User Guide

Visit for the latest version of this manual and firmware updates for your drone and accessories.

v Beta 1.0 – Oct. 2021



Thank You

Thank you for purchasing the GC3-T waterproof 3-axis Gimbal Thermal Camera. We have designed and manufactured the GC3-T to the highest quality standards.
Like any precision equipment, long-life and trouble-free operation rely on proper care and maintenance. With proper care and maintenance, you should enjoy your product for many years. It is important to familiarize yourself with the features of this unique product by carefully studying this manual.

Visit for the latest manuals, firmware, and tips. Refer to the Version Information section at the end of this manual, which details additions and corrections to this manual.

Using this Manual

This document is designed to be printed or viewed on a computer or mobile device. If used electronically, you can search directly for terms like “Propeller” to find references.

Additionally, you can click on any topic in the Table of Contents to navigate directly to that topic.


The user guide is the best companion while using the product. For the specific problem using the product, the FAQ can be another great resource for you to look at. Go to the SwellPro website, look for support >product support > the product > FAQ to find the FAQ page.

Video Tutorials

Visit and subscribe to the SwellPro YouTube channel for tutorial videos and product information. Scan this QR code with your camera phone to go to our channel.

Social Media

Join our SwellPro Facebook page to meet other people who share their adventures with SwellPro.

Register Product Warranty

Please register your product as soon as possible to ensure warranty coverage.

Download the SDFly App

For Apple devices, download the SDFly app on the AppStore. For Android devices, download the SDFly app on the Google Play Store or scan the QR code to download and install the app.


READ AND UNDERSTAND ALL PRECAUTION INFORMATION BEFORE USING THIS PRODUCT. Failure to follow these safety instructions may result in permanent damage to the product.

Do not point the thermal camera to strong energy sources, such as sun, laser beam, or lava. The observed object’s temperature should not exceed 800℃, as the high energy radiation is harmful to the thermal camera.

Do not place the camera near any heat sources, such as fire, engines, heating, or inside the vehicle under prolonged sunlight exposure.

The ideal working temperature is -20℃ ~ 50℃.

Do not touch the thermal camera lens with your fingers or any other object, as oil or other substance covering the lens leads to blurred images and inaccurate temperature detection.

Do not use alcohol or alkaline detergent to clean the camera lens, as it can erode the surface and coating on the lens. Instead, use a clean, dry, soft cloth to clean the lens.

Do not frequently power on/off the camera, as it might shorten the product lifespan.

Wait for at least 1 min in between the power on/off.
Do not insert or unplug the microSD when the camera is on, as it might cause files loss or hardware issues.
Ensure to press the rubber microSD card cover firmly in place to prevent water ingress in use.
Do not disassemble the camera. If you have any issues with the camera, contact SwellPro Support.

Product Overview

GC3-T Waterproof 3-axis Gimbal Thermal Camera features both a high resolution thermal infrared camera and a full HD low-light camera with a dimmable LED flashlight, which can provide both infrared and visible light imaging simultaneously and allow for a quick switch between the two.

The thermal infrared camera features high resolution (640 x 512), high sensitivity (≤50mk@f/1.0), wide range (-20℃ to 500℃) infrared thermal imaging. Powerful enough for missions ranging from search & rescue, security detection, precision agriculture to various industrial inspections, such as routine power line inspection, roofing, and solar panels maintenance, bridge defect detection, etc.

The low-light camera can capture full HD imaging in a dark environment when the regular camera cannot return any images. When operating in complete darkness, the dimmable LED flashlight still gives you the confidence to maintain the vision. With the low light camera, whenever you find the object of interest using the infrared thermal camera, you can always switch back to give a visual confirmation of the object.

With the SwellPro waterproofing technology and compatibility with the powerful SplashDrone 4 flight flatform, you will get excellent aerial thermal imaging in any harsh weather conditions.

