Acme Tornado 636 vs Black Diamond Recon BT Beacon

Weight and specs compared for 2026 — and which one to choose.

Acme Tornado 636 is the lighter option — 188 g lighter than the Black Diamond Recon BT Beacon (94% less weight). If grams matter to you, that is the one to beat.

Spec	Acme Tornado 636	Black Diamond Recon BT Beacon
Weight	12 g · 0.012 kg · 0.03 lb	200 g · 0.200 kg · 0.44 lb
Brand	Acme	Black Diamond
Category	Safety	Safety

Acme Tornado 636

12 g

Loud pealess emergency whistle. Standard SAR equipment.

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Black Diamond Recon BT Beacon

200 g

Bluetooth-enabled avalanche beacon for backcountry travel.

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Acme Tornado 636 vs Black Diamond Recon BT Beacon: which should you buy?

If saving weight is your priority, the Acme Tornado 636 wins — at 12 g it is 188 g (94%) lighter than the Black Diamond Recon BT Beacon (200 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest safety page, or browse the full gear weight database.

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