FLIR Thermal Imaging Cameras and Systems

Selecting a thermal camera for industrial inspection

Camera selection starts by determining target assets, viewing distance and operating conditions.

For regular routine maintenance of electrical panels, motor control centers and pump bearings, a handheld pistol-grip imager with 320x240 detector resolution and a standard wide lens is sufficient.

For high-voltage distribution lines, outdoor substations and pipe insulation on pipe racks, the professional FLIR T-Series is recommended. The 180-degree rotating optical head enables inspecting overhead components without straining the technician neck or arms during lengthy inspections.

For continuous automated thermal monitoring of manufacturing processes or waste storage pits, fixed-mount A-Series cameras or compact AX8 sensors are preferred. They mount permanently, interface directly to industrial PLC networks and generate automated alarms without manual intervention.

Temperature range and thermal sensitivity NETD

The temperature range defines the thermal limits of reliable measurement.

While standard building diagnostics and low-voltage electrical work require minus 20 to plus 120 degrees Celsius, metallurgy, foundries and kilns require high-temperature calibrations up to 1500 or 2000 degrees Celsius.

Thermal sensitivity, expressed as Noise Equivalent Temperature Difference or NETD in millikelvins, determines the smallest temperature contrast the detector resolves.

A sensor with 30 millikelvin sensitivity reveals subtle insulation thinning, moisture ingress and early-stage bearing friction.

Accurate thermal imaging relies on setting the correct surface emissivity and compensating for reflected background radiation. FLIR cameras permit entering emissivity directly on the touchscreen or adjusting radiometric values later within analysis reporting software.

Detector resolution and spatial resolution IFOV

Physical detector resolution determines the total number of temperature measurement points on the thermal image. An entry-level 320x240 detector provides 76800 measurement pixels, whereas the flagship T1020 HD sensor provides 786432 pixels for superior image sharpness.

Spatial resolution, designated as Instantaneous Field of View or IFOV, represents the spatial area captured by a single pixel from a given distance. Lower IFOV values, measured in milliradians, enable inspectors to measure smaller electrical terminals accurately from greater distances.

If a hot spot is smaller than the measurement spot size, surrounding background temperatures blend into the pixel, underestimating actual defect temperature.

Advanced algorithms such as FLIR UltraMax combine multiple frames to double effective thermal resolution and sharpen temperature gradients.

Interchangeable optics and working distance

Interchangeable infrared lenses adapt a thermal imager to diverse plant scenarios. A 42-degree wide-angle lens captures an entire switchgear panel inside crowded electrical rooms where the operator cannot stand back safely.

A 14-degree telephoto lens magnifies distant overhead lines, transformers and chimney stacks, reducing IFOV so inspectors can verify busbar joint temperatures without de-energizing circuits or hiring aerial bucket trucks.

FLIR AutoCal lenses incorporate onboard memory that registers lens calibration data directly into the camera body. Interchangeable lenses can be transferred among compatible cameras of the same platform without returning the camera body to the factory for recalibration.

Surface emissivity, reflected temperature and measurement precision

Radiometric accuracy depends fundamentally on entering the correct surface emissivity into the thermal camera. 15, distorting temperature readings.

Reflected apparent temperature settings compensate for thermal radiation originating from nearby hot equipment, steam pipes, direct sunlight or radiant heaters. FLIR camera firmware calculates and isolates background thermal reflections from true target emission.

Integrated material lookup tables within FLIR operating software enable field technicians to select surface materials directly on the touchscreen prior to inspection, preventing dangerous underestimations when evaluating high-voltage busbars and bolted lugs.

All radiometric JPEG images captured by FLIR cameras retain complete raw temperature values for every individual pixel. If environmental parameters shift during an inspection, thermal analysts can readjust emissivity and distance retroactively inside desktop software.

To verify measurement stability over extended operating cycles, FLIR incorporates internal shutter calibration mechanisms that periodically update non-uniformity correction offsets, ensuring detector drift does not compromise diagnostic precision.

Supply scope, accessories and spare parts

When sourcing thermal equipment, clarify whether the requirement is for a complete turnkey kit, spare replacement batteries, dedicated bench charging stations or industrial protective accessories.

Battery packs vary between camera models. Sourcing the correct rechargeable Li-ion battery requires matching the exact camera family code, ensuring seamless docking, proper charging contacts and safe temperature regulation.

For fixed automation installations, verify power over Ethernet injectors, rugged M12 cabling, mounting brackets and environmental enclosures. Providing your engineering environment specifications ensures the delivered kit matches factory installation criteria.

Information required for quotation and procurement

To prepare an accurate commercial quotation, provide the target FLIR model designation or a description of your monitoring project: equipment under test, target distance, ambient temperatures and measurement ranges.

When ordering spare parts, lenses or replacement accessories, send the serial number from the camera nameplate inside the battery compartment. This ensures complete optical, hardware and software compatibility.

Specify desired delivery location, destination port, project schedule and necessary trade documentation. Equipment is shipped with comprehensive export documentation, protective industrial packing and tracking.