Typical measuring ranges Range Alarm
and alarm settings Flammable gas 0 – 100% LEL 20% LEL
(up to four gas Oxygen 0 – 25% 19% & 23%
measurement channels Hydrogen sulphide 0 – 50 ppm 10 ppm
and three levels of alarm) Carbon monoxide 0 – 500 ppm 35 ppm
Sulphur dioxide 0 – 10 ppm 2 ppm
Chlorine 0 – 5 ppm 0.5 ppm
Nitrogen dioxide 0 – 10 ppm 2 ppm
Phosphine 0 – 5 ppm 0.5 ppm
Ammonia 0 – 50 ppm 25 ppm
Hydrogen (non- 0 – 2000 ppm –
flammable levels)
Hydrogen cyanide 0 – 25 ppm 10 ppm
Hydrogen chloride 0 – 10 ppm 5 ppm
Ozone 0 – 1 ppm 0.5 ppm
Other sensors available
Typical response times Methane 20 s, Oxygen 10 s, Typical toxic gas 20 s.
Expected sensor life Flammable 5 years, Toxic 3 years, Oxygen 2 year
minimum.
Audible alarms Wailing, omni-directional siren, 101 dBA @ 1 metre.
Confidence blip (selectable).
Continuous tone for low battery.
Visible alarms Four large, top-mounted red LED clusters andsingle red LED on control panel.
In alarm mode LED clusters flash two at a time inquick succession and red LED lights on thoseDetectives sensing the hazard.
LED clusters of linked Detectives flash more slowly.Slow flashing green LED indicates normal working.Rapid flashing green LED indicates low battery.