Mares LED Tank Module V2.0 Transmitter

The LED Tank Module 2.0 is a tank pressure transmitter designed to seamlessly relay tank pressure data to the Mares Sirius computer. Once it has been associated with a dive computer, they remain permanently paired. The transmitter screws in to a standard 7/16-inch high-pressure (HP) port of the first stage regulator mounted on the tank to be monitored. The transmitter provides a secure radio connection to the dive computer and has a { 5 foot | 1.5 meter} range . The Mares Sirius can be paired with up to five (5) transmitters simultaneously in order to use several scuba tanks underwater.

The module has a color LED, and depending on the light color shown, in-water it allows your buddy to observe how much gas is in the tank. Upon pressurizing the tank module, if a pressure of {2600 psi | 180 bar} (full tank) or more is sensed, the LED will blink 10 times in GREEN color in 4-second intervals. For battery preservation, the LED turns off after the surface check and stays off until a pressure of {1450 psi | 100 bar} (half tank) is reached. At that point it blinks in YELLOW color once every 4 seconds until the tank pressure drops below {725 psi | 50 bar} (low tank) and then the LED blinks in RED color once every second.

The transmitter is Nitrox Ready and has a user replaceable, non-rechargeable size LS 14250 battery. The high pressure o-ring located at the base of the transmitter is a standard size AS568-012 and under normal circumstances the o-ring does not require routine replacement. The dive computer will display a low battery warning that indicates when the transmitter battery needs to be replaced. Like the Sirius dive computer, the V2 transmitter has a {492 fsw | 150 msw} maximum depth. Although the official Mares specifications reference the usual EN250 requirements for accuracy of mechanical pressure gauges, you can expect the ±5% full scale accuracy typical of digital gauges. For technical diving, Dive Gear Express recommends following the best practice of also including a standard analog SPG on the regulator as a backup.

In rare cases, the body of some first stage regulator designs will have hose ports oriented such there is not room to accept a wireless tank pressure transmitter without interfering with hose routing. The solution is to use a standoff adapter, or some divers prefer to use a short 6-inch HP hose pigtail (do not forget the required Air Spool) in place of the standoff.