HTi HT-A2 Pocket Thermal Imaging Camera Review 

 September 18, 2019

By  Randy Angwin

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Last updated on September 17, 2022

A thermal imaging camera is an incredibly useful piece of equipment that is a common find in toolboxes and equipment lockers around the world.

Packed with many features and functionalities, there’s often a hefty price tag attached to quality thermal imaging cameras. With prices often surpassing the thousand-dollar mark, many users are now on the hunt for budget friendly thermal imaging cameras - minus the bells and whistles - that simply get the job done.

Are you one of these people who are on the quest for a thermal imaging camera that ticks all the boxes without breaking the bank?

If you answered ‘yes’ to the above, you need look no further than the HTi HT-A2. 

About Dongguan Xintai Instrument Co., Ltd.

Established in June of 2009, Dongguan Xintai Instrument is located in Dongguan, GuangDong; and it is here that they manufacture instruments of every nature.

They manufacture all kinds of industry related products like IR thermometers, Anemometers, Humidity and Temperature Meters, Sound Level Meters, Carbon Monoxide Meters and even Microwave Leakage Detectors. All products are subjected to strict quality control and undergo a full inspection before shipping.

Dongguan Xintai Instruments pride themselves on handling every step of the manufacturing process - from conceptual design right through to mass production.

Today we’ll be discussing one of Dongguan Xintai Instruments’ bestselling products that is fast becoming the go-to budget thermal imaging camera: the HTi HT-A2. 

All about the HTi HT-A2

HTI HT-A2 menu

The HTi HT-A2 is a pocket-style thermal imaging camera that boasts an impressive list of features for a product found in this price range.

With features ranging from the storage of over 20,000 images to emissivity control, there’s a lot to mention about the HTi HT-A2. Today, we’ll be covering the basics.

Let’s start by taking a thorough look at the full list of product specifications and then we’ll move on to discussing some of the HTi HT-A2’s most impressive features in more detail. 

HTI HT-A2 packaging

Product Specifications of the HTi HT-A2

  • Display screen: 3.2″ full angle TFT display screen
  • Infrared image resolution: 320 x 240 
  • Visible image resolution: 640 x 480 (300,000 pixel) 
  • LCD resolution: 320 x 240 
  • FOV: 56° x 42°
  • Shortest focus length: 0.15m 
  • Thermal sensitivity: 0.07 ℃
  • Temperature measurement range: -20℃ to 300℃ 
  • Measurement accuracy: ±2% / ±2℃
  • Emissivity: Adjustable from 0.01 to 1.00
  • Frame rate of thermal images: 9Hz
  • Wavelength coverage: 8-14um
  • Focus mode: Fixed
  • Storage capacity: Built-in 3Gb
  • Connectivity: Micro USB 2.0
  • Power: Built-in rechargeable 1800 battery 
  • Operating time: 2 – 3 hours
  • Product dimensions (length x width x height): 140mm×80mm×28mm
  • Product weight: 208g
HTI HT-A2 packaging 2


What makes this product so popular is its compact, all in one, pocket size design for ease of use and transportation. Almost identical to the HTi HT19, the HTi HT-A2 is another crowd pleaser. On the back of the device you’ll note the visual camera, thermal camera and the LED light lined up in a neat, aesthetically pleasing row.

HTI HT-A2 rear view

What Information can be Found on the Display?

When you switch the HTi HT-A2 on, you’ll note that the 3.2” screen is home to quite a lot of information to ensure thorough thermal imaging takes place.

HTI HT-A2 thermal image quality

The information found on the display includes:

  • Central point temperature.
  • Maximum value and minimum value of field temperature.
  • Current emissivity.
  • Battery power.
  • Color code: used to mark the corresponding color to the relative temperature, from low to high, in the field of vision.
  • Cursor at highest temperature: used to identify the highest temperature position in the area of the screen. This cursor is red in color and will move along with the movements of the highest temperature. The value of the highest temperature is displayed at the bottom of the screen, in the left corner. 
  • Cursor at central point temperature: used to identify the central position in the area of the screen. The cursor is white in color and the value of the central temperature is displayed at the top of the screen, in the left corner. 
  • Cursor at lowest temperature: used to identify the lowest temperature position in the area of the screen. This cursor is red in color and will move along with the movements of the lowest temperature. The value of the lowest temperature is displayed in the center of the screen. 
  • Time.


Navigating the HTi HT-A2 is a simple, user-friendly process. To switch the device on, all you need to do is hold the power button down for three seconds. With simple to operate controls like menu, power, left, right, up, down and select you’ll get the hang of using the HTi HT-A2 in no time. On the side of the device you’ll find a button—this is the camera button that doubles as the on/off switch for the LED when you hold it in.

What Can the HTi HT-A2 be Used For?

By nature, thermal imaging cameras have many applications that span across various industries and the HTi HT-A2 is no different. 

From detecting the source of a fire, to picking up the heat signature of an animal you’re hunting or even making sure your garage door is properly sealed. Thermal imaging cameras are a handy tool that is a vital piece of equipment for activities like moisture detection, HVAC, electrical inspections or even home renovations

Water pipes

Water pipes

Water pipes

Water pipes

Battery life and Charging Options

The lithium ion battery lasts between 2 to 3 hours and is easily charged. Simply locate the rubber plug that covers the micro USB input that is found on the left side of the device and plug into a USB plug or portable power supply.

Image Storage

Due to the small size of the images that the camera takes, you can store over 20,000 images! Transferring these images is an uncomplicated process. Simply plug the included USB cord into your PC’s USB port and drag & drop the images you want to save.

Image Overlay

Because the resolution is so high you might not even need to use this image overlay feature, but it still needs to be mentioned because it is noteworthy by all means.

The Image Overlay feature makes it easy to comprehend the infrared images by aligning visible images and infrared images. This feature allows you to capture the visible image of every infrared image to properly display temperature distribution of the target. We did find out that the visual image and thermal image don't quite match which is visible on our test shot below.

Visual image overal

Thermal only

Emissivity Control

Emissivity is the measurement of an object’s ability to emit infrared energy, this emitted energy indicates the temperature of an object.

Coarse objects give off the most emissivity, so the HTi HT-A2’s default setting is set to that of a coarse object. It’s important to select the correct emissivity setting to ensure proper temperature measurement. 

The HTi HT-A2 features four object measurement modes for you to pick from:

  • Coarse object (0.95)
  • Semi-matte object (0.85)
  • Semi-shiny object (0.60)
  • Shiny object (0.30)


Dongguan Xintai Instruments offer a warranty on the HTi HT-A2 that is effective for a period of one year from the date of purchase. With this one-year warranty you can use your device with confidence and without worrying.


Final Thoughts

After reading all about the HTi HT-A2, I’m sure that you’ll agree that this nifty device is packed with features that would satisfy the needs of most users.

There are many thermal imaging cameras available on the market today but none that are quite as cost effective as the HTi HT-A2. 

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.

  • This realative expensive thermal camera HT-A2 (as well as the HT-A1) is not FW upgradeable at home. So you never will get any bugfix for it – to me that’s an absolute no-go these days!

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