
Gas analyzers
SIRA CH₄ Low
Continuous measurement of trace amounts of methane in exhaust gases
The SIRA CH₄ low is a stationary indoor analyzer for real-time measurement of methane in low ppm concentrations in exhaust gas streams. The methane concentration is precisely determined using an infrared Harriot cell.
Due to the new EU methane regulation, the monitoring of methane in exhaust gases is becoming increasingly important. With the SIRA CH₄ low, methane levels in a wide variety of exhaust gases can be detected quickly, reliably and with high precision – a decisive contribution to compliance with regulatory requirements and process optimization.
Thanks to its customizable measuring frequency, extensive configuration options and virtually maintenance-free design, the SIRA CH₄ low offers an exceptional combination of flexibility, process safety and long-term reliability.
| Parameter | Wert |
|---|---|
| Betriebstemperatur | 0–40 °C |
| Atmosphärischer Druck | 860–1160 mbar |
| Relative Luftfeuchte | 5–95 %, nicht kondensierend |
| Netzspannung | 115–240 V AC |
| Überwachte Substanzen | Methan (CH4) |
| Messbereich | 0–5000 ppm (höhere Konzentrationen auf Anfrage verfügbar) |
| Maximaler Messfehler | 10 ppm oder 5 % des Messwertes (je nachdem, welcher Wert größer ist) |
| Wiederholbarkeit (Standardabweichung) | < 1/5 der Fehlertoleranz |
| Analysezeit | < 3 min |
| Empfohlenes Kalibrierintervall | 12 Monate |
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.