Workswell GIS 320
Series: Workswell Thermal cameras for drones
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The Workswell GIS 320 is a cooled thermal camera from the Czech Republic for optical gas imaging. It makes methane and other hydrocarbons visible as a plume in the image and is used for leak searches from drones and ground vehicles, here for heavy multicopters. Gremsy lists it as a compatible camera for the T7 gimbal.
The detector is a cooled InSb array for the mid-wave infrared with 320 × 240 pixels. The spectral range is 3.2 to 3.4 µm, the narrow band in which hydrocarbons absorb light. The thermal sensitivity is 10 mK, the frame rate 30 Hz. Cooled detectors are more sensitive than uncooled ones but heavier and more complex.
At 30 Hz, the frame rate lies above the 9 Hz limit above which thermal modules fall under the EU Dual-Use Regulation; an export can require a licence. Operations at gas installations and in areas at risk of explosion require a separate approval (ATEX), which a standard aircraft does not bring. The operator must be registered, and data-protection law applies to images of people and property.
In gas detection, the temperature contrast between gas plume and background and the wind count, because both decide whether a leak becomes visible. The cooler of the InSb array is the wear part of limited life and needs a cool-down time before use. The GIS 320 is not meant for temperature measurement and general inspection; an uncooled radiometric camera is chosen for that. Points to check are the cooler, the optics and the calibration.
Technical data
Other data
| Detector | gekuehlter InSb-FPA (MWIR)correct |
|---|---|
| Frame rate (Hz) | 30correct |
| NETD (mK) | 10correct |
| Spectral range (µm) | 3.2-3.4correct |
| Thermal resolution | 320x240correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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