CAT S61 (S Series)
Graphics adapter
4096 MB 
5.2 inch 16:9, 1920 x 1080 pixel 424 PPI, Capacitive touchscreen, IPS, Corning Gorilla Glass 5, glossy: yes
64 GB eMMC Flash, 64 GB 
, 48 GB free
1 USB 2.0, Audio Connections: 3.5 mm, Card Reader: MicroSD up to 256 GB, NFC, Brightness Sensor, Sensors: Acceleration sensor, gyroscope, proximity sensor, compass, barometer, thermometer, hygrometer, air quality sensor (VOC), USB-C, infrared camera, laser distance measure
802.11 a/b/g/n/ac (a/b/g/n/ac), Bluetooth 5.0, GSM (850/​900/​1800/​1900), UMTS (850/​900/​1700/​1900/​2100), LTE (B1/​B2/​B3/​B5/​B7/​B8/​B19/​B20/​B26/​B28/​B38/​B39/​B40/​B41), LTE, GPS
height x width x depth (in mm): 13 x 163 x 78 ( = 0.51 x 6.42 x 3.07 in)
17.1 Wh, 4500 mAh Lithium-Ion, Quick charge
Operating System
Android 8.1 Oreo
Primary Camera: 16 MPix Phase comparison AF, dual-LED flash, Videos @ 2160 p and ​30 fps
Secondary Camera: 8 MPix
Additional features
Speakers: Mono speaker at the bottom edge, Keyboard: Virtual keyboard, Quick charger, USB cable, Measure, Air, App Toolbox, FLIR, 24 Months Warranty, Protected by IP68 & IP69K; MIL SPEC 810G, Temperature resistance: withstands temperature changes between -25 °C (-13 °F) and 55 °C (131 °F) for up to 24 hours; vibration resistance: Category 4; resistant to moisture and salt fog; LTE Cat. 13 600 Mbps (download) Cat. 12 150 Mbps (upload); SAR value: 0.416 W/kg (head), 1.594 W/kg (body), fanless, ruggedized
250 g ( = 8.82 oz / 0.55 pounds), Power Supply: 91 g ( = 3.21 oz / 0.2 pounds)
899 Euro



Average Score: 75.28% - good
Average of 11 scores (from 23 reviews)
price: 60%, performance: 67%, features: 63%, display: 83% mobility: 97%, workmanship: 88%, ergonomy: 79%, emissions: 94%

Reviews for the CAT S61

84.1% CAT S61 Smartphone Review | Notebookcheck
The robust CAT S61 puts all those who say that there are no innovations in the smartphone market to shame. However, with the built-in thermal-imaging camera, a laser distance measure, and the automatic measure of the indoor air quality, its most important features might be more useful for professional users.
50% CAT S61 review – Construct a better handset
Source: Htxt Africa English
There's really not much to see with the S61 aside from the laser measuring and FLIR camera. Both work decently but not nearly as well as bespoke gadgets for those purposes. What really kills this handset is its middling features and premium price. We know its a rugged phone so there are trade-offs but we feel this handset doesn't compel us to cough up the price of admission.
Single Review, online available, Long, Date: 10/09/2018
Rating: Total score: 50%
80% CAT S61
Source: Trusted Reviews English
The CAT S61 is the ultimate, money is no object, rugged phone. But it still isn’t perfect. Clearly aware it’s onto a winning format, Bullit has chosen not to rock the boat on the S60, refining rather than rethinking the design of the S61. Highlights include a more powerful thermal imaging sensor, laser measuring tool and ambient air sensor that will act as canary in a coal mine.
Single Review, online available, Very Long, Date: 08/08/2018
Rating: Total score: 80%
Cat S61 rugged smartphone
Source: Tech Smart English
There’s not much else to crit on the Cat S61. It’s a workhorse built for those for whom ‘light’ should not refer to neither their beer or smartphone. The Cat S61 is the best one in the range by far, pushing it from a mid-range muddler to a strong performer where you don’t need to sacrifice processing power nor screen quality.
Single Review, online available, Short, Date: 08/03/2018
CAT S61 Android smartphone review: Taking the smartphone as a tool to the next level
Source: English
The Cat S61 smartphone is not designed to compete with the Apple iPhone, OnePlus 6, Galaxy Note 8, or any other typical high end or mid-range smartphone. You should only consider buying the S61 if your company has a need for thermal imaging technology. If you just want a rugged smartphone with no need for thermal imaging, then take a look at the Cat S41 for $450.
Single Review, online available, Medium, Date: 07/30/2018
Cat S61 hands-on: See like the Predator
Source: Android Authority English
Overall, it’s great to see a phone fill a niche that isn’t being filled by many other manufacturers. For people that work in extreme conditions, this is a good option (or even if you’re just tough on your devices). It isn’t pretty and it will cost a whopping 899 Euros ($999 USD) when it launches in Q2, but this might be in the running for one of the best rugged phones out there.
Single Review, online available, Medium, Date: 03/01/2018

