KR Series

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Why Choose KPT KR Series Thermal Modules?

KR Series uncooled infrared thermal imaging modules offer three resolution options — 256×192, 384×288, and 640×512 — built on high-frame-rate 12 µm WLP-packaged VOx detectors and high-performance ISP chips. Designed to meet strict SWaP requirements, the series delivers high performance in an ultra-compact, lightweight, and low-power package.

A key advantage is the shutterless algorithm that enables smooth, continuous imaging. Combined with advanced thermal image processing algorithms, the modules produce clear and detailed imagery. Multiple digital interfaces (DVP, BT.656, USB 2.0, MIPI) allow flexible integration.

In addition to high-quality thermal imaging, the KR Series can support temperature measurement applications through software algorithms and proper blackbody calibration, making it suitable for basic radiometric needs in industrial inspection, electrical equipment monitoring, and portable thermal devices.

With module size as small as 21×21×10.3 mm, weight under 7–8.6 g, and power consumption as low as <0.35 W, the KR Series is ideal for handheld devices, wearable systems, compact UAVs, and any space-constrained application that requires both clear imaging and optional temperature measurement capability.

KR Series Technical Specifications

Parameter	KR2	KR3	KR6
IR Detector	VOx uncooled microbolometer	VOx uncooled microbolometer	VOx uncooled microbolometer
Resolution / Pixel Pitch	256×192 @ 12 μm	384×288 @ 12 μm	640×512 @ 12 μm
Spectral Range	8 μm ~ 14 μm	8 μm ~ 14 μm	8 μm ~ 14 μm
NETD	≤40 mK @ F1.0, 25°C	≤40 mK @ F1.0, 25°C	≤40 mK @ F1.0, 25°C
Frame Rate	25 / 50 Hz	30 / 60 Hz	30 / 60 Hz
Thermal Time Constant	<12 ms	<12 ms	<12 ms
Lens Options	4 / 5.3 / 9.1 / 13 / 15 / 19 / 25 mm	4 / 7 / 9.1 / 13 / 19 / 25 / 35 / 50 mm	Same as KR3
NUC Correction	Shutter / Shutter-less Algorithm	Shutter / Shutter-less Algorithm	Shutter / Shutter-less Algorithm
Brightness / Contrast	0~100, optional	0~100, optional	0~100, optional
Digital Zoom	1.0~8.0× continuous (step 0.1)	1.0~8.0× continuous (step 0.1)	1.0~8.0× continuous (step 0.1)
Image Mirroring	Vertical / Horizontal / Diagonal	Vertical / Horizontal / Diagonal	Vertical / Horizontal / Diagonal
Polarity / Palette	White Hot / Black Hot / Various	White Hot / Black Hot / Various	White Hot / Black Hot / Various
Analog Video	PAL / NTSC	PAL / NTSC	PAL / NTSC
Digital Video	DVP / BT.656 / USB 2.0 / MIPI	DVP / BT.656 / USB 2.0 / MIPI	DVP / BT.656 / USB 2.0 / MIPI
Power Supply	5 VDC	5 VDC	5 VDC
Typical Power Consumption (USB)	<0.35 W	<0.42 W	<0.7 W
Communication Interface	UART / I²C / USB 2.0	UART / I²C / USB 2.0	UART / I²C / USB 2.0
Size (without lens)	21 × 21 × 10.3 mm (W×H×L)	21 × 21 × 10.3 mm (W×H×L)	21 × 21 × 10.3 mm (W×H×L)
Weight (without lens)	<7 g	<7 g	<8.6 g
Humidity	5%RH ~ 95%RH, non-condensing	5%RH ~ 95%RH, non-condensing	5%RH ~ 95%RH, non-condensing
Working Temperature	−40°C ~ +80°C	−40°C ~ +80°C	−40°C ~ +80°C
Storage Temperature	−50°C ~ +85°C	−50°C ~ +85°C	−50°C ~ +85°C
Vibration	6.06 g, random, all axes	6.06 g, random, all axes	6.06 g, random, all axes
Shock	80 g @ 4 ms, final peak sawtooth, 3 axes / 6 directions	Same as left	Same as left
Extensible Features	PIP, AHD/SDI/Camera Link output, Crosshair, Hot tracking, Lens driving (zoom / electric & auto focus)	Same as left	Same as left

Detection / Recognition / Identification Distance Reference

Lens	FOV (640×512)	FOV (384×288)	Detect (Human)	Recognize (Human)	Identify (Human)	Detect (Vehicle)	Recognize (Vehicle)	Identify (Vehicle)
f4.6 mm F1	79.7° × 67.5°	53.2° × 41.2°	256 m	128 m	64 m	588 m	294 m	147 m
f9.1 mm F1	45.8° × 37.3°	28.4° × 21.5°	506 m	253 m	126 m	1163 m	581 m	291 m
f13 mm F1	32.9° × 26.6°	20.1° × 15.1°	722 m	361 m	181 m	1661 m	831 m	415 m
f19 mm F1	22.9° × 18.4°	13.8° × 10.4°	1056 m	528 m	264 m	2428 m	1214 m	607 m
f25 mm F1	17.5° × 14°	10.5° × 7.9°	1389 m	694 m	347 m	3194 m	1597 m	799 m
f35 mm F1	12.5° × 10°	7.5° × 5.7°	1944 m	972 m	486 m	4472 m	2236 m	1118 m

Frequently Asked Questions about the KR Series

What applications is the KR Series thermal imaging core best for?

The KR Series is ideal for handheld thermal cameras, wearable devices, compact UAV gimbals, portable industrial inspection tools, mini security systems, and any project that demands the smallest possible size, lowest power consumption, and optional temperature measurement capability.

What is the power consumption of the KR Series thermal core?

The KR Series is extremely power-efficient. Typical power consumption is less than 0.35 W for the KR2 (256×192), less than 0.42 W for the KR3 (384×288), and less than 0.7 W for the KR6 (640×512) when using USB output, making it one of the lowest-power options in its class.

Does the KR Series support temperature measurement?

Yes. Based on its high-sensitivity VOx detector, the KR Series can support temperature measurement functions through software algorithms and blackbody calibration. It is suitable for industrial inspection, electrical equipment monitoring, and other applications requiring basic radiometric capability. Specific accuracy and temperature range depend on calibration and actual use case — please contact us for detailed solutions.

Can the KR Series thermal module measure temperature?

Yes. Although primarily designed as a high-performance imaging module, the KR Series can support temperature measurement functions through software algorithms and blackbody calibration. It is suitable for basic industrial inspection, electrical equipment monitoring, and portable thermal applications that require both imaging and simple radiometric capability.

Does the KR Series support shutterless thermal imaging?

Yes. The entire KR Series features a shutterless algorithm that delivers smooth, continuous thermal imaging without the interruption caused by mechanical shutters. This makes it ideal for applications requiring uninterrupted video output.

What is the smallest thermal imaging module in the KPT lineup?

The KR Series is currently the most compact uncooled thermal imaging core from KPT. With a size of only 21×21×10.3 mm and weight under 7–8.6 g (excluding lens), it is specifically designed for space-constrained applications such as handheld devices, wearable systems, and mini UAV payloads.