BW Gas Alert Micro 5 Series Multi-Gas Detectors

GasAlertMicro5 PID photo-ionization sensor detects volatile organic compounds or VOCs and can be added to a standard four gas configuration or combined with non-standard combinations of other sensor. Add the attachable/removable sampling pump for confined space entry or remote sampling

Monitor 5 gases simultaneously. Waterproof to 3 ft and has a concussion proof boot with an optional attachable/removable pump.

GasAlertMicro5 portable gas detector simultaneously monitors and displays up to 5 potential atmospheric hazards including oxygen, combustible gases and a range of toxic gases. Compact and lightweight, GasAlertMicro5 adds multi-gas detection to BW Technologies water-resistant line of detectors. Audible, visual and vibrator alarms activate in the event of a low, high, TWA or STEL alarm condition. An optional motorized pump is available.

Beyond features that come standard with BW portable instruments such as confidence beep, full function self test, simple automatic calibration procedure and passcode protection, GasAlertMicro5 includes an extended selection of user-settable field options now including: stealth mode, backlight options, selectable ppm resolution, STEL / TWA measurement choice, combustible/PID correction factor options, user-settable calibration gas concentrations and multi-language support.

Supported Gases:

  • H2S - hydrogen sulfide
  • HCN - hydrogen cyanide
  • CO - carbon monoxide
  • Cl2 - chlorine
  • O2 - oxygen
  • ClO2 - chlorine dioxide
  • SO2 - sulfur dioxide
  • O3 - ozone
  • PH3 - phosphine
  • LEL combustibles
  • NH3 - ammonia
  • NO2 - nitrogen dioxide

What's Included:

  • Batteries: three replaceable alkaline cells or one rechargeable battery pack with the GasAlertMicro 5 Battery Charger (also provided with the GasAlertMicro 5 PID and the GasAlertMicro 5 IR).
  • Sensors: O2, combustible (LEL), toxic, H2S/CO (TwinTox sensor), PID, or CO2
  • Calibration cap and hose
  • Single gas calibration cap
  • Screwdriver
  • Quick reference guide
  • Fleet Manager CD (if applicable)
  • Manual and training CD-ROM

Key Features