OGI for hydrocarbons gas leaks
Mileva 33 Ex is SENSIA’s latest model of Optical Gas Imaging (OGI) for the detection of fugitive emissions of hydrocarbon gases (HxCx). It integrates a spectrally optimized high-resolution cooled detector that increases the detection sensitivity for leaks down to 0.4 g/h of CH4.
Mileva 33 Ex by PASSIVE IR absorption can detect all the hydrocarbons and VOCS (including CH4) on the 3.2 – 3.4 μm wavelength.
The detection distance is higher than 100m and VOC leak images and videos can be recorded and played inmediately.
Base Specifications
| FPA | Cooled InSB cold filter 640 x 512 px |
| Pixel Pitch | 15 μm |
| NETD | <15mK @ +50ºC |
| Lenses | N: 12ºx9º | M: 18ºx13º |
| Accuracy | ± 1ºC (from 0ºC to 70ºC Scene Temp.) |
| Storage | SD card up to 256 GB |
| Transfer speed better than 500Mb/s | |
| Weight | 3,9 kg |
| Autonomy | 3 x 3 hr |
| Display | TFT LCD panel 5″ HD |
| Max. Dimensions | 251 x 262 x 151 mm |
| Operation Temperature | -15ºC to +50ºC |
| Minimum Detectable Leak Rate (CH4) | 0,4 g/h* |
| Certifications | EMC (EN 61326:2013) |
| IP 65 (EN 60529:2018) | |
| ATEX Zone II (EN 60079:2013)
II 3G Ex nR IIC T6 |
* ΔT gas-background >5 ºC and orifice diameter 1/4”
Features Under Demand
Volatile Organic Compounds (VOC’s)
| Methanol | Ethanol |
|---|---|
| Ethylbenzene | Heptane |
| Methane | Pentane |
| MEK | MIBK |
| Benzene | 1-Pentene |
| Toluene | Xylene |
| Ethane | Isoprene |
| Propane | Ethylene |
| Propylene | Butane |
| Octane | Hexane |
The following chart shows and compares the MDLR (Minimum Detectable Leak Rate) value of different hydrocarbons for each SENSIA OGI technology.
| MDLR (g/h) | Mileva 33 | Caroline |
|---|---|---|
| Benzene | 2.1 | 6.3 |
| Butane | 0.15 | 0.6 |
| Ethane | 0.34 | 1.02 |
| Ethanol | 0.5 | 1.5 |
| Ethylbenzene | 0.9 | 2.7 |
| Ethylene | 3.4 | 1.02 |
| Heptane | 1.2 | 4.8 |
| Hexane | 1 | 3 |
| Isoprene | 6.4 | 19.2 |
| MEK | 2.5 | 7.5 |
| Methane | 0.35 | 1.4 |
| Methanol | 2.1 | 6.3 |
| MIBK | 1.4 | 5.6 |
| Octane | 0.8 | 3.2 |
| Pentane | 2 | 8 |
| 1-Pentene | 4.3 | 12.9 |
| Propane | 0.15 | 1.43 |
| Propylene | 2.1 | 8.4 |
| Toluene | 3 | 9 |
| Xylene | 0.8 | 2.4 |
Considerations related to the MDLR determination for the SENSIA OGI’s
- Leak observation is done at distance short enough to ensure the leak resolvancy with various pixels
- Characterization test conditions:
o Background temperature controlled
o Outlet Orifice Diameter= ¼’’
o CH4 diluted with N2 (25% methane)
- Gas Detection condition using High Sensitivity Mode
The following table shows the gas detection capabilities of the SENSIA OGI’s under real scenarios conditions.
| Caroline | Mileva 33 | |
|---|---|---|
| Minimum Methane mass flow rate for detection | Detection distance | Detection distance |
| 0,3 g/s | 50 m | 125 m |
| 0,5 g/s | 100 m | 250 m |
This table specifies the minimum mass flow rate, for methane as the reference gas, that can be detected by each technology from a certain distance.
Innovative capabilities assembled under a single control software
Enhanced Mode
RedLook is capable of automatically coloring the gas to facilitate the identification. With SENSIA OGI cameras, you can scan broad sections of equipment rapidly and survey areas where traditional contact measurement tools cannot access.
Quantitative OGI
Placing the OGI on a tripod activates automatic quantification of gas leaks: fast, accurately and safely.
Mileva for leaktightness verification
Mileva 33 Ex has a new design, a 5-inch touch screen and runs under RedLook Embedded, the most powerful and intuitive software for gas visualization. This control and analysis software unfold the full potential of Mileva 33 Ex Optical Gas Imaging.
Mileva 33 Ex has the main international certifications in temperature, humidity, vibration, dust and water intrusion and hazardous environments. With this new OGI, the operator can inspect locations under severe restrictions, that generally impede SMART Leak Detection and Repair operations.
Mileva for leaktightness verification
Mileva 33 Ex has a new design, a 5-inch touch screen and runs under RedLook, the most powerful and intuitive software for gas visualization. This control and analysis software unfold the full potential of Mileva 33 Ex Optical Gas Imaging.
Mileva 33 Ex has the main international certifications in temperature, humidity, vibration, dust and water intrusion and hazardous environments. With this new OGI, the operator can inspect locations under severe restrictions, that generally impede SMART Leak Detection and Repair operations.
MAIN FEATURES AND SPECIFICATIONS
Software application designed for LDAR campaigns
Human Interface
5' HD display with touch screen
USB - Rechargeable Batteries
3S li-ion with over/under voltage and short circuit protection
Ergonomics and Confort
Pivoting screen and handle with joystick controller
ATEX Certification
ATEX certified for safe use in explosive atmospheres
ISO 9001:2015
SENSIA is certified under the ISO standard for the 'design, development and manufacturing of infrared technology'