The Element IQ-650 was TUSA’s entry-level puck computer, running the Bühlmann ZHL-16C/Pelagic Z+ algorithm common to that generation of Pelagic-built computers. TUSA’s site now points to the Element III as the current version, so treat this listing as the older model still available through some retailers.
TUSA
TUSA Element IQ-650
A simple single-button puck computer. TUSA's current lineup has since moved on to the Element III.
Manufacturer app only
Not supported by libdivecomputer. You're locked into the manufacturer's own app to get dive logs off this computer.
| Released | 2009 |
| Max depth rating | 99m |
| Algorithm | Bühlmann ZHL-16C / Pelagic Z+ |
| Air integration | none |
| Wireless | — |
| Display | 3-section LCD with N2/O2 loading bar graphs |
| Battery | user-replaceable |
| Digital compass | No |
| Gas types | air, nitrox |
| Gas switches | 1 |
| CCR capable | No |
"Gas switches" is how many different mixes this computer can be programmed to switch between mid-dive, mostly relevant for technical/staged-decompression diving. It doesn't tell you which gas types (air, nitrox, trimix) are supported. See Gas types and the product description above for that.