What instruments can be used to detect diabetes without blood draw?

Patient's question:

Main symptoms: Onset time of type 2 diabetes: 2005
Laboratory test results: 14.71

Doctor's answer:

There are instruments available for blood glucose testing using peripheral blood. For those who have already been diagnosed with diabetes, it is best to have one prepared, which costs only two or three hundred yuan, not that expensive. However, this instrument is less accurate than the large biochemical instruments in hospitals, so it is not used for diagnosing diabetes, but only for home monitoring.