
Gas analyzers
SIRA UV VOC
The SIRA UV VOC is a stationary indoor analysis tool for real-time quantification of volatile organic compounds (VOCs) based on state-of-the-art UV spectroscopy. VOCs occur in a variety of industrial process gases – including biogas, natural gas, exhaust air streams and gases from waste and wastewater treatment.
Due to strict emission regulations, potential health risks and the danger of negative effects on downstream processes, efficient VOC removal is of central importance. Cleaning is usually carried out via adsorption on activated carbon filters. These filters must be continuously monitored in order to detect breakthroughs at an early stage, ensure process integrity and comply with legal requirements.
The SIRA UV VOC offers a highly reliable and versatile solution for this. The system is characterized by:
Continuous real-time monitoring of the VOC concentration
Customizable configuration for different process requirements
Virtually maintenance-free operation
Robustness and long-term stability for industrial applications
This makes the SIRA UV VOC ideal for operators of biogas plants, natural gas infrastructure, waste treatment processes and exhaust air purification plants that require precise VOC monitoring to safeguard processes, reduce emissions and maximize the service life of activated carbon filters.
| Parameter | Wert |
|---|---|
| Betriebstemperatur | 0–40 °C |
| Atmosphärischer Druck | 860–1160 mbar |
| Relative Luftfeuchte | 95 %, nicht kondensierend |
| Netzspannung | 115–240 V AC |
| Überwachte Substanzen | Flüchtige organische Verbindungen (VOCs) |
| Messbereich | 0–50 mg/m³ |
| Maximaler Messfehler | 1,5 mg/m³ oder 10 % des Messwertes (je nachdem, welcher Wert größer ist) |
| Wiederholbarkeit (Standardabweichung) | < 1/5 der Fehlertoleranz |
| Analysezeit | < 3 min |
The SIRA product series in comparison

SIRA UV THT
Continuous measurement
of the odorant gas concentration

SIRA UV VOC
Measurement of volatile organic compounds (VOCs)

SIRA ROA Premix
Analysis of the residual oxygen content

SIRA CH₄ Low
Continuous measurement
of methane in exhaust gases
Industry applications
These products can be used in the following sectors.

Iron and steel production
Our appliance series have been used in iron and steel production for many decades.

Biogas
Union Instruments products have proven themselves extensively in biogas upgrading plants.

Petrochemicals and refineries
We produce customized and flexible measurement technology solutions for the petrochemical industry and refineries.

Glass and ceramics
Perfectly coordinated appliance technology for glass and ceramic applications that works both safely and economically.

Natural gas
Our INCA multi-gas analyzers provide efficient solutions for processes in natural gas plants.

Generating energy from waste
Our appliance technology makes an important contribution to the functionality of environmentally friendly and energy-saving system concepts.
Service
We clarify administrative and commercial issues for you.
+49 721 680381-30
Support
You can open a support ticket for technical support for your product.
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Distribution
We prepare quotations for you, clarify questions about invoicing and manage your maintenance contract.
+49 721 680381-20
Downloads
Here you will find various downloads to support you.
Brochures, data sheets and application reports – we have all the relevant information for you here.
Industries
Our key application areas at a glance.
We supply a wide range of industrial plants such as steel production, the natural gas industry and biogas producers.
Products
Special products for your industrial application.
Our range includes the INCA, CWD and SIRA product series and the CAM module – combined with top advice and service.