Hti HT-301 thermal camera | Our opinion on it. (2022)

The Hti HT-301 is a thermal camera that attaches to your Android smartphone. It is more expensive than any smartphone thermal imager that Flir and Seek Thermal have ever built. At the same time, it provides the best value pixel for pixel. Why? Find out in our Hti HT-301 review.

PROS: Very high IR resolution, great sensitivity and temperature range, manual focus, video recording, photo capture with thermal data.

CONS: The app doesn’t work very well, it’s better you use the ThermViewer 3rd party app.

(Video) Thermal camera allows to see you can't see. "Hti HT-301" Cheap and High Resolution (384x288 25fps).

Hti HT-301 thermal camera | Our opinion on it. (1)

ProductTypeResolutionBattery capacityWaterproofLCD screenPrice

Hti HT-301

Hti HT-301 thermal camera | Our opinion on it. (2)

Smartphone384 x 288Uses Phone BatteryNoUses Smartphone screenClick for more info

Hti HT-301 Specifications

TypeSmartphone
Resolution384 x 288
Pixels110592 pixels
ConnectivityUSB-C or Micro USB
Temperature range-4°F to 752°F (-20 °C to +400 °C)
Accuracy+/- 3 ° C
Thermal sensitivity0.06°C
Distance
Storage TypeSmartphone
Battery capacityUses Phone Battery
Dimensions1.9 x 1.4 x 1.1 in
LCD screenUses Smartphone screen
Refresh rate25Hz
ApplicationsHVAC, Electrical, Animal Hunting, Roofing, Electrical Inspection, Automotive diagnostics
View Angle32° x 24°
FeaturesWaterproof, Dustproof, Manual Focus, Visual Camera

Hti HT-301 – Specs & Review

The Hti Xintai HT-301 is one of the only alternatives to the Flir One and the Seek Thermal Compact cameras as mobile thermal imager. It comes with a USB-C connector and instead of selling different versions for different connectors, they simply chose to add in a USB Type-C to micro USB adapter in the package. Clever.

Because the USB-C adapter is completely reversible, you don’t have to worry about the micro USB port orientation on your phone. The idea was to avoid the camera only fitting the USB port pointing towards you as a selfie camera and they avoided this scenario very cleverly.

(Video) HTI-H8 vs HT-301 Thermal Imager Showdown

Another interesting feature is that the lens is completely detachable.

Now HTI being a company from China, you would expect that this would be a low-cost version of the Flir or the Seek. Well not really because the price for this device is almost double what you would pay for the other two.

Let’s dive a little deeper in our Hti HT-301 review and have a look at the app, features and adjustments.

First of all, the Hti Image app needs work. It works but it also crashes. It is a stereotype that chinese manufacturers focus too much on hardware and too little on software but on this camera it turns out to be true. However, you can also use a 3rd party app that is compatible with the HT-301 called ThermViewer which works better and has more features.

On the main screen you will see the thermal image together with a center spot thermal measurement together with the coldest and warmest spots in the image.

The ThermViewer app allows you to switch between a few color palettes like Rainbow, Night Vision, Enhanced (uses some kind of image enhancement algorithm), White hot, Black Hot, Iron, Ironbow, Red hot, Emboss and Find Edges. Enhanced mode is a great color scheme to spot details.

You can adjust things like the ambient temperature, humidity, emissivity and distance to the object you are measuring for a better reading as well as the temperature unit of measurement between Celsius and Fahrenheit.

(Video) HTI 301 Review

Hti HT-301 – Thermal imaging quality

One of the things that will pop when you are reading the device’s specs is the IR resolution: it is 384 x 288 pixels. Now this is a smartphone thermal imager so it wouldn’t be completely fair and accurate to compare it to handheld thermal cameras, but we will do it anyway. It has 110,592 pixels to show in the thermal image in total. That is more than 5 times more data than you would get in a thermal camera for this price. So pixel for pixel this is probably the best value camera out there.

And this resolution shows when you use the device. The images look very clear and detailed. It doesn’t have a visual camera but then you won’t need one because the level of detail is so high that you would think the image is produced from a blend of thermal and visible light similar to Flir’s MSX. When you take it outside, it is like using night vision goggles. You can use its infrared vision to spot wildlife in the dark because it has a useful digital zoom feature.

Together with the ThermViewer app, the device can capture photos and record video. Together with the photos, all the radiometric temperature data is stored.

