Cheapest low-frequency voltage logger?

Cheapest low-frequency voltage logger?

I want to install a dozen voltage logging devices in my system, so I'd like to minimize the per-unit cost. I don't need a wireless connection, I'm happy to pull an SD card out of the device once a week or month. I also don't need sampling measured in Hz; one sample per minute or even hour would suffice for my needs.

Is there an option on the market for less than $80 per device?

submitted by /u/sparr
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