FLUKE FLK-TIS75 Thermal Imager Review 

 July 7, 2017

By  Randy Angwin

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Last updated on September 17, 2022

Do you still get amazed by modern technology? Despite living in an era where innovation has transformed how society lives life, certain products still leaves us in awe. That’s the case with Fluke’s range of infrared cameras. In some applications using a thermal camera is like being able to see through walls; And not because you’re cast in a sci-fi movie.

We took the Fluke TiS75 for a test to see why the market is raving about this product. Did it perform as well as expected? 

Fluke - An Introduction:

fluke thermal cameras

It’s worth it to educate yourself about the Fluke company. When you understand the motivation behind products, you realize how many areas their products can be utilized in.

Fluke has been around since the 1950s and started manufacturing industrial testing equipment. What sets Fluke apart is that it never stopped innovating and always kept up with the latest tech trends, needs in society & changes in the market.

Based on this value it got involved in thermal imaging in recent years. The decades of work provided them with insight into the market and the needs of consumers & industries. With this technology the company designed a range of infrared cameras.

With the help of quality thermal imaging cameras users can detect heat spots in roofs, behind paneling and in many other areas as well as heat loss. This has both domestic and professional relevancy to help find water leaks, power surges and other potential problems in homes and commercial buildings.

The TiS75 is an excellent example of how Fluke used years of knowledge to design a practical tool that is very useful in commercial and residential applications. 

FLK-TIS75 Specifications:

The TiS75 weighs 1.7lb and its dimensions are 10.5”x 4”x 5.7”. Some important numbers you need to determine if it’s what you need, include:

  • Field of view: 35.7°x 26.8°
  • Resolution: 320x240
  • Spatial resolution: 2.0mRad
  • Distance to spot: 504:1
  • Screen size: 3.5”
  • Temperature range: -4°F - 1022°F
  • Visual Camera: 5MP
  • Frame rate: 9Hz/30Hz
  • Battery life: 4 hours
FLUKE FLK-TIS75 30HZ Thermal Imager with Fluke Connect & IR-Fusion Technology, 320 x 240 Resolution

Now, let’s get practical. Why should you add this to your maintenance gear?

Features of the FLK-TIS75:

The FLK-TiS75 is an upgrade over the lesser expensive Fluke TIS45 thermal camera. Both home owners and professionals will be able to use the features & they’re mostly user friendly. We also appreciate that it supports 18 languages in its menu, which makes it relevant globally. 

The TiS75 simply needs to be pointed at a spot or a wall where you suspect problems. The laser pointer confirms the exact area you’re focusing the camera at. The quality 5MP visual camera and the infrared camera work together to provide you with a clear, realistic image of the area. This shows you visual camera footage overlaid with temperature ranges. That’s Fluke’s unique IR-Fusion Autoblend technology; similar to FLIR's MSX technology.

FLUKE FLK-TIS75 30HZ Thermal Imager with Fluke Connect & IR-Fusion Technology, 320 x 240 Resolution

You’ll love how you can use the manual focus allows you to ensure clear images.

What do you do once you’ve located the areas of higher temperature or heat loss? If you use this in a professional context you can simply create a report, straight from the device and email it to yourself or a client. This saves time as you don't have to download the images via USB cable to your computer and then create the report. 

There’s even a PhotoNotes option so you can add digital images to your thermal feedback. This helps you remember vital information and give insightful feedback to a superior or client. 

Alternatively you can store the images on the unit thanks to the 4GB memory and additional 4GB SD card features. When it’s time to download the information you simply use Wi-Fi and Fluke also developed a Fluke Connect server to help you store your data in the cloud.  

Of course you don’t want to run out of power in the middle of a project. The 4 hour battery life is pretty impressive. If you do have to wait for a recharge, you’ll be back at work within 2 ½ hours. The LED display will show charge level which helps you plan ahead and gauge how much power is left for your next task. 

FLUKE FLK-TIS75 30HZ Thermal Imager with Fluke Connect & IR-Fusion Technology, 320 x 240 Resolution

This design is all about versatility as you can even pick the file format you want your images saved in. Options include BMP, GIF, JPG, TIFF and many more. 

Fluke took thermal imaging one step further by also incorporating video recording features. This means you can provide a record of your investigation, or use the TiS75 to monitor a certain area remotely, thanks to live streaming. 

All of this is managed from a relatively user friendly interface with multiple buttons below the screen. This makes it easy to operate, even with one hand if necessary. The ergonomic handle makes long working hours possible without too much fatigue. 

But where will you use this?


As shown, the TiS75 is an extremely practical device, but what’s important here is that it’s versatile. You can decide how you want to use it and utilize the relevant features, no matter in what application:

Private use:

Some of the features, such as reporting, may be unnecessary for home owners. However, the device is easy enough to use that home owners should consider adding this to their maintenance equipment. It can help them discover leaks, electrical problems and more. 

Professional use:

With this in your hand you’ll find it easy to provide feedback to clients or colleagues. The quality of the images is also of a high enough standard for professionals in various industries:

  • Property inspections
  • HVAC
  • Electrical work
  • Plumbing
  • Building contractors
FLUKE FLK-TIS75 30HZ Thermal Imager with Fluke Connect & IR-Fusion Technology, 320 x 240 Resolution


  • High resolution
  • Laser pointer
  • Easy reporting
  • Large storage space
  • Combines thermal imaging with camera image for clarity
  • Durable


  • A lanyard will make it easier to use on site
  • Too large to keep in most clothing pockets

Closing Thoughts:

Is it worth investing in? If you think of the money you save on maintenance when you can act pro-actively, you’ll wonder why you haven’t added this thermal camera to your tool box. This is truly on of Fluke’s winners, as its perfect for so many applications, allowing you to access exactly the features you need to get the job done.

The only downside we can see is the price as this aimed more towards the commercial market and may be more than typical home owners need.

About the author 

Randy Angwin

Randy Angwin holds a master of science degree from University of Florida. He is an expert in infrared and night vision technology. His knowledge helps us staying on top of the latest trends in the thermal industry. When not working, Randy likes to hunt and spend time with his two German shepherds.

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