Then there is another thing: Hti is not a US manufacturer and as far as I can see, will not really comply with US export regulations since they put in a crazy 25Hz refresh rate. The picture is smooth and it exceeds any thermal camera in the US. Normally, these devices for temperature screening and spotting warmth are limited to 9Hz because of US export regulations. Given the high refresh rate and resolution, I could see this device being used in temperature monitoring or thermally screening people who come in and out of a building.

And things don’t stop there. It also has a manual focus mode embedded, making it one of the few cameras to offer this feature.

Hti HT-301 – Temperature Range, Accuracy

Let’s have a look at the temperature measurement accuracy and range of this termal imaging device and here things keep getting better and better.

First of all, the temperature sensitivity is 0.06° C which is a solid value. Most high-performance thermal cameras have a sensitivity around 0.05 to 0.06.

(Video) Thermal HTI HT 301 with ThermViewer

Then there is the temperature range where the HTi 301 also shines: This thermal imaging camera can detect and monitor temperatures from -20 to 400 Celsius. That is wide range which allows you to use it in cold environments, to troubleshoot any kind of refrigeration device or freezer. The upper end of the range allows you to detect insulation issues in ovens, stoves or heaters.

But what about the accuracy? Hti states that this device has a +/- 3° C accuracy which is a bit above the +/- 2.5 that you would expect from a camera with this price tag.

Then we get to the viewing angle and here things don’t look that great because it has a narrow viewing angle of 32° x 24°. Now, the narrow viewing angle is not necessarily a bad thing, it just means that it is focused towards a certain type of applications.

The narrower the viewing angle and the higher the resolution, the more tiny details you can spot. One great application for this can be the inspection of PCB boards or overheating fuses as well as electrical wiring faults. A youtuber recently showed how you can use the HTI 301 to inspect PCB boards and how the camera can focus very closely to the subject.

Hti HT-301 – Battery life & Memory

This being a smartphone thermal imager, it makes use of your phone’s storage so it doesn’t have any kind of embedded internal memory.

It also makes use of the phone’s battery, so it doesn’t have a specific battery life because that will greatly depend on the size of your phone battery and how much energy it uses. If you want great battery life, you can just pair it with a Motorola One 5G that has a 5000mah battery and USB-C connector so you don’t have to use the adapter.

This infrared camera isn’t waterproof or dustproof and Hti has not published any kind of IP rating for it. But this isn’t unusual because no other smartphone infrared camera is waterproof. At best, it comes with a waterproof carrying case.

(Video) How to use HTI HT-301 Thermal Camera in some different way (and for airsoft gun too) - Eng Sub

There is no LCD either, it uses the smartphone’s screen which is the best option.

Our Score

FAQs

Does thermal camera really work? ›

Thermal cameras detect temperature by recognizing and capturing different levels of infrared light. This light is invisible to the naked eye, but can be felt as heat if the intensity is high enough. All objects emit some kind of infrared radiation, and it's one of the ways that heat is transferred.

Are thermal imagers reliable thermometers? ›

Recommendations for Consumers, Health Care Providers and Other Users of Thermal Imaging Systems. Measure only one person's temperature at a time. To date, these systems have not been shown to be effective or accurate when used to take the temperature of multiple people at the same time.

Can a thermal camera see through a house? ›

No, thermal cameras cannot see through walls, at least not like in the movies. Walls are generally thick enough—and insulated enough—to block any infrared radiation from the other side. If you point a thermal camera at a wall, it will detect heat from the wall , not what's behind it.

Can a thermal camera see through walls? ›

Thermal imaging devices can't “see” through walls. But pointing a thermal camera at a building still reveals sensitive information about what's going on inside. Thermal cameras read the heat radiating off of an object.

Can a thermal camera see through clothes? ›

Can Thermal imaging cameras see through clothing? No, thermal imaging cameras can detect the temperature of the cloth but will not see through it.

What is the difference between infrared camera and thermal camera? ›

Active IR systems use short wavelength infrared light to illuminate an area of interest. Some of the infrared energy is reflected back to a camera and interpreted to generate an image. Thermal imaging systems use mid- or long wavelength IR energy.

What are the three different types of thermal imaging technology? ›

Infrared cameras come in three basic types: short wavelength, mid-wavelength, and long wavelength. Each type has its own place in facilities maintenance, depending on use and operation.

What are the disadvantages of thermography? ›

Drawbacks or disadvantages of Thermal Imaging

Images are difficult to interpret in specific objects having erratic temperatures. ➨Accurate temperature measurements are hindered by differing emissivities and reflections from surfaces. ➨Thermal imaging cameras are not used for study of under water objects.

