Get tank pressure and battery remaining sent to paired compatible Descent dive computers that will then also compute gas time remaining and gas consumption rate. Monitor up to five (5) transmitters via SubWave™ sonar technology so you can dive with multiple tanks or monitor transmitters of other divers in your group when they are within {33 feet | 10 meters}. The T1 can be mounted directly on to the standard HP port of a SCUBA first stage or with the addition of the included swivel adapter (aka "air spool") it can be installed on the end of a high-pressure SCUBA hose. Often called "air integration", the T1 tank pod is currently only supported by the Garmin Mk2i model dive computer. The T1 tank pod is NOT supported by the Mk1, Mk2 (without the 'i'), Mk2s, or G1 models; nor is it compatible with any other brand of dive computer.

• Transmission range (surface via ANT, underwater via SubWave): Up to {33 feet | 10 meters}
• Depth rating: {330 fsw | 100 msw}
• Gas Pressure rating: {4351 psi | 300 bar}
• Physical Dimensions: {3.33 x 1.44 x 1.44 in | 84.50 x 36.52 x 36.52 mm }
• Battery: Up to 100 hours, using user changeable and widely available 3V CR123A lithium
• Thread type: 7/16-inch UNF (standard HP fitting used in SCUBA)
• Surface operating temperature: From -20 to 60°C (from -4 to 140°F)
• Underwater operating temperature: From 0 to 40°C (from 32 to 104°F)

What's in the box: Garmin Descent T1 tTank pod (aka tank pressure transmitter) with installed CR123A battery, flow restrictor, swivel adapter (aka 'air spool') for use with HP hoses, and quick start user guide.

The Descent T1 Transmitter should always be installed using either a flow restrictor or an air spool, both included with this kit. Which one is used depends on the method of installation. The flow restrictor should be installed on a Descent T1 when it is attached directly to the high pressure port on a first stage regulator. When the T1 is attached to a high pressure hose, the air spool should be used. Using the transmitter without either the flow restrictor or air spool could result in serious injury or death from an air pressurization failure. Refer to the Descent T1 Manual for more details.

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 HP hose in place of the standoff. All high pressure hoses use an 'air spool' with two tiny o-rings to mate the swivel connector on the hose to the fitting, and the T1 package includes a special air spool for use with standard HP hoses. The design of the T1 tank pod is such that it's use with a standard HP hose requires the special air spool included with the transmitter package.

The T1 communicates underwater with the MK2i using an audible sonar signal, meaning the T1 emits a half second "chirp" every 4 seconds. Garmin says the sound is normal, and the volume can be lowered by reducing the power setting of the T1 and in some cases by repositioning the T1. Most divers (especially those that wear a hood) don't notice the sound or find it indistinguishable from background noise, but some divers do report finding thsousound of the T1 transmitter to be annoying.

Not available to ship outside the United Not available to ship outside of the United States.