Foreign Reviews

CAT S61 Hat es überlebt?
Source: A1 Blog German DE→EN
Single Review, online available, Medium, Date: 10/05/2018
Outdoor-Smartphone voller Features
Source: Tech Stage German DE→EN
Single Review, online available, Long, Date: 08/09/2018
78% Handwerker-Handy mit coolen Features und langer Akkulaufzeit
Source: German DE→EN
Single Review, online available, Long, Date: 08/02/2018
Rating: Total score: 78% performance: 73% features: 73% display: 94% mobility: 94%
Dieses Smartphone misst bis 400 °C, Längen und Luftgüte
Source: Computerbase German DE→EN
Single Review, online available, Long, Date: 07/27/2018
70% Grobe Kelle statt feine Klinge
Source: Android Pit German DE→EN
Single Review, online available, Long, Date: 07/23/2018
Rating: Total score: 70%
Das unzerstörbare CAT S61
Source: A1 Blog German DE→EN
Single Review, online available, Long, Date: 07/20/2018
Grobe Kelle statt feine Klinge
Source: Android Pit German DE→EN
Single Review, online available, Medium, Date: 02/22/2018
Cat S61
Source: Golem German DE→EN
Single Review, online available, Very Short, Date: 02/22/2018
60% Cat S61 - Buurman & Buurman-smartphone
Source: Computer Totaal Dutch NL→EN
Single Review, online available, Short, Date: 09/13/2018
Rating: Total score: 60%
84% Test du Caterpillar Cat S61 : le smartphone tout-terrain qui a plus d'un tour dans son sac
Source: 01Net French FR→EN
Single Review, online available, Medium, Date: 08/01/2018
Rating: Total score: 84% performance: 80% mobility: 100%
CAT S61 - pancerny kociak Boba Budowniczego
Source: Komputerswiat Turkish PL→EN
Positive: Elegant design; great built quality; nice cameras; good hardware; high performance.
Single Review, online available, Long, Date: 06/29/2018
Kipróbáltuk: CAT S61, a hőkamerás tank visszatér
Source: HWSW HU→EN
Positive: Powerful hardware; high performance; very tough; decent cameras. Negative: High price.
Single Review, online available, Medium, Date: 08/03/2018
Smartphone Android hàng thửa giá 999 USD
Source: Zing VN→EN
Positive: Solid workmanship; powerful hardware; high performance; metal case; support waterproof and dust avoiding. Negative: High price.
Single Review, online available, Short, Date: 02/23/2018
82% Cat S61 [TEST]: Mobilen er din værktøjskasse
Source: Alt om Data DA→EN
Single Review, online available, Short, Date: 09/23/2018
Rating: Total score: 82% price: 60% performance: 70% display: 70% mobility: 100% workmanship: 90%
83% Test: CAT S61
Source: Lyd og Billede DA→EN
Single Review, online available, Short, Date: 07/03/2018
Rating: Total score: 83%
74% Cat S61 Supertåliga Cat S61 med värmekamera testad
Source: SV→EN
Single Review, online available, Medium, Date: 07/23/2018
Rating: Total score: 74%
83% Test: CAT S61
Source: Ljud och Bild SV→EN
Single Review, online available, Short, Date: 07/02/2018
Rating: Total score: 83%
TEST CAT S61 – Smartphone cu valoare adăugată, proiectat să reziste
Source: →EN
Positive: Long battery life; support waterproof; powerful hardware; high performance; excellent cameras.
Single Review, online available, Medium, Date: 10/07/2018


