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Crowcon Tetra Multigas Monitor
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Manufacturer: CROWCON INSTRUMENTS
Mfr. Part Number: Tetra
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Tetra, is a unique mulitgas monitor for the detection of flammable gases, oxygen and toxic gases; Tetra offers flexibility, assurance, robustness and real value for money. Intrinsically safe, Tetra is the only portable gas detector with embedded software designed to the exacting requirements of IEC 61508-3 guaranteeing reliable and dependable operation.
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Up to four gases measured
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Digital interchangeable i-module sensors for full flexibility
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Loud 94dBA audible alarm with selectable tones
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Unique dual color red/blue visual alarm
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Built in vibrating alarm as standard
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Rugged and robust, IP65 ingress protection
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Simultaneous 4 gas display with automatic backlight
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Peak mode operation
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TWA reading recall
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Data & Event logging
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Simle IP interface to PC
Typical ranges and alarms:
| Gas
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Range
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Alarm UK
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Alarm US
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| Flammable
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0-100%LEL
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20%LEL
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10%LEL
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| Oxygen
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0-25%
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19/23%
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19.5/23.5%
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| Hydrogen Sulphide
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0-100ppm
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5ppm
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10ppm
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| Carbon Monoxide
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0-500ppm
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30ppm
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35ppm
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| Sulphor Dioxide
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0-20ppm
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1ppm
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2ppm
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| Chlorine
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0-20ppm
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0.5ppm
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0.5ppm
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| Nitrogen Dioxide
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0-20ppm
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1ppm
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3ppm
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| Ammonia
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0-100ppm
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25ppm
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25ppm
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| Ozone
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0-1ppm
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0.1ppm
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0.1ppm
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| Hydrogen
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0-1000ppm
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N/A
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N/A
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| Hydrogen Cyanide
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0-25ppm
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5ppm
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5ppm
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| Hydrogen Fluoride
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0-10ppm
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1ppm
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1ppm
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| Phosphine
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0-5ppm
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0.2ppm
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0.2ppm
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| Fluorine
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0-1ppm
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0.1ppm
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0.1ppm
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| Phosgene
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0-1ppm
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0.1ppm
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0.1ppm
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Required ranges and alarms may vary by country and application and these can be configured as required. Each gas channel can have two instantaneous alarm levels set. Toxic channels also have Time Weighted Avereage alarms. Flammable gas calibration is available for methane, propane, butane, pentane, hydrogen and ethylene as standard. Tetra is also available in non-certified CO, option replacing the flammable sensor.
Typical Response Time: Flammable 20s, Toxic gas 20s, Oxygen 10s
Audible alarm: 94dB @ 30cm; Multiple alarm sounds allow selection of distinctive tones for different alarm levels
Visible alarm: Dual color red/blue flashing LED pair in gas hazard
Vibrating alarm: Internal vibrating alarm
Datalogging: Timed datalogging: 50 hours at 1-minute data rate; Event logging:>1500 events
Operating Temp. Range: -4F to 131F Toxic and Oxygen sensors are not rated for continuous operatoin at high temperatures
Humidity: 20-90% RH
Ingress Protection: IP65
Approval codes: Europe: EN60079-0, EN60079-11, EN60079-1, 94/9/EC; USA/Canada: UL913, CSA22.2, 152;
Operation Standards: EN50270, EN50271, IEC61508, EN61779, EN45544
PC interface: IR link for RS232 connection, USB/RS232 Converter available. Portables PC software package provides full configuration control, calibration and access to the Data and Event files
Calibration: Tetra can be routinely calibrated manually using hte menu, using Portables PC Software or automatically using Checkbox IMH
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