#1: Buy an infrared camera with the highest detector resolution/image quality that your budget allows.
Most infrared cameras have fewer pixels than visiblelight cameras, so pay close attention to detector resolution. Higher resolution infrared cameras can measure smaller targets from farther away and create sharper thermal images, both of which add up to more precise and reliable measurements. Also be aware of the difference between detector and display resolution. Some manufacturers will boast about a high resolution LCD and hide their low resolution detector when it’s the detector resolution that matters most. For instance, LCD resolution may spec at 640 × 480, capable of displaying 307,200 pixels of image content. But if the IR detector pixel resolution is only 160 × 120 (19,200) pixels, then the greater display resolution accomplishes absolutely nothing because the quality of the thermal image and its measurement data are always determined by the detector resolution. Higher resolution thermal imaging not only provides more accurate quantitative results, it can be very effective in showing findings in finer detail to customers, supervisors, repair crews, and insurance companies which can help move along the decision-making process for improvements and repairs. Superior IR image quality is also valuable for generating clearer reports and for marketing your services.
#2: Need to present findings to others? Find a system with a built-in visible-light camera outfitted with an illuminator lamp and a laser pointer.
There’s no need to carry a separate piece of equipment to take photos when many affordable IR cameras now include a built-in digital camera that simultaneously captures visible light and thermal images. Digital photos that correspond to your IR images will help you further document a problem and communicate its precise location to decision-makers. So, if your customer or supervisor needs to see a comprehensive report, you’ll definitely want a thermal imaging camera with this feature. And be sure it includes an onboard lamp that doubles as a flashlight to illuminate darker areas. Built-in laser pointers are also invaluable, especially for isolating the location of a target surrounded by similar-looking components, such as breakers, or for pinpointing problematic energized electrical equipment where you need to keep your distance. Laser markers show up clearly on visible light pictures to provide a reliable reference. They’re also indicated on IR images as well as the thermal camera’s display so you’ll be confident you’ve captured all the necessary information.
#3: Select a camera that delivers accurate and repeatable results.
Infrared cameras don’t just let you see differences in heat, they let you measure those differences, which means the accuracy and consistency of the measurements is a very important factor when determining the value of a camera. For best results, look for a thermal imager that meets or exceeds ± 2% (or 3.6°F) accuracy. All FLIR cameras maintain that minimum standard, made possible by the company’s ability to manufacture its own thermal imaging detectors. But that’s not the only criteria. In order to produce correct and repeatable results, your thermal imager should include in-camera tools for entering both “emissivity” and “reflected temperature” values. An infrared camera that gives you an easy way to input and adjust both of those parameters will produce the accurate temperature measurements you need in the field to make the best call. Other helpful diagnostics to consider are multiple moveable spots and area boxes for isolating and annotating temperature measurements that can be saved as radiometric data and incorporated into findings for reports. As you become more experienced with your infrared camera, these features will become more meaningful. But before you proceed with your buying decision, find out whether the thermal imager you like offers these capabilities.
#4: Look for an IR camera that stores and outputs standard file formats that are broadly supported.
Many infrared cameras store images in a proprietary format that can only be read and analyzed with specialized software. Others have an optional JPEG storage capability that lacks temperature information. FLIR, on the other hand, has the distinction of offering a standard JPEG with full temperature analysis embedded. This allows you to e-mail IR images to your customers or colleagues without losing that vital information. Radiometric JPEGs can also be imported from WiFi compatible cameras to select mobile devices using apps that provide further image editing, analysis, and sharing. After all, you shouldn’t have to waste time converting images. Request a demo from the infrared camera manufacturer and have them show you how the camera you’re considering will output JPEGs without a bunch of extra steps. Also, look for infrared cameras that allow you to stream MPEG 4 video via USB to computers and monitors. This is especially useful for capturing dynamic thermal activity where heating and cooling occurs rapidly and for recording motorized equipment or processes in motion. Some cameras feature composite video out for cabling to digital recorders while others include HDMI outputs. And new mobile applications have also been developed that allow streaming video over Wi-Fi. All these capabilities will help you share findings more effectively and enhance your infrared inspections and reports.
#5: Consider the added value of an IR camera that links to Bluetooth-enabled T&M meters for assessing electrical load and moisture levels.
New test and measurement tools like FLIR MeterLink products now allow certain thermal cameras to measure more than temperature to fully quantify the severity of moisture damage and electrical issues. These moisture and clamp meters wirelessly transmit vital diagnostic data such as humidity, amperage, voltage, and resistance directly to the camera. The data is annotated automatically to the thermal image and embedded in the radiometric JPEG to add support to findings. This provides extremely valuable information to help you determine the urgency of a problem and decide on the best solution.
#6: New Wi-Fi apps for mobile devices help streamline the sharing of thermal images and data; select a camera compatible with this leading technology.
It’s now possible to connect FLIR E-Series and T-Series cameras via Wi-Fi to smartphones and tablets. The unique FLIR Tools Mobile app lets users import IR images to the mobile device for portable analysis, report generation, and sharing. The advantage of being able to send thermal images and IR inspection reports wirelessly from one part of a facility to another or by email from the field is huge when time is of the essence. The app also allows live streaming video for customers and co-workers to view inspections from a safe, convenient distance. FLIR Tools Mobile also lets users take remote control of many major T-Series camera functions like focus, image level and span adjustments, adding temperature measurement tools. This comes in handy when it’s necessary to set the camera up on a tripod for monitoring equipment over time, for example.
#7: Make sure you get a camera with the ergonomic features that make your job as easy as possible to match the way you like to work.
The camera’s weight can be a significant concern if you’ll be using it frequently or for extended periods of time. A lighter thermal camera will decrease strain on your shoulder and back during long inspections. A wide selection of compact, light point-and-shoot thermal cameras are available at surprisingly affordable prices and fit nicely into tool boxes and utility belts and pouches. Some models like the FLIR T-Series have lens systems that tilt along a 120 degree axis allowing users to keep the viewing screen comfortably in front of them while rotating the optical block straight up or down to scan hard-toreach targets – perfect for a day full of overhead bus duct inspections, looking behind motors, under work stations, and aiming from other challenging angles. Another important thing to consider is the camera’s interactive controls. Does it have dedicated buttons, directaccess menus, both? A few extra simple buttons that are intuitively positioned can actually make the camera easier to use as opposed to relying on one button to step through menu options. Some cameras offer integrated touch screens as another advantageous way to access functions and features, including text and sketch notations. And make sure your camera is outfitted with at least two batteries (Lithium ion or better) that can be quickly and easily switched out in the field so you can keep working efficiently.
#8: MSX Thermal Image Enhancement and Picture-in-Picture (P-i-P) will allow you to combine thermal and visible-light images for generating reports that are easier to understand.
MSX® instantaneously adds visible spectrum details like numbers, labels, signage, and texture to the thermal image without obscuring or diluting the infrared scene. This onboard, real-time FLIR feature makes it much easier to immediately recognize where the heat issue is. P-i-P is another onboard mode that can be used for clearer documentation, allowing thermographers to inset a thermal image over its corresponding visible-light photo. Both choices help better-communicate the location of a problem to customers, colleagues, and repair crews.
#9: Not all reporting software products are created equal: Be sure to try out the product first to find the one that’s right for you.
Reporting is an indispensable feature in an infrared program or business. Clients, from individual home owners to large corporations, require documentation of your findings. Thermal image and report data can be a key element in a wide range of applications: energy audits, electrical inspections, gas detection surveys, building envelope analyses, and predictive maintenance programs. They’re often used to initiate insurance claims and substantiate restoration repairs. Today, most infrared cameras come with free software that allows you to perform basic image analysis and to create simple reports. Advanced software for more in-depth analysis and customizable reports is also available, allowing you to take full advantage of your camera’s capabilities and features. FLIR Tools+, for example, includes the ability to create panoramic radiometric JPEGs in horizontal or vertical orientation by stitching overlapping images that have been captured of a scene. Some FLIR thermal imagers allow the generation of instant reports right in the camera and/or using an app on mobile devices connected to Wi-Fi enabled cameras. IR analysis software can perform a wide range of tasks from simple spot measurements to custom radiometric calibrations. FLIR and third party providers also offer software packages designed for a range of specific applications – from building inspection to advanced research and development. Investigate these tailored software programs to see which may make the most sense for your business.
#10: Choose a thermal imager with a wide temperature range so you can measure ambient and high-temperature spots in the same image.
A camera’s temperature range and sensitivity are important considerations, too. The range tells you what the minimum and maximum temperatures are that the camera can measure (-4°F to 2,192°F is a typical example). Select an IR camera with a temperature range broad enough to capture all of the temperatures of the objects or scenes you typically encounter. Sensitivity shows you the smallest temperature difference between two objects that the camera can discern (0.045°C, for example). The more sensitive the detector, the subtler the details you’ll be able to see, which can be especially helpful when inspecting for moisture intrusion and other heat issues with minute temperature variations.
#11: Look for cameras with a comprehensive, extended warranty program to protect your investment for the long haul.
Reputable infrared camera manufacturers want to make sure your thermal imager is going to serve you well for many years. That’s why some offer extended warranties. Programs like FLIR’s 2-5-10 warranty, for example, go a step further offering two years of coverage on parts and labor, five on its field-replaceable batteries, and ten on the IR detector. Whatever camera you choose to go with, just be sure it comes with a solid warranty that will give you peace of mind.
#12: Make sure your investment in an infrared camera is backed by a strong manufacturer who will provide ongoing technical support and training.
The quality of customer service and the depth of technical support available should be integral to your decision on which infrared camera to purchase. Not only is FLIR the world’s leading manufacturer of infrared cameras for commercial applications, it also founded the ITC, the world’s largest infrared training center. Make the most of your investment, advance your career, and enhance your value to your organization with an accredited certification. Professional photographers get extensive training and it shows in their work. The same is true for your craft as a thermographer, and ITC can help. An Infrared Training Center certification is written proof of your expertise in operating your camera and interpreting the thermal information it provides. Come to classes at our training center, locally at one of our regional classes, or in your facility with our on-site service. And be sure to take advantage of online training, too.
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