Is thermal or night vision better? ›

Thermal scopes can easily detect animals or moving objects from a long distance whether it is day or night. Their detection is better than night vision scopes. Even in the roughest weather, they can help you see (except in extreme cold).

Which infrared thermometer is the most accurate? ›

ennoLogic - eT650D. The ennoLogic – eT650D proved to be the most consistently accurate infrared thermometer and is our choice for best overall. It has dual-laser technology with a 10:1 distance-to-spot ratio. Its temperature range is -58 ℉–1202 ℉, one of the broadest of the thermometers we tested.

How accurate are infrared cameras? ›

You'll notice that most IR camera data sheets show an accuracy specification such as ±2ºC or 2% of the reading. This specification is the result of a widely used uncertainty analysis technique called “Root‐Sum‐of‐Squares”, or RSS.

How far can thermal cameras see? ›

Depending on the camera configuration chosen it may be possible to detect humans beyond 15 km distance, ground vehicles or small boats beyond 20 km, larger ships or vessels and aircraft beyond 30 km.

Can a thermal camera see through floors? ›

A thermal imaging camera can detect heat patterns through flooring, thereby showing where a system is effective.

Can you see fish with thermal imaging? ›

Unfortunately, thermal imaging will not help you see fish when you are fishing because fish are cold-blooded creatures whose temperature is not constant and depends on the water temperature.

Can police helicopters see inside your house? ›

Police Helicopters can see into your home only when looking through a window with the HD color camera. The infrared camera is unable to look through walls, roofs, or structures because it only detects heat given off by an object. It can see if a house, room, or roof is hotter than its surroundings.

Are thermal cameras legal? ›

Thermal Imaging Case

However, the U.S. Supreme Court has since extended the warrant requirement to the use of thermal imaging devices, prohibiting police officers from using such devices without a warrant to detect indoor activities.

Can a thermal camera see through blinds? ›

Blinds are still effective even for blocking thermal camera drones from seeing indoors, and the thicker the curtain, the fewer chances there are to see through them.

What is the difference between thermal and infrared? ›

An IR thermometer, also known as a spot pyrometer or a temp gun, gives you a single number—the temperature measurement of a single spot on your target. A thermal imaging camera gives you temperature readings for each pixel of the entire thermal image, and allows you to visualize an entire scene in thermal.

Does aluminum foil block infrared? ›

Any electrically conductive material will block infrared radiation. The greater the conductivity, the greater the blocking. ​Food wrapped in aluminum foil. Since aluminium foil is a highly conductive material, it will kill all infrared radiation.

Can you see at night with thermal? ›

Night vision is impaired by conditions like dust, smoke, overcast nights, rain, and fog. Thermal imaging is not impaired by these conditions and can see in complete darkness. Night vision is an outdated technology that, while it still has its uses, is cheaper but lower quality than other options.

Can you see infrared cameras at night? ›

IR cameras detect these invisible infrared wavelengths, enabling the camera to see in the dark. Most IR cameras have a series of IR LEDs (often situated around the lens) that transmit infrared light at night, or whenever the camera switches to night mode.

Do infrared cameras work in daylight? ›

Do Infrared Cameras Work In the Daylight? Infrared cameras should not be confused with night vision, which enhances visible light. Because infrared cameras measure light that is not visible, they can work in darkness as well as daylight.

Why are thermal cameras so expensive? ›

Another principal issue that makes the thermal cameras so expensive than the visible light cameras involves the price of material used for lenses. Glass is not crystal-clear in the range of wavelength used by the infrared sensors of thermal imaging. Hence, a unique and distinct material is needed for lenses.

Can thermal cameras see through fog? ›

Although thermal imaging cameras can see in total darkness, through light fog, light rain, and snow, the distance they can see is affected by these atmospheric conditions.

What should you not do before the thermography? ›

4 Hours Prior:
  • Avoid hot showers or shaving.
  • Avoid physical therapy or exercise.
  • No coffee, tea, soda, or other beverages containing caffeine. No alcoholic beverages.
  • Do not smoke cigarettes or use any product which contains nicotine.
  • Women- do not wear a bra for the 4 hours leading up to the exam.

What is the main drawback of infrared technology? ›

Following are the disadvantages of Infrared sensor: ➨Infrared frequencies are affected by hard objects (e.g. walls, doors) , smoke, dust, fog, sunlight etc. Hence it does not work through walls or doors. ➨Infrared waves at high power can damage eyes.

