The TC721 makes hydrocarbon and VOC leaks visible on screen from up to 80 m, with the installation energised and in service.
Advantages
Inspection without shutdowns
The camera relies on passive infrared imaging within the 3.2-3.5 µm band, where the target gases absorb strongly. Energised electrical equipment can be inspected from up to 80 m and kept in service throughout the survey.
Cooled detector for faint leaks
The cooled 320 × 256 quantum-well detector provides a thermal sensitivity (NETD) of ≤ 0.015 °C at 30 °C, revealing plumes that a conventional thermal camera would miss. Two detection modes are available, standard and multi-level high sensitivity, so the same instrument also covers routine infrared temperature checks.
Broad VOC coverage
Dozens of volatile organic compounds can be visualised, among them methane (CH4), ethane, propane, butane, pentane and hexane.
Certified for hazardous areas
The Ex ic nC op IIC T4 Gc rating admits the camera into the potentially explosive atmospheres common to petrochemical and gas facilities.
Complete field documentation
A 5 MP visible camera, radiometric image and video storage, and voice and text annotation allow full survey reports to be produced on site.
Applications
- Leak surveys around energised substations and switchgear.
- Petrochemical, oil-and-gas and natural-gas facilities.
- Chemical and process plants handling combustible hydrocarbons and VOCs.
About the product
The TC721 is intended for early, non-contact detection of fugitive emissions. Findings are documented with radiometric images and video, complemented by the built-in visible camera and voice or text notes for complete field reports.
Technical specifications
| Detector | Cooled quantum-well, 320 × 256 |
| Spectral range | 3.2-3.5 µm (VOC absorption band) |
| Thermal sensitivity (NETD) | ≤ 0.015 °C at 30 °C |
| Working distance | Leaks located from up to 80 m |
| Hazardous-area rating | Ex ic nC op IIC T4 Gc |
| Detectable gases | Methane (CH4), ethane, propane, butane, pentane, hexane and other VOCs |
Frequently asked questions
What is optical gas imaging (OGI)?
A passive infrared technique that reads the radiation absorbed by gases within a narrow spectral window (3.2-3.5 µm), so an escape appears as a live plume on screen.
Can energised electrical equipment be inspected?
Yes. Leaks are located from up to 80 m without taking the equipment out of service.
Is the camera suitable for explosive atmospheres?
Yes. It is certified Ex ic nC op IIC T4 Gc for use in potentially explosive gas environments.
How are findings documented?
With radiometric image and video storage, a 5 MP visible camera and voice or text annotation.
