FLIR TG165 Spot Building and Industrial Thermal Imagers

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FLIR TG165 IR Spot Thermal Camera - Thermometer with Thermal Image

Free Gift From Flir with Purchase - $99 or more


  • +/- 1.5% or 1.5°C Basic Accuracy
  • -25 to 380°C, -13 to 716°F Temperature Range
  • 24:1 Distance to Spot Ratio
  • 2 Year Product Warranty and 10 Year Thermal Imaging Detector Warranty (when registered within 60 days of purchase)

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Product Information

FLIR TG165 Spot Thermal Camera - Thermometer with Thermal Image

The FLIR TG165 is a new class of non-contact temperature measurement tool that we call an Imaging IR Thermometer. The TG165 blows away traditional single point spot temp guns and visual hybrids. Unlike old school radiometers that have you blindly stabbing away trying to find a heat anomaly component by component, the TG165 actually lets you see a true IR image of what’s cold and what’s hot so you quickly know where to point to get a good reading. That saves lots of time and speeds up troubleshooting. It also has two built-in laser pointers that define the size of the area you’re measuring so you can trust what you’re getting. It’s designed to detect high-temp situations often found on mechanical equipment, too. It’s a no-brainer to use, and handy and small enough to slip into a crowded tool bag. You don’t have to pay through the nose either. Priced under $500, it helps you equip everyone in the field and around the plant with the power of thermal.

FLIR TG165 Imaging IR Thermometer – How it Works

Thermal imaging is one of the most powerful technologies ever developed to enhance visual perception. The unaided human eye can only perceive a very narrow band of visible light along the electromagnetic spectrum, which also includes radio and microwaves, infrared and ultraviolet light, X-Rays, and gamma rays.

Thermal energy—or “heat”—resides within the infrared spectrum, which is invisible. However, a spot thermometer sensor is capable of converting thermal energy into a temperature measurement, and a thermal imaging detector converts thermal energy into an electronic thermal image that can be viewed on an LCD screen.

The TG165 utilizes both of these types of infrared technology, simultaneously. The spot thermometer emits a beam of infrared light that lands on an object and then bounces back. The thermometer determines the object’s apparent surface temperature based on how much thermal energy the object is emitting, reflecting, or transmitting.

The TG165’s thermal imager, on the other hand, includes a micro thermal camera that can passively scan an area and display images of hot and cold patterns on an LCD screen. Being able to “see” infrared radiation creates an entirely new level of awareness for professionals and consumers, alike. Users no longer have to guess where to take temperature readings. They can literally see hot and cold spots, making work more efficient and reliable.

The TG165’s IR thermometer has a Distance-to-Spot ratio of 24:1. In other words, from a distance of 24 inches (61 cm), the TG165 can measure the temperature of a one-inch spot (2.5 cm). If you double the distance to 48 inches (122 cm) the spot diameter will expand to two inches (5 cm), and so on.

The amount of thermal energy emitted by an object depends upon its temperature and how effi ciently it radiates thermal energy. This efficiency is called “emissivity.” Emissivity values range from 0.1 for very reflective material—such as shiny metal—to 1.00 for a pipe with a flat black finish. The TG165 has both adjustable and preset emissivity settings, and the TG165 user’s manual includes a list of common materials and their respective emissivity factors as a quick reference for users who are not trained in thermography.

See the Heat

The FLIR TG165 Imaging IR Thermometer lets you see heat patterns, reliably measure temperatures with the onboard spot meter, and store images and data. Ready to use right out of the box, the TG165 will quickly become your go-to troubleshooting tool. Easily find hot and cold spots that are invisible to the naked eye to help you investigate and solve problems without delay. FLIR’s exclusive wafer-formed Lepton thermal sensor takes you beyond the limitations of single spot IR thermometers to help you see the heat and know right where to measure it.

Find an Unseen World of Problems Ordinary Meters Miss

Bridging the gap between single spot IR thermometers and FLIR’s legendary infrared cameras, the TG165 gives you the advantage of thermal imaging to help you discover temperature issues you can’t see with typical spot radiometers. You’ll work more quickly and have confidence you won’t miss anything vital.

Equipped with FLIR’s exclusive Lepton® micro thermal camera, the TG165 helps you identify heat patterns, reliably measure temperature, and store images and data for reports. And with a spot ratio of 24 to 1, you can take accurate readings from safer distances. The TG165 is simple to operate, featuring intuitive menu icons and dual laser pointers. Built by the world leader in thermal technology, the durable TG165 will quickly become your “go to” temperature tool.

Key Benefits

  • See heat issues clearly
  • Measure temperature more accurately
  • Document your work with images
  • Trust the rugged durability
  • Target the right spot
  • Troubleshoot quickly
  • Stay safer and more aware
  • Fits every budget

Eliminates blind guesswork
FLIR’s innovative Lepton® IR imaging engine

  • Exclusive Patented Technology
  • First of it’s kind combination technology
  • Guidance system in the palm of your hands

Stay Safe
24:1 spot size ratio allows for safe distance measuring

  • Dual lasers visually mark target area
  • On screen crosshair pinpoints spot measurement
  • High temperature range from 13°F to 716°F(-25°C to 380°C)

Streamlines documentation
Saves images and measurements for reports

  • Direct download to computer
  • Included Micro SD card with Adapter
  • Save Delete and Review IR Images on screen

Typical Applications

  • Electrical
  • Building
  • HVAC
  • Automotive/Transportation
  • Facility Maintenance
  • And more...