What are the applications of thermography? ›

Applications
  • High-Speed Thermography. Get even faster and analyze temperatures at highest process speeds.
  • Micro-Thermography. ...
  • Additive Manufacturing. ...
  • Laser Industry. ...
  • Material Testing. ...
  • Spectral Thermography. ...
  • Active Thermography. ...
  • Bonding and Sealing.

Can you see snakes with thermal imaging? ›

Against the background of other objects, humans, animals, or cars have higher temperatures, and they show up more clearly on the device's screen. However, cold-blooded animals like snakes, for example, would be virtually impossible to detect with a thermal imager.

How long do thermal scopes last? ›

A good quality thermal scope may offer power for nearly 8 hours after a single charge.

Can you see deer antlers with thermal imaging? ›

Typically, deer have antlers so the thermal should be able to definitively tell you that none of your deer have horns. With a thermal, you can see the antlers when they are growing in and there is blood running in them. When they stop growing and harden you most likely can't see them, especially at any distance.

How do I know if my infrared thermometer is accurate? ›

The accuracy of an infrared thermometer can be checked using a comparator at any stable temperature. However, to reduce the possibility of a difference in temperature between the inside surface and the base test hole, it is more accurate at 22°C, ambient room temperature.

How reliable are infrared thermometers? ›

Research has shown that, when used correctly, infrared or no-contact thermometers are just as accurate as oral or rectal thermometers. No-contact thermometers are popular among pediatricians, as kids often squirm around when trying to get a temperature read, but it also holds true in mass temperature screenings.

How do I choose an infrared thermometer? ›

Selection tip: When choosing an IR thermometer, think about how far away you'll need to be from the things you're measuring, and how small those things are. The smaller and farther away the target, the higher D:S. ratio you'll need. Most IR thermometers have laser pointers to help target the measurement.

What can you see with infrared light? ›

Infrared light has longer wavelengths and lower energy than visible light and cannot be seen with the human eye. Mosquitoes, vampire bats, bed bugs, and some snake and beetle species, however, can use portions of the infrared spectrum for vision. Sometimes humans can “see” infrared energy in the form of heat.

How much is the thermal scanner? ›

Thermal Scanner with Stand Prices and Specs in Philippines | 09/2022 | For As low As 349.00.

How does a thermal scanner measure temperature? ›

Keep the device around 5 cm from the forehead to get accurate readings. Place the thermometers close to the area of measurements such as wrists or forehead. Ideally, maintain a gap of 5 cm between the two. Gently push the trigger and measure the temperature as shown on the LCD screen.

What kind of camera can see through walls? ›

The XaverTM800 provides the most comprehensive view behind the wall, and it is also the closest to truly 'seeing through the wall'. The XaverTM800 is a full 3D imaging device usually used in ISR (Intelligence, Surveillance and Reconnaissance) work.

Can you block thermal imaging? ›

To reduce the probability of detection with a thermal imaging camera, it is necessary to eliminate or reduce heat radiation from your body. If you don't have a specialized uniform, the easiest way is to wear tight pants, a tight jacket, thick gloves, and a multi-layer balaclava.

How do soldiers avoid thermal imaging? ›

Across the globe, the US Army is eyeing two new technological breakthroughs to avoid thermal imaging, with the help of US camouflage manufacturer Fibrotex. These are the Ultra-light Camouflage Netting System (ULCANS) and the Improved Ghillie System (IGS).

How deep into the ground can a thermal camera see? ›

The subterranean limit for most radar is about 30 feet, El-Baz said. Infrared imaging, which detects surface-level heat differences above buried objects, is most effective to a depth of about five feet, he said, though it, too, has been used to track objects 25 feet down.

Can you zoom a thermal camera? ›

Be aware that using the zoom function on your thermal camera only enlarges the pixels: it does NOT enhance your ability to measure small targets. If the target is particularly small, you may be able to get closer to make sure you have at least 3 × 3 pixels to measure.

Do police use infrared cameras? ›

Thermographic cameras are used by law enforcement personnel to create images using thermal light, i.e. heat, as opposed to a traditional camera that use visible light.

Can a thermal camera see through walls? ›

Thermal imaging devices can't “see” through walls. But pointing a thermal camera at a building still reveals sensitive information about what's going on inside. Thermal cameras read the heat radiating off of an object.

