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Welcome to Dive Gear Reviews, a comprehensive guide to scuba diving equipment. Scuba diving is an expensive pursuit, so looking up reviews for a particular article of equipment is a wise precaution before investing any hard-earned money in it. However, consumer reviews may or may not be written by an experienced diver, and magazine reviews could be suspect due to the advertising ties of the publication in question. Dive Gear Reviews provides cross-referenced reviews assembled by an expert, making it possible to see at a glance what multiple sources said about a particular piece of scuba equipment. If one magazine loved a scuba regulator or a dive computer, but the consumers hated it, that information will be found here.

Tusa RS680 Scuba Regulator Review

Written by Dive Gear Reviews Editor. Comments Off on Tusa RS680 Scuba Regulator Review Posted in: Between $251-$500, Scuba Regulators

The RS680 is the newest regulator from Tusa, and is basically the R-600 first stage that some are already familiar with from the RS670 combined with a new second stage, the S-80 (hence, RS680). Astute divers might remember that the Tusa RS670 suffered a recall for all regulators manufactured in Japan last year. However, no injuries or deaths were reported as a result of a fault with the RS670, and the RS680 isn’t drawing R-600s from that suspect pool of parts. Basically, the recall is water under the bridge and shouldn’t influence opinions regarding the RS680.

The R-600 first stage is a balanced diaphragm design and a compact, travel-worthy piece of gear that weighs in at only 630 grams (22 oz.). The unit has 2 HP and 4 LP ports (Scuba Diving misstated the RS680’s ports in its review), but the port placement is a bit awkward and some air-integrated transceivers might not work with the first stage unless an adapter is fitted. The first stage is compatible with Tusa’s DIN and environmental conversion kits.

The S-80 uses a new dual-exhaust system, reducing exhalation resistance, and has a breathing resistance control knob. The venturi lever is new, but the few owners who have commented on the RS680 thus far thought it was too small and hard to manipulate during a dive. It is possible that Tusa decided to emphasize a small, streamlined design over easy-to-use controls. The S-80 second stage has a moisture-capturing plate to help prevent “dry mouth.” In the lab, Tusa’s RS680 was more than up to meeting the needs of recreational diving, but struggled with more demanding breathing machine tests. Overall, the RS680 looks like a regulator with some solid virtues, but also some flaws.

Average Price: $480