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XP 311 II Gas Detectors

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Simple, large button operation, analog gas reading at a glance makes the XP-311 the easiest detector to use on the market.
Based on the proven and successful previous version, the XP-311 is designed to be more affordable. It is the perfect detector to meet the safety monitoring requirements of many industries

  • Low battery, sensor & pump error alarm
  • High / Low range changeover switch
  • Automatic sampling by built-in pump
  • Automatic zero adjustment function
  • Remaining battery level indication
ModelXP-311 II
Detectable gasCombustible gas
Detection principleCatalytic combustion
Gas sampling methodAutomatic sampling by built-in pump
Detection range0 to 100% LEL
Indication accuracy *1±5% LEL of full scale value
Alarm set value20% LEL
Alarm methodBuzzer sounds and red lamp flashes at gas alarm.
Power supply *2Four AA alkaline batteries (LR6) or manganese batteries (R6PU or R6P)
Continuous operating time *3AA alkaline batteries (LR6), 20°C, no alarm, backlight OFF: General: Approx. 10 hours Methane: Approx. 8 hrs.
Response time *430 s max. (90% response)
Operating temperature and humidity range-20 to 50°C, 95% RH max. (with no condensation)
Explosion-proof structureEx ibd II BT3 (intrinsically safe and flame-proof design) *5
Main functions* Zero adjustment (Automatic zero adjustment for the sensor can be performed at startup and as required.)
* Buzzer stop (The buzzer can be stopped using a switch when it sounds.)
* Backlight (The backlight can be turned ON using a switch.)
DimensionsApprox. W79 x H161 x D43.5 mm (excluding protrusions)
WeightApprox. 480 g (including batteries)
AccessoriesSoft case, shoulder belt, AA alkaline batteries, attachment (AT-2), Drain Filter (DF-112), two replacement Filter Elements
Optional items1-m gas sampling hose (with Drain Filter and sampling pipe)



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