampling Level S2 and AQL 2.5.

For a batch size of 100 sensors this refers to 5 samples.