The Nuvair Pro O2 Handheld Analyzer measures oxygen levels in mixed gases from 1% to 100% oxygen. It comes with a water- and impact-resistant case and is available in three power options: Wall plug-in, 9-volt or rechargeable lithium battery.

TUSA's FREDDOM HD has a wide field of vision and is made of soft silicone.

Flexible, Kevlar-reinforced rubber high-pressure hose for manometer, optionally in lengths of 0.15 - 1.20 m.

Excellent Suunto SK-8 compass, willing to work even at higher inclinations.