Model: The CAT S61 is a smartphone that features an advanced thermal imaging camera, a laser distance tool, and an air quality monitor. It is a great rugged phone that’s ideal for a variety of different professions. It is capable of serving engineers, plumbers, builders, farmers, the military, and other groups seeking a particular set of skills from their phones. The only downsides are performance issues and a fairly ridiculous price which will compromise its appeal to hobbyists. The Cat S61 has IP68 and IP69 dust and water resistance so it can handle most environments. It is also rated to handle environments from -25 to 55 degrees Celsius. This is a chunky tank of a phone, capable of surviving falls, bumps, and dunks without a case. On the casing, it has a thick, matte aluminium frame with a glossy edge contrasting with the black plastic, and a distinctive, angled protrusion at the top bears the Cat logo. The 5.2-inch display has three physical buttons below it for access to the back, home, and recent apps, enabling a user to navigate the Android interface even if their hands are wet or dirty. There’s a polycarbonate lip around the screen to prevent it from touching down if a user drops their Cat S61; it also comes with a screen protector already applied over the Gorilla Glass 5 display.

Screen quality is always one of the first areas to be sacrificed on rugged phones. This remains the case with the S61. The 5.2-inch screen offers a significant upgrade on the S60’s panel, but it still doesn’t match equivalently priced non-rugged phones. It’s close to half an inch (1.27 cm) larger than the S60’s 4.7-inch screen, plus the jump from 720p to FHD makes it significantly sharper. Holding the S61 next to the S60, the text is sharper and the screen is generally more pleasant to use. The screen temperature has also been improved. The screen has lost the cool, dull look that plagued the S61. Brightness levels are also better, although nowhere near mobile HDR levels. The hardware specifications feature the slower and older Snapdragon 660 instead, and 4 GB of RAM and 64 GB onboard storage, which places it just below flagship devices. Just to note that the S61 was never meant to compete against the latest smartphones with top specifications. The rest of the specification is fairly standard: 802.11ac Wi-Fi, Bluetooth 5.0, NFC, a 16-megapixel rear camera, 8-megapixel front camera, fast charging capabilities (via Qualcomm’s Quick Charge 3.0 technology) and a tiny 18 W power supply. The CAT S61 currently runs on Android Oreo. The company has also confirmed it will be upgraded to the newer version, Android Pie when it arrives later this year. Security updates have also been guaranteed for at least the next three years.

Hands-on article by Jagadisa Rajarathnam

Qualcomm Adreno 508: Integrated graphics card in the Snapdragon 630 SoC based on the Adreno 500 architecture. According to Qualcomm "up to 30% faster graphics rendering than previous designs".  Only some 3D games with very low demands are playable with these cards. » Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
630: Mid-range octa-core SoC with eight ARM Cortex-A53 cpu cores at up to 2.2 GHz, an Adreno 508 GPU, a LPDDR4-2666 memory controller and a X12 LTE (Cat 13/12, 300 / 150 MBit) modem. Manufactured in the modern 14nm process. » Further information can be found in our Comparison of Mobile Processsors.

This display is quite big for a smartphone but frequently used for smartphones.

Large display-sizes allow higher resolutions. So, details like letters are bigger. On the other hand, the power consumption is lower with small screen diagonals and the devices are smaller, more lightweight and cheaper.  

» To find out how fine a display is, see our DPI List.
0.25 kg:

This weight is typical for smartphones.


CAT, which can be easier found under CAT Phones in the web, gets seldom reviewed, does hardly have any market shares and achieves average ratings (as of 2016).

75.28%: This rating is not convincing. The laptop is evaluated below average, this is not really a recommendation for purchase.
» Further information can be found in our Notebook Purchase Guide.

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Nokia 7
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Devices with the same GPU

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Motorola Moto G6 Plus
Adreno 508, Snapdragon 630, 5.9", 0.167 kg
Sharp Aquos S3
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Adreno 508, Snapdragon 630, 6", 0.221 kg
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Stefan Hinum (Update: 2018-03-18)