DP-21 Handheld Thermal Imaging Camera


DP-21 handheld thermal camera features and increased temperature range of -20°C to 450°C and a thermal sensitivity of 70mK make this a well suited to various inspections.
The strong Pip (picture in picture) function which allows the IR image to be superimposed onto the visible image for added details in your report.

Product Details


♦ Overview


Shenzhen Dianyang Technology Co., Ltd. DP-21 infrared thermal imaging handheld camera is a high-precision thermal imaging handheld device.

It combines thermal imaging and visible light to display the target object imaging, which can measure all the pixel temperature of the target object, can quickly locate the abnormal temperature point, to reduce the users’ diagnostic time.

♦ Features

High Resolution

With 320x240 high resolution, the DP-21 will easily inspect the detail of object, and the customers can select 8 color palettes for different scenarios.

It supports -10°C ~ 450°C (14°F ~ 842°F).

Iron, the most common color palette.


Tyrian, to stand out the objects.

White hot. Suitable for outdoor and hunting etc.

Hottest. Suitable for tracing hottest objects, such as tunnel inspection.

Coldest. Suitable for air condition, water leakage etc.

♦ Specification

The DP-21 Infrared thermal imaging camera specification is below,



Infrared Thermal Imaging Resolution 220x160
Frequency band 8~14um
Frame rate 9Hz
NETD 70mK@25°C (77°C)
Field of view Horizontal 35°, vertical 26°
Lens 4mm
Temperature range -10°C ~ 450°C (14°F ~ 842°F)
Temperature measurement accuracy ±2°C or ±2%
Temperature measurement Hottest, coldest, central point, zone area temperature measurement
Color palette Tyrian, white hot, black hot, iron, rainbow, glory, Hottest, coldest.
Visible Resolution 640x480
Frame rate 25Hz
LED light Support
Display Display Resolution 220*160
Display Size 3.5 inch
Image mode Outline fusion, overlay fusion, picture-in-picture, infrared thermal imaging, visible light
General Working time 5000mah battery, >4 hours in 25°C (77°F)
Battery Charge Built-in battery, it is recommended to use +5V & ≥2A universal USB charger
WiFi Support App and PC software data transmission
Operating temperature -20°C~+60°C (-4°F ~ 140°F)
Storage temperature -40°C~+85°C (-40°F ~185°F)
Waterproof and dustproof IP54
Camera Dimension 230mm x 100mm x 90mm
Net weight 420g
Package dimension 270mm x 150mm x 120mm
Gross weight 970g
Storage Capacity Built-in memory, about 6.6G available, can store more than 20,000 pictures
Picture storage mode Simultaneous storage of infrared thermal imaging, visible light and fusion images
File format TIFF format, support full frame pictures temperature analysis
Image analysis Windows platform analysis software Provide professional analysis functions to analyze full pixels temperature analysis
Android platform analysis software Provide professional analysis functions to analyze full pixels temperature analysis
Interface Data and charging interface USB Type-C(Support battery charging and data transmission)
Secondary development Open interface Provide WiFi interface SDK for secondary development

♦ Multi-mode Imaging Mode


Thermal imaging mode. All the pixels in the screen can be measured and analyzed.

Visible light mode to display as normal camera.

Outline fusion. The visible camera shows the objects edge to fusion with thermal camera, the customers can inspect the thermal temperature and color distribution, also can check the visible details.

Overlay fusion. The thermal camera overlay part of visible camera color, to let the background more clear, to identify the environment easily.

  • Picture-in-Picture. To emphasize the central part thermal information. It can quickly switch visible and thermal image to find the defect point.

♦ Image enhancement

All the color palettes have 3 different image enhancement modes to match different objects and environments, the customers can choose to display the objects or background details.


High contrast





♦ Flexible Temperature Measurement

  • DP-21 support center point, hottest and coldest tracing.
  • Zone measurement

The customer can choose central zone temperature measurement, the hottest and coldest temperature only tracing in the zone. It can filter other area hottest and coldest point’s interference, and the zone area can be zoom in and out.

(In the zone measurement mode, the right side bar will always display full screen highest and lowest temperature distribution.)

  • Visible temperature measurement

It suitable for the normal person to measurement the temperature to find the object details.

♦ Alarm

The customers can configure high and low temperature threshold, if the objects temperature is over the threshold, the alarm will display on the screen.

♦ WiFi

To enable the WiFi, the customers can transfer the pictures to PCs and Android devices without cable.

(Also can use USB cable to copy the pictures to PCs and Android devices.)


♦ Image Saving and Analysis

When the customers take a picture, the camera will automatic save 3 frames into this picture file, the picture format is Tiff, it can be opened by any picture tools in Windows platform to view the image, for example, the customers will see below 3 pictures,

The image customer took, what you see is what you get.

Raw thermal image

Visible image

With Dianyang professional analysis software, the customers can analysis full pixels temperature.

♦ Analysis Software

After import the pictures into analysis software, the customers can analyze the pictures easily, it support below features,

  • Filter the temperature by range. To filter the higher or lower temperature pictures, or filter the temperature inside some temperature range, to quickly filter some useless pictures. Such as filter the temperature lower than 70°C (158°F), only leave the alarm pictures.
  • Filter the temperature by temperature difference, such as only leave the temperature difference >10°C, only leave temperature abnormal pictures.
  • If the customers are not satisfy with the field pictures, to analysis the raw thermal frame in the software, no need go to field and take pictures again, to increase the working efficiency.
  • Support below measurement,
    • Point, Line, Ellipse, Rectangle, Polygon analysis.
    • Analyzed on thermal and visible frame.
    • Output to other file formats.
    • Output to be a report, the template can be customized by the users.

Product Package

The product package is listed below,





DP-21 infrared thermal imaging camera



USB Type-C data and charging cable






User manual



Warranty Card


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