Hydrocarbon and VOC escapes shown live on screen, from up to 80 m.
How optical gas imaging works
The TC721 is a cooled-detector optical gas imaging (OGI) camera. Passive infrared imaging reads the narrow 3.2-3.5 µm band, where the target gases absorb strongly, so an escape appears as a live plume on screen.
Energised electrical equipment can be inspected from up to 80 m and kept in service throughout the survey, while the cooled 320 × 256 quantum-well detector reveals faint escapes that a conventional thermal camera would miss.
Features and advantages
- Cooled detector with a thermal sensitivity (NETD) of ≤ 0.015 °C for high-contrast imaging of small releases.
- Standard and multi-level high-sensitivity detection modes; also serves for routine infrared temperature checks (−40 °C to +500 °C).
- Visualises dozens of VOCs, including methane (CH4), ethane, propane, butane, pentane and hexane.
- Ex ic nC op IIC T4 Gc rating for potentially explosive atmospheres.
- 5 MP visible camera, radiometric image and video storage, voice and text annotation.
Applications and field documentation
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.
Complete reports on site
Findings are documented with radiometric images and video, complemented by the built-in 5 MP visible camera and voice or text notes. GPS, laser pointer and fill light assist location and low-light work.
Designed for field use
The camera operates from −20 °C to +50 °C with IP54 protection; the rechargeable lithium battery provides 4 h of continuous operation and charges on the unit.
Articulating viewfinder for awkward inspection angles
| TC721 — 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 |
| Gas detection sensitivity | 0.4 g/h of CH4 at 2 m |
| Field of view / min. focus | 14.5° × 10.8° / 0.5 m |
| Spatial resolution (IFOV) | 0.79 mrad |
| Frame rate and focus | 60 Hz; automatic, motorised or manual focus |
| Built-in visible camera | 5 MP CMOS with LED light |
| Displays | 0.6-inch HD OLED viewfinder; 5-inch HD colour touchscreen |
| Temperature range | −40 °C to +500 °C |
| Accuracy | ±2 °C or ±2 % of reading, whichever is greater |
| Measurement corrections | Temperature (auto/manual); background; atmospheric transmittance |
| Storage | 32 GB SD card (expandable); manual/automatic capture; continuous infrared and visible video |
| File formats | Infrared JPEG (14-bit with measurement data) and MPEG-4; visible JPEG / MPEG-4 |
| Annotation | 60 s voice recording (built-in microphone) and text notes |
| Auxiliary functions and interfaces | Laser pointer (1 mW / 635 nm), GPS, fill light, buzzer; video output, Wi-Fi, Bluetooth |
| Power supply | Rechargeable lithium battery, 4 h runtime; power-on < 7 min; on-unit charging |
| Environment | −20 °C to +50 °C; ≤ 90 % RH (non-condensing); IP54 |
| Hazardous-area rating | Ex ic nC op IIC T4 Gc |