The Shearwater Peregrine vs Peregrine TX question comes up often, because the two dive computers look almost identical from the front. Both use the same large color screen, the same two-button layout and the same decompression algorithm. The differences sit inside: the Peregrine TX adds wireless air integration and a digital compass, which the original Peregrine does not have. This guide from the DiveCatalog team lays out what the two models share and where they differ, using Shearwater's published specifications.
Shearwater Peregrine vs Peregrine TX at a glance
Shearwater announced the original Peregrine in July 2020 as a recreational computer built on its Perdix-style color screen. In its launch announcement, Shearwater noted that the digital compass and air integration were removed to keep the design simple. The Peregrine TX followed in May 2024, and Shearwater describes it as the Peregrine's large screen and interface with air integration and a digital compass added back.
| Specification | Peregrine | Peregrine TX |
|---|---|---|
| Display | 2.2 in full-color LCD, 320 x 240 | 2.2 in full-color LCD, 320 x 240 |
| Algorithm | Bühlmann ZHL-16C with gradient factors | Bühlmann ZHL-16C with gradient factors |
| Depth rating | 120 m / 394 ft | 120 m / 394 ft |
| Dive modes | Air, Nitrox, 3 Gas Nitrox, Gauge | Air, Nitrox, 3 Gas Nitrox, Gauge, plus Avelo Mode as a paid unlock |
| Air integration | No | Yes, wireless, with optional Shearwater Swift transmitters |
| Gas time remaining (GTR) | No | Yes, with a paired transmitter |
| Digital compass | No | Yes, 3-axis tilt-compensated |
| Sidemount support | No | Yes, cylinder switch notifications and gas tracking |
| Battery | Rechargeable, up to about 30 hours per charge at medium brightness | Rechargeable, up to about 30 hours per charge at medium brightness |
| Charging | Wireless charging station with USB-C cable, included | Wireless charging station with USB-C cable, included |
| Log downloads | Bluetooth, Shearwater app | Bluetooth, Shearwater app |
Specifications are taken from Shearwater's product pages and launch announcements for each model. Firmware updates can change features over time, so Shearwater's own support pages are the final reference for the current version.
What the two models share
Most of what defines the Peregrine carries straight over to the TX. Both computers use a 2.2 inch full-color LCD that Shearwater says has an enhanced color range, and both let the diver customize which information appears on the main screen. Both are operated with two 316 stainless steel buttons rather than a touchscreen.
Under the screen, both run the Bühlmann ZHL-16C decompression algorithm with gradient factors, the same algorithm family Shearwater uses across its range. Both are depth rated to 120 meters (394 feet), and both are multi-gas computers that can carry up to three nitrox mixes in 3 Gas Nitrox mode. Shearwater also states that its computers do not lock the diver out for dive plan deviations, and that applies to both models.
Power and connectivity are the same too. Each uses an internal rechargeable battery rated by Shearwater for up to about 30 hours of diving per charge at medium brightness, charged on an included wireless charging pad with a USB-C cable. Dive logs download over Bluetooth to the Shearwater app, and firmware can be updated the same way.
What the Peregrine TX adds
Wireless air integration and gas time remaining
The headline difference is air integration. The Peregrine TX can receive tank pressure from a wireless transmitter mounted on the regulator first stage, so pressure shows on the computer screen alongside depth and time. Shearwater's Swift transmitter is the matching unit, and with a transmitter paired, the TX also calculates gas time remaining (GTR), an estimate of how long the current gas supply will last at the diver's present breathing rate. Transmitters are sold separately; DiveCatalog carries the Swift and Swift GPS in its dive computer transmitters collection.
The original Peregrine has no air integration, so it is used alongside a standard submersible pressure gauge.
Digital compass
The TX includes a 3-axis, tilt-compensated digital compass. Shearwater lists heading display and a reciprocal heading among its functions. The original Peregrine has no compass, so a separate compass is needed if one is wanted.
Sidemount support and Avelo Mode
Shearwater describes the Peregrine TX as sidemount ready, with cylinder switch notifications and gas tracking calculations. The TX is also on Shearwater's list of computers compatible with Avelo Mode, a paid unlock code for the Avelo diving system that works only with a paired Swift transmitter or Shearwater Jetpack. The original Peregrine is not on that list.
Models DiveCatalog carries
The original Peregrine is offered in Black as well as two Adventures Editions, Light and Dark. Shearwater states that the Adventures Editions differ only in color and coordinated accessories, with identical specifications.
Shearwater Peregrine Dive Computer
2.2 inch full-color LCD, Bühlmann ZHL-16C with gradient factors and a 120 m / 394 ft depth rating. Air, Nitrox, 3 Gas Nitrox and Gauge modes, with no air integration or compass.
The Peregrine TX listing below is for the computer alone; transmitters are sold separately.
Shearwater Peregrine TX Dive Computer
Same 2.2 inch color screen and 120 m / 394 ft rating as the Peregrine, plus wireless air integration with gas time remaining and a 3-axis tilt-compensated digital compass.
Both models sit alongside the rest of the range in the DiveCatalog dive computers collection.
Choosing between them
Put simply, the two computers share a screen, an algorithm, a depth rating and a battery system. The Peregrine TX adds air integration, gas time remaining, a digital compass, sidemount support and Avelo Mode compatibility. Questions about transmitter pairing, mounting or settings are best directed to Shearwater, and questions about how a computer fits into your diving and training are best taken to your certified instructor. For general questions about these products, the DiveCatalog team can be reached at support@divecatalog.com.
For a broader look at the features found across dive computers, see How to Choose a Dive Computer: Features That Matter, Air Integration, and What to Skip. For another air integration comparison, read Does the Suunto Nautic S Have Air Integration? Tank POD Compatibility Explained.