Can thermal cameras see through water? ›

Do thermal cameras work underwater? Thermal cameras don't tend to work well underwater. The reasons are, in part, related to the issues with glass outlined above. Water blocks a lot of infrared wavelengths, much as an opaque barrier blocks visible light wavelengths.

Can police see through walls? ›

Range-R radar gives cops ability to 'see' through walls - YouTube

How far can thermal cameras see? ›

Depending on the camera configuration chosen it may be possible to detect humans beyond 15 km distance, ground vehicles or small boats beyond 20 km, larger ships or vessels and aircraft beyond 30 km.

How far can thermal cameras see underground? ›

Infrared imaging, which detects surface-level heat differences above buried objects, is most effective to a depth of about five feet, he said, though it, too, has been used to track objects 25 feet down.

What are the limitations of thermal imaging? ›

Drawbacks or disadvantages of Thermal Imaging

Thermal imaging products require high initial investment cost. ➨Images are difficult to interpret in specific objects having erratic temperatures. ➨Accurate temperature measurements are hindered by differing emissivities and reflections from surfaces.

How do thermal cameras detect heat? ›

All objects emit infrared energy, known as a heat signature. An infrared camera (also known as a thermal imager) detects and measures the infrared energy of objects. The camera converts that infrared data into an electronic image that shows the apparent surface temperature of the object being measured.

Can police helicopters see through walls? ›

Police Helicopters can see into your home only when looking through a window with the HD color camera. The infrared camera is unable to look through walls, roofs, or structures because it only detects heat given off by an object. It can see if a house, room, or roof is hotter than its surroundings.

Can you zoom a thermal camera? ›

Be aware that using the zoom function on your thermal camera only enlarges the pixels: it does NOT enhance your ability to measure small targets. If the target is particularly small, you may be able to get closer to make sure you have at least 3 × 3 pixels to measure.

Do police use infrared cameras? ›

Thermographic cameras are used by law enforcement personnel to create images using thermal light, i.e. heat, as opposed to a traditional camera that use visible light.

Can you see fish with thermal imaging? ›

Unfortunately, thermal imaging will not help you see fish when you are fishing because fish are cold-blooded creatures whose temperature is not constant and depends on the water temperature.

Can thermal cameras see through water? ›

Do thermal cameras work underwater? Thermal cameras don't tend to work well underwater. The reasons are, in part, related to the issues with glass outlined above. Water blocks a lot of infrared wavelengths, much as an opaque barrier blocks visible light wavelengths.

Are thermal scanners accurate? ›

Thermal imaging systems have not been shown to be accurate when used to take the temperature of multiple people at the same time. The accuracy of these systems depends on careful set-up and operation, as well as proper preparation of the person being evaluated.

What are the three different types of thermal imaging technology? ›

Infrared cameras come in three basic types: short wavelength, mid-wavelength, and long wavelength. Each type has its own place in facilities maintenance, depending on use and operation.

What is the main drawback of infrared technology? ›

Following are the disadvantages of Infrared sensor: ➨Infrared frequencies are affected by hard objects (e.g. walls, doors) , smoke, dust, fog, sunlight etc. Hence it does not work through walls or doors. ➨Infrared waves at high power can damage eyes.

Why are thermal cameras so expensive? ›

Another principal issue that makes the thermal cameras so expensive than the visible light cameras involves the price of material used for lenses. Glass is not crystal-clear in the range of wavelength used by the infrared sensors of thermal imaging. Hence, a unique and distinct material is needed for lenses.

What is the difference between infrared camera and thermal camera? ›

Active IR systems use short wavelength infrared light to illuminate an area of interest. Some of the infrared energy is reflected back to a camera and interpreted to generate an image. Thermal imaging systems use mid- or long wavelength IR energy.

Can thermal cameras see through fog? ›

Although thermal imaging cameras can see in total darkness, through light fog, light rain, and snow, the distance they can see is affected by these atmospheric conditions.

Videos

1. Hti HT-301. You can download a completely original footage. The freeze has also been resolved.
(BikeFunJapan)
2. Thermal video captured on an HTI HT-301 thermal camera
(ThermalZoo)
3. OpenHD Thermal Camera (Hti-301) Test 1
(Stephen Oliver)
4. Thermal Camera HTI HT 301 with ThermViewer Part 2 (bahasa Indonesia with English sub)
(Rudy)
5. HT-301 Thermal Camera on Collie Farm
(Collie Farm)
6. Vividia HT-301 Thermal Imaging Camera for Android Phones
(Oasis Scientific)

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