In the Box

Product Diagram

1. Gimbal Mount
2. Roll Motor
3. Tilt Motor
4. Gimbal Connector
5. Pan Motor
6. microSD Card Slot
7. Low light Camera
8. Infrared Thermal Camera
9. Dimmable LED Flashlight


Install the Gimbal

Unscrew and take off the gimbal port cover plate using a hex screwdriver. (Equipped with SplashDrone 4)

Plug the gimbal connector into the drone’s gimbal port and screw it in place with a screwdriver.

Make sure the rubber ring is attached to the gimbal connector before you screw the connector.

Aline the holes on the gimbal mount to the bottom of the drone, screw in to mount the gimbal. Make sure the camera is pointing to the front of the drone.

Install the SD Card

  1. Open the rubber sealing on the top of the camera, insert the microSD card in the correct direction, press the microSD card. The “click” sound indicates that the installation is in place.
  2. After installing the microSD card, plug the rubber seal back.

Make sure the rubber sealing is firmly in place to ensure waterproofing.

  • The GC3-T supports microSD cards with a maximum capacity of 128GB. Since the camera requires fast reading and writing of high-stream video data, please use microSD cards with Class 10 or UHS-1 or above to ensure proper functioning.
  • Do not plug or unplug the microSD card during use, as files may be damaged or lost.
  • Once you finish recording, stop recording and save the file. If you turn off the power directly before saving the files, the recording file might be damaged.

Camera Status Indicator

There is a camera status indicator on the back of the camera to indicate the camera’s working status. It flashes green or red.

SwellPro GC3 T Axis Gimbal Thermal Camera - LED1 Solid Green Ready to shoot
SwellPro GC3 T Axis Gimbal Thermal Camera - LED2 Flashing Green No SD card
SwellPro GC3 T Axis Gimbal Thermal Camera - LED3 Flashing Red Once Taking photo
SwellPro GC3 T Axis Gimbal Thermal Camera - LED4 Flashing Red Video recording

SwellPro GC3 T Axis Gimbal Thermal Camera - LED5Solid
SwellPro GC3 T Axis Gimbal Thermal Camera - LED6Flashing


Gimbal Control

Remote controller


Tilt ①: Roll the right gimbal control as shown to turn the gimbal up or down from 0° to -90°.

Dimmable LED light control ②: Roll the left gimbal control to adjust the brightness of the dimmable LED light. (Dimmable LED light works the best when the aircraft is 15 meters away from the subject.)

Gimbal Button

There are two gimbal modes: Follow mode and Lock mode. The default mode is Follow mode.

Follow mode keeps the gimbal direction to the head of the drone.

Lock mode locks the gimbal position to a fixed angle instead of following the drone’s direction.

Press the GIMBAL MODE button once to restore the central position.

Fast press the GIMBAL MODE button 3 times to switch gimbal modes.

Camera Control

Remote controller


Photo①: press once to take a picture.

Video②: press once to start recording, press again to stop recording, and save the file.

When taking photos or videos, the camera will take both the thermal imaging files and the RGB files and store them together in the memory card.


If there are any abnormal movements being observed or the camera is not level, you can recalibrate the gimbal camera to solve the problem.

Gimbal camera calibration is performed together with the aircraft gyroscope calibration.

To calibrate the gimbal camera, you need to proceed with aircraft gyroscope calibration.

To calibrate the gimbal camera:

  1. Place the drone on a level surface, power on the remote controller, then the drone. Wait for the aircraft to connect to the remote controller.

2. Hold the left joystick down to its lowest position, then quickly move the right joystick left to right, back and forth, until the front and rear status indicators flash alternately, or the remote controller screen prompts “WARNING aircraft Initializing,

Please Wait.” The drone will now perform gyroscope calibration. Now release the joysticks. This process will be completed in 20 seconds. Do not move the drone during this process.

3. When the front status indicators fast-flashing red, and the rear status indicators turn solid green, or “WARNING Aircraft Initializing, Please Wait” prompt disappears, power off, and restart the drone. Gyroscope calibration is complete.

Do not calibrate the gimbal camera on a boat or other moving platforms.

