Milled from solid material and hard-anodised, impact-resistant glass, the OSTC Nano is very compact and lightweight, depth-rated to 120m, and easy to operate, even with thick gloves.
Heinrichs Weikamp OSTC Nano dive computer
The device uses the Bühlmann ZH-L16+GF decompression algorithm and allows up to five adjustable gases. It features a 2in (51mm) IPS LCD monitor with adjustable, continuous illumination, a 170° viewing angle and 320x240 pixel resolution. Features include two integrated sensor buttons, a combined pressure/temperature sensor, tilt-compensated 3D compass, customizable settings, Bluetooth 4.0 with easy readout and connection to a smartphone, and a rechargeable lithium-ion battery with up to 40 hours of runtime and 12-month stand-by, which is easily recharged in two hours via included USB-C cable. No account, cloud or app is required to use the unit with hwOS Sport firmware for recreational divers or the hwOS Tech firmware for technical divers, and it can be converted via paid upgrade to a full trimix computer. At 66x48x21mm and 130g, it comes with firmware, bungee, sturdy neoprene box and display protection film.
