• Gas Detectors

Gas Detectors

  • Continuous LCD shows real-time gas concentrations
  • Water-resistant
  • Automatic calibration procedure

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Simultaneously monitor and display up to five atmospheric hazards with the GasAlertMicro 5 Series. 

Adaptable to a variety of applications, the GasAlertMicro 5 Series has an extensive selection of user-settable field options and is available as either a standard toxic gas model, a PID model for the detection VOCs, or an IR model for CO2 detection. Use the passcode function to prevent unauthorized modifications of the instrument’s settings. Compatible with BW’s MicroDock II automatic test and calibration system, the GasAlertMicro 5 Series is unparalleled in its versatility, performance and overall value


Generation 2 pump with visible integrated filter



  • Continuous LCD shows real-time gas concentrations
  • Water-resistant
  • Automatic calibration procedure; compatible with BW
  • MicroDock II automatic test and calibration station
  • Full function self-test of sensor, battery status, circuit integrity and audible/visual alarms on start up
  • Bright wide-angled visual alarm bars 
  • Built-in concussion-proof boot
  • Integral motorized pump option for remote sampling
  • Equipped with internal vibrating alarm for high noise areas
  • Two power options: AA alkaline or rechargeable hot-swappable battery packs 
  • Multi-language support in English, French, German, Spanish and Portuguese


Industrial Applications

GasAlertMicro 5
Industry or ApplicationSources of Additional Hazards
Confi ned Space EntryVarious sources - industrial chemicals 
Wastewater PlantsCl2, NH3, ClO2 from treatment
Steel / Iron ProductionNO2
Pulp and PaperCl2 issu du blanchiment
Food and BeverageNH3 from refrigerants, ice production
PH3  from fumigation
ConstructionConfi ned space entry, trenching, and NO2 from diesel exhaust
Gases DetectedH2S, CO, O2, SO2, PH3, NH3, NO2, HCN, Cl2, ClO2, O3 and combustibles (LEL)
Typical battery life 
AA Alkaline20 hours
Rechargeable20 hours
GasAlertMicro 5 PID
Industry or ApplicationSources of VOC Hazards
Confi ned Space EntryRespiration and aerobic bacterial decomposition
Hazmat / Homeland SecurityDetect fl ammables not detected by LEL sensor (diesel, gasoline vapor, turpentine, etc
Industrial Hygiene and Confined Space

Wide number of potential hazards (benzene, diesel, ethanol, toluene, etc.) dependant on industry

Airlines (wing-tank entry)Jet fuel not detectable by LEL sensor, PID required
LandfillsDecomposing organic matter, emission of chemical compounds
Oil and GasBy-products of refi ning processes
Chemical PlantsNumber of potential hazards dependant on product and process of manufacturing
Gases DetectedVOCs (PID),H2S, CO, O2, SO2, PH3, NH3, NO2, HCN, Cl2, ClO2, O3 and combustibles (LEL)
Typical battery life 
AA Alkaline15 hours
Rechargeable15 hours
GasAlertMicro 5 IR
Industry or ApplicationSources of CO2 Hazards
Confined Space EntryRespiration and aerobic bacterial decomposition
Wineries and BreweriesBy-product of yeast fermentation
AgricultureGreenhouses, mushroom farms use  CO2 to enhance growth; also used to speed ripening of fruits and vegetables, aerobic bacteria in manure pits
Marine Fuel Transport / Shipping and ShipyardsUsed for fi re suppression and inerting cargo holds
Oil Well FracturingInjected into mature wells for further oil extraction
Wastewater TreatmentAerobic bacteria
Food Industry / Cold StorageCO2 solide (dry ice) used as a refrigerant and for carbonation; 
Industrial and Chemical ManufacturingSolid CO2 used in various processes CO2 used in packaging to extend storage shelf life
LandfillsBiodegradation (aerobic decomposition) of waste
Gases DetectedCO2 (IR),H2S, CO, O2, SO2, NH3, O3 and combustibles (LEL)
Typical battery life 
AA Alkaline15 hours
Rechargeable15 hours



Sensor Specifications

GasMeasuring Range (ppm)Default Resolution (ppmHigh Resolution (ppm
TwinTox (H2S)0-5001,00,1
TwinTox (CO)0-5001,0N/A
O20-30,0 %0,1 %N/A
O30-1,00,1 0,01
PID (VOCs)0-1000N/A


0-50 000
0-5,0 % v/v
0,01 %
Combustibles0-100 % LIE 1 % N/A
Gases 0-5,0 % v/v0,1 %

Alarm set points for all sensors are user adjustable. Set point(s) are automatically displayed during instrument start up.



Options et accessories

Integral pump and battery charger 
Confined space kit
 Belt holster
Collapsible sampling probe  
Size4,5 x 7,4 x 3,8 cm (5,7 x 2,9 x 1,5")
Weight13.1 oz. / 370 g

-4 to +122°F / -20 to +50°C 14 to +104°F 

-10 to +40°C (PID)


- Visual, vibrating, audible (95 dB)

- Low, High, STEL, TWA, OL (over limit)

TestsSensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous)
PumpOptional; Sample from up to 66 ft. / 20 m
User Options
  • Confi dence beep
  • Set STEL interval
  • Set TWA method
  • Sensor on/off
  • Latching alarms
  • Safe display mode
  • Stealth mode
  • Adjust Clock
  • Set datalogger rate
  • Passcode protection
  • Correction factor library
  • (LEL, PID)
  • Fast pump
  • Combustible gas
  • measurement (% LEL or
  • % by volume methane)
  • O2 auto calibration on
  • start up
  • Automatic backlight
  • Sleep mode
  • User-settable calibration
  • gas level
  • Calibration due lockout
  • Daily bump test
  • Language choices (fi ve)
  • High resolution
RaitingsEMI/RFI: Complies with EMC Directive 89/336/EEC IP 65/66
Certifications and approvals