SDFly App

Main Interface

  1. Main Camera View
    Main Camera View displaces the Livestream of the camera view. Tap the Camera View The thumbnail on the bottom right corner to switch the Main Camera View between the thermal camera and the low-light camera.
  2. Temperature OSD
    Temperature OSD contains the Max, Min, Avg, Center temperature information detects by the thermal camera.
    Max: the maximum temperature that appears on the image.
    Min: the minimum temperature that appears on the image.
    Avg: average temperature across the whole image.
    Center: the temperature at the center of the image.
  3. Center Temperature
    The temperature at the center of the image, same as the Center on the Temperature OSD.
  4. Camera Setting
    Change camera settings and adjust camera parameters for both the thermal camera and low-light camera.
  5. Photo Taking Button
    Tap to take photos. Both the thermal photo and RGB photo (from the low-light camera) are going to take simultaneously.
  6. Video Record Button
    Tap to record video, tap again to stop, and save the video. Both the thermal video and RGB video (from the low-light camera) are going to save simultaneously.
  7. Camera View Thumbnail
    Camera View Thumbnail displaces the alternative camera view. Tap the thumbnail to change the main camera view between thermal camera view and low-light camera view.

Thermal Camera Setting


Flip the image vertically or horizontally.


Select different color palettes in various conditions to better visualize the infrared thermal imaging.


Crosshair marks the frame on the viewfinder.


Set the contrast to visualize the infrared thermal imagery better. Set the ratio of the parts which represent the hot and cool part of the imagery.


Set the brightness to visualize the infrared thermal imagery better.

DDE (Digital Details Enhancement)

DDE (Digital Details Enhancement) enhances the high spatial frequencies (edges etc.) and appears as boosted lens modulation transfer function, or MTF. The

DDE filter attenuates high amplitude signals, making more of the total dynamic range available to display faint objects and details.

Temperature OSD ON/OFF

Turn temperature OSD on or off.

Temperature Unit

Support temperatures displace in Celsius (℃), Fahrenheit (℉), and Kelvin (K).

Temperature Alarm

Temperature alarm allows for the detection of any temperatures that arise outside of the set temperature range. Temperature alarm has three options:

  • High-Temperature Alarm
  • Low-Temperature Alarm
  • High & Low-Temperature Alarm



GC3-T Gimbal Thermal Camera
Weight About 430 g
Size 134.5*134.5*117 mm
Memory card Micro SD card: supports up to 128GB of capacity, write speeds ≥ 40 MB/s, recommend using Class 10 or
above, or with a UHS-1 rating.
Working temperature -10°C – 40°C
Waterproof rating IP67
Stabilization 3-axis (tilt, pan, roll).
Controllable range Tilt: -90° to 0°
Pan: -90° to 90°
Max control speed Tilt: 60 °/s
Thermal Camera
Thermal Imager Uncooled VOx Microbolometer
Sensor Resolution 640 x 512
Lens Focal length: 19mm
Aperture: f/1.0
FOV: 22°H x 18°V
IFOV 0.63 mrad
Pixel Pitch 12 μm
Spectral Band 8~14 μm
Sensitivity (NETD) ≤50mK @25℃, f/1.0 (≤40mK Configurable)
Scene Range -20℃ to +150℃ (High Gain)
0℃ to +550℃ (Low Gain)
Full Frame Rate 50 Hz (PAL); 30 Hz (NTSC)
Photo format  JPEG
Video format  MP4,MOV
Low Light Camera
Sensors 1/2″ 2M Starlight CMOS
Lens FOV: 92.6°
Burst mode 3/5/10 shoots
Video resolution FHD:1920*1080 30/60p | HD:1280*720 120/60p
Max data stream 64 Mbps
Photo format JPEG
Video format MP4,MOV

Version Information

SwellPro products are constantly improving, so are the product user guides. It is recommended to visit to check and download the latest user guide.


Beta 1.0 GC3-T User Guide Beta 1.0 Edition

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