The CAT S60 is a smartphone that can see in the dark (+video)

cat s60 thermal and visible image

The CAT S60 smartphone has two cameras, one regular one and one for thermal imaging, and an app that can combine images from the two. 

Credit: Peter Sayer/IDG News Service

This ruggedized smartphone is waterproof to 5 meters, and will go on sale around June

It can see through smoke, it can dive underwater, and it can run Android Marshmallow.

The CAT S60 is a 4G LTE smartphone with a 3,800 mAh battery. With its ruggedized case, designed to survive a drop onto concrete from head height, it semms like the special forces of smartphones.

The phone's two stand-out features, though, are its water resistance and its thermal camera.

There are plenty of smartphones with IP68 ratings that can take a dip in a pool and still run, but the CAT S60 is fully submersible to 5 meters -- as long as you remember to batten down the hatches first. It has two mechanical shutters to cover the earpiece and microphone, and if you forget to flip those closed first, water's going to find its way in once you go below 2 meters. Otherwise, you're good for up to an hour under water.

There's one other thing worth keeping closed: the trapdoor on the back covering slots for dual SIM cards and a microSD card.

"We put it on the back, not the side, because otherwise it's a structural weakness," said Tim Shepherd of Bullitt Group, the company that designs and manufactures CAT phones under license. Bullitt is unveiling the phone at Mobile World Congress in Barcelona this week. It also makes ruggedized phones for JCB, although those are feature phones, not smart phones.

The thermal camera module is made by FLIR, and uses the same Lepton image sensor as FLIR's add-on modules for iPhones and Android phones. It has a raw resolution of 80 by 60 infrared pixels, but with some clever processing of the image from the adjacent 13 megapixel visible light camera, this can be interpolated up to a 640-by-480-pixel thermal image. An app allows a readout of the approximate temperature with a tap on the screen.

"It's accurate to 2-3 degrees Fahrenheit," said FLIR's Bruce Cumming. "For home inspectors and insurance loss adjusters, it's a good enough technology," he said, but recommended that they get trained in basic thermography first.

The S60's other features include a 4.7-inch touchscreen display that can be used with wet fingers or gloves, a Qualcomm Snapdragon octa-core processor, and 3GB of RAM.

Bullit expects it to go on sale around June, priced about $599 (excluding sales tax) for an unlocked version.

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