Visual IR Thermometers by Application

FLIR infrared cameras make it easy to perform non-destructive inspections that isolate cold and warm air infiltration/exfiltration so necessary repairs and improvements can be made to tighten energy efficiency. FLIR thermal imagers can also instantly show temperature differences that verify what’s wet and what’s dry and are the IR inspection cameras preferred most by building experts for fast, reliable diagnosing of a full range of building applications, from energy audits and restoration to roofing and commissioning.

In addition to the most advanced infrared cameras, FLIR offers building diagnostics training for an even faster ROI. Take the Level I Certified Building Investigations class offered by the Infrared Training Center (ITC)or one of ITC’s many other certified IR courses. Learn the art and science of using an infrared camera to get the most out of your thermal imaging investment.

TG165_Air_Conditioning_Application TG165_Brakes_Application
TG165 Air Conditioning Application TG165 Brakes Application
TG165_Car_Application_close-up_view TG165_Car_Application_Wide_shot
TG165 Car Application close-up view TG165 Car Application Wide shot
TG165_Car_Application TG165_Electrical___Mechanical_Application
TG165 Car Application TG165 Electrical & Mechanical Application
TG165_Radiator_Cap_Application TG165_Radiator_Cap_Wide_Application
TG165 Radiator Car Application TG165 Radiator Car Wide Application
TG165_Transmission_Application TG165_Water_Heater_Application
TG165 Transmission Application TG165 Water Heater Application

Thermal imaging detects the infrared energy of any surface and produces a detailed image showing its temperature profile. Non-destructive and non-contact, the technology provides a safer, more cost-effective way to evaluate a building’s performance. It also has proven to be very effective and accurate tool for facility predictive maintenance (PdM) programs.

With thermal imager in hand, HVAC specialists and plumbing professionals get to see the heating and cooling issues in a whole new way. Since your profession is primarily about temperature control, why wouldn’t you use a tool that helps you visualize the problems that your customers can feel and are complaining about? You’ll be able to check air balance easier, locate air leaks and misrouted ductwork faster, and check for weatherization and other wasteful energy loss issues to confirm it’s not the furnace or AC that’s the culprit. Plus plumbers can use the tool to find clogs in drain pipes, locate hot and cold water lines in walls, and more.

From start to finish, FLIR infrared cameras can help you simplify your restoration and remediation jobs. Advanced features help you quickly scan large areas to assess what is restorable. An infrared camera helps you pinpoint water intrusion, find moisture beneath the surface, and document dryness with accuracy and confidence.

Easy Reporting - Busy restoration professionals can speed up surveys with the automated humidity alarms. Reporting is also simple since a FLIR camera includes software that supports templates, spell-check, and easy conversion of reports and images to PDF format for trouble-free emailing.


FLIR TG165 Imaging IR Thermometer Specifications
IR Temperature Measurement
Basic Accuracy +/- 1.5% or 1.5°C
Range -25 to 380°C, -13 to 716°F
Emissivity 4 Pre-Set Levels with Custom Adjustment, 0.1 to 0.99
Dist. to Spot Ratio (D:S) 24:1
Measurement Resolution 0.1 °C / °F
Response Time 150 Milliseconds
Spectral Response 8 to 14µm
Lasers Dual Diverging Lasers, Frames Temp Measurement Area
Thermal Imaging
Imaging Detector FLIR Lepton™ Microbolometer Focal Plane Array (FPA)
Shutter Integrated Automatic Shutter
Image Resolution (H x W) 4,800 Pixels (80 x 60)
Spectral Response 8 to 14µm
Field of View (H x W) 50° x 38.6°
Upper Scene Range 127°C, 260°F (400K)
Thermal Imaging Sensitivity 150mK
Frame Rate 9 Hz
Color Palettes 2 (Grey Scale, Hot Iron)
Saved Image Format Bitmap (BMP) Image with Temperature and Emissivity
General Specifications
Unit Size (H x W x D) 7.3 x 2.2 x 3.7 in (186 x 55 x 94 mm)
Display Type 2.0 in TFT LCD
Display Resolution (W x H) 38,720 Pixels (176 x 220)
Battery Rechargeable via Micro USB Lithium-ion Battery: 3.7V, 2600mAh
Auto Power Off Yes, Adjustable with Disable
Battery Life Hours Typical Use: Five 8-Hr Work Days; Continuous Use: 8 Hrs
Certifications CE / CB / FCC / FDA
Memory 8Gb Micro SD Card
Operating Temperature -10 to 45°C, 14 to 113°F
Drop Test Designed for 2 Meter, 6.5 Feet
Tripod Mount 1/4 in - 20 on Handle Bottom
Warranty 2 Years Product, and 10 Years Thermal Imaging Detector*
Includes Lanyard, USB Cable, International Charger (US, UK, EU, AU, CN) 8 Gb Micro SD Card, Technical Documentation