Volatile Organic Compounds Analyzer BTEX

VOC72M

The VOC72M’s metrology, in accordance with EN 14662-3 (2005) & EN 15267-1 (2009) standard for benzene measurement, is based on gas chromatography (GC) coupled with a photo-ionization detector (PID).

Compact and fully automated analyser providing equal performance to the laboratory chromatographs; particularly well-suited for fixed or mobile ambient air quality monitoring stations.

Standard measured compounds: Benzene, Toluene, Ethylbenzene, m+p-Xylene, o-Xylene, 1-3 Butadiene (other compounds on request)

Quick check of the chromatograms possible directly on-screen, without the use of a computer

Standard measured compounds: Benzene, Toluene, Ethylbenzene, m+p-Xylene, o-Xylene, 1-3 Butadiene…
Performs all the functions, such as: sampling, analysis and data management, in a simple and completely autonomous mode
Self-contained, completely automated and ready to use in less than 30 minutes

GC column equipped with an innovative liquid-cooler; retention times are stable even with a fluctuating temperature
Long-life capillary column
High sensitivity, stable and linear response PID detector

Ultrafast trap heater (heating rate >160°C/second)
Quick check of the chromatogram peaks possible directly on-screen, without the use of a computer
Low memory effect allowing the automatic calibration of the analyser on a single cycle without an external PC
Carrier Gas : N₂ (Nitrogen)

Ambient air monitoring
Monitoring of industrial sources emitting VOCs

Photochemical pollution studies (stationary and mobile laboratories)
Other compounds on request: hexane, trimethylbenzene, i-octane, styrene…

Technical specifications
Measured parameter	VOC (Benzene, Toluene, Ethylbenzene, m+p-Xylene, o-Xylene, 1,3 Butadiene)
Technology	Gas Chromatography
US-EPA Approval / QAL 1 Certification	YES
Measurement ranges	up to 1000 µg/m³ maximum factory standard range for benzene: 90 µg/m³, user-selectable up to 180 µg/m³ (higher range possible on request)
Measurement units	ppb, ppm, µg/m³ (user-selectable)
Noise (σ)	≤ 0.025 µg/m³ at 0.5 µg/m³ benzene
Lower Detectable Limit (2σ)	≤ 0.05 µg/m³ benzene
Zero drift	≤ 4% / 15 days
Span drift	< 1% / 7 days
Sample flow rate	50 ml/min
Temperature range	0°C to +30°C
Data storage	1 year
Included I/O	1LAN / 1USB / WIFI / RS232-422
Weight (Kg)	12.5
Dimensions mm (LxWxH)	483 x 606 x 133
Chassis	19″ Rack, 3U
Power supply	‘100~250Vac, 50/60Hz + ground

MAIN OPTIONS:

ESTEL 2 max electronic boards with:
4 independent analog inputs (0-2.5 V) / outputs (0-1 V, 0-10 V, 0-20 mA, 4-20 mA)
4 remote control inputs
6 dry contacts
RS232 or RS422 serial interface (max. one Estel board if this option is used)
Span gas input (atmospheric pressure)
Span gas input under pressure (1 bar) for permanent connection to a gas cylinder

COMPLIANCE WITH: