Acme Tornado 636 vs Pieps Micro BT

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

Acme Tornado 636 is the lighter option — 163 g lighter than the Pieps Micro BT (93% less weight). If grams matter to you, that is the one to beat.

Spec	Acme Tornado 636	Pieps Micro BT
Weight	12 g · 0.012 kg · 0.03 lb	175 g · 0.175 kg · 0.39 lb
Brand	Acme	Pieps
Category	Safety	Safety

Acme Tornado 636

12 g

Loud pealess emergency whistle. Standard SAR equipment.

Full details →

Pieps Micro BT

175 g

Digital avalanche transceiver for winter mountain travel.

Full details →

Acme Tornado 636 vs Pieps Micro BT: which should you buy?

If saving weight is your priority, the Acme Tornado 636 wins — at 12 g it is 163 g (93%) lighter than the Pieps Micro BT (175 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.

More safety comparisons

Acme Tornado 636 vs Fox 40 Micro Whistle Acme Tornado 636 vs Black Diamond Oz Screwgate Carabiner Acme Tornado 636 vs Sawyer Squeeze Mini Water Filter Acme Tornado 636 vs Katadyn BeFree 1.0L Acme Tornado 636 vs Katadyn BeFree AC Water Filter Acme Tornado 636 vs Katadyn BeFree 1.0L Water Filter