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#194695
I have two of these boards, one of which takes c. 3 ms to produce a reading and another which takes c. 80ms. I have tried alternating the Arduino pins for receiving the readings and also alternating the sensors connected to the boards but the difference persists. This suggests to me that the difference is due to the boards. These were purchased as a pair and look identical.

The RATE contacts are as supplied, namely open.

Any ideas why there is something like a factor 30 difference in read times?

The board has B+ & B- marked on the underside - what does this signify?

Thanks.