UV SCOUT
Achieve the lowest detection limits of BTEX, VOCs, and more in a permanent installation outside or inside your facility
The Cerex UV SCOUT is a fixed, point-gas analyzer that excels in the monitoring of key UV-detectable target gases in various applications (ie. Refinery Fenceline Monitoring, Indoor Air Safety Monitoring, Leak Detection and Repair)
- Multi-gas monitoring of individual species
- PPB Minimum Detection Limits
- No water vapor interference
- Inherent calibration
- No sensors to poison
* Or continuous operation on AC power
UV SCOUT
Depending on your application, the path length may be increased up to 22 meters for a 20% improvement in detection capability.
General
Measurements: 39” x 21” x 11” (99.06cm x 53.34cm x 27.94cm)
Weight: 125lbs (56.7kg)
Performance Specs
Optical Path Length: 2 – 20 meters Internal Analysis Path
Battery Life: 4 hours standard, up to 14 hours with additional batteries or continuous operation on AC Power
Maintenance
- Sample Intake Filter
- Enclosure Air Filter
- UV Source – warranted for 4000 hours of operation, typically exceeds 5000 hours
Only three consumables make up the UV SCOUT. All are field replaceable in under 15 minutes.
Engineered for Compliance
In 2024, the US EPA issued several regulations including the HON (Hazardous Organic NESHAP) Final Rules, in an effort to reduce the number of hazardous air pollutants. As of 2025, Cerex continues to monitor changing regulations surrounding EPA Hon Final Rules.
The UV SCOUT can detect, in under 5 seconds;
- Benzene (MDL 3.0 ppb)
- Chloroprene and 1,3-Butadiene (1.0 ppb MDL)
- Ammonia, Nitric Oxide, Nitrogen Dioxide, Sulfur Dioxide, and more
The UV SCOUT complies with other US EPA regulations including:
- HON Rule for Benzene, 1,3-Butadiene, Chloroprene, Ethylene Dichloride, Vinyl Chloride
- 40 CFR § 63.658 / USEPA Method 325 A/B
- SCAQMD Rule 1180
- BAAQMD Refinery Regulation 12 Rule 15
- USEPA TO-16
- RCER-202
Our engineers are happy to discuss how we can help you meet other required regulations.
How it Works
Point UV-DOAS Technology
The Cerex UV SCOUT operates using a process known as point monitoring. Surrounding ambient gases are channeled into the analyzer where an internal cell holds the gas sample for analysis.
Next, with UV-DOAS technology, an ultraviolet light passes through the gas sample contained within the cell. Thanks to physics principles and Cerex’s proprietary software, the gas sample is translated into useable data.
Similar to the more expensive FTIR, UV-DOAS offers better detection limits at lower cost without interference from water vapor. Within seconds, any compounds present in the internal cell that are UV spectrum-detectable are identified and quantified according to their absorption from the ultraviolet light. Cerex’s Continuous Monitoring Software (CMS) outputs the data in real-time for instant results.
Raw data can be accessed remotely via phone, tablet, or computer.
The most cost-effective, permanent sampling & leak detection solution
Offering real time identification and quantification of criteria pollutants, the Hound analyzers provide a sensitive yet cost-effective solution in easy to operate, all-in-one packages.
Low maintenance and low detection limits
With only 3 consumables and the capability of simultaneous, single digit, parts-per-billion (ppb) detection levels of multiple compounds, the Hounds are the standard for ambient level detection.
Individual species of prolific hazardous air pollutants
Toxins such as Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) are known human carcinogens at ambient air levels. Our Hound analyzers are capable of simultaneously detecting these in addition to oxides of Nitrogen (NOx), CAFO emissions such as Ammonia (NH3) and Hydrogen Sulfide (H2S), Chlorine (Cl), and other volatile organic compounds (VOC’s) below hazardous levels.
Common Detectable Gases
Ultra Low Detection Limits
The Cerex UV SCOUT has as low as parts-per-billion minimum detection limits and wide dynamic ranges, allowing earlier and more thorough detection of gases than traditional sensor arrays. In comparison to outdated technologies, UV SCOUT analyzers feature multi-gas monitoring of individual species, lower detection limits, no water vapor interference, inherent calibration and no sensors to poison.
Inherent Calibration
The analyzer may calibrated insitu using calibration gas delivered from a dynamic calibrator or cylinder standard. Routine calibration is unnecessary for proper operation.
Targeted Library for Increased Value and Cost-Effectiveness
Contains 1 multi-purpose standard library suitable for monitoring of 23 compounds. Custom calibrations are available based on application. Additionally, ancillary sensors can be added for detection of other gases not available with UV-DOAS, such as Carbon Dioxide, Carbon Monoxide, Methane, and more.
UV SCOUT Common Target Gases
| 1,3 Butadiene C4H6 |
| Acetaldehyde C2H4O |
| Acetone CH3COCH3 |
| Acrolein C3H4O |
| Ammonia NH3 |
| Benzene C6H6 |
| Carbon Disulfide CS2 |
| Chlorine Cl2 |
| Chlorine Dioxide ClO2 |
| Ethyl Benzene C8H10 |
| Formaldehyde CH2O |
| Hydrogen Sulfide H2S |
| Isoprene C5H8 |
| Mercury Hg |
| Naphthalene C10H8 |
| Nitric Oxide NO |
| Nitrogen Dioxide N2O |
| Nitrous Acid HNO2 |
| Oxygen O2 |
| Ozone O3 |
| Phenol C6H5OH |
| Styrene C8H8 |
| Sulfur Dioxide SO2 |
| Toluene C6H5CH3 |
| Trimethylbenzene C9H12 |
| O-Xylene, M-Xylene, P-Xylene C8H10 |
*NOTE: For detection of gaseous compounds not available within the UV spectrum, we recommend the Cerex AIR SENTRY – an open-path analyzer that uses FTIR (Fourier Transform Infrared).
Software
Results You Can Rely On
Cerex recognizes that detailed gas monitoring results need to be reliable and available quickly to various stakeholders. Consequently, Cerex engineers developed software to accurately detect and display gases within the air, in real-time, from any location.
With a Cerex SCOUT, a user can see results on the analyzer itself, or remotely via a phone, tablet, or computer anywhere in the world via a virtual connection. GPS and cellular configurations make this possible in isolated environments.
All data is automatically saved in an easy to access .csv file; this feature helps our clients in various ways - from daily use to crucial events such as evidence in court. Early detection translates into quicker response times, reduced environmental impact, decreased plant downtime, and reduced exposure to site personnel and the community.
Real time spectral subtraction and synthetic background implementation allow the UV Hound and Micro Hound to clearly display accurate concentrations of target gases over 1000 meters without interference from other gas species
Applications
Mount permanently for your outdoor or indoor applications
All Applications
Ambient Air Monitoring
Refinery Fenceline Monitoring of Benzene, Toluene, and Xylenes (BTEX)
Brownfield Remediation
Chemical Depot Monitoring
Chlorine Monitoring
Environment Contamination and Remediation
"The HON" EPA Rules for Benzene, 1,3-Butadiene, Chloroprene
Indoor Air Safety Monitoring (Fixed)
Industrial Hygiene
Leak Detection and Repair (LDAR) Inspection
Manufactured Gas Plant Remediation (MGP)
Perimeter Ambient Monitoring System (PAMS)
Superfund Site Remediation
Tank Farm Monitoring
