I'm always chasing better tools and more data. You've done both here. I like it.
The bubbles are harmless but assuming you have a vacuum pump to evacuate the systems you're working on you could build a small chamber to vacuum de-gas the epoxy.
Perhaps use a few large steel pipe fittings or a small pressure cooker.
Place the potted sensors upright, inside the pressure cooker while the epoxy is liquid and pull a vacuum. Let it stand for 10 or 20 minutes so the bubbles can work their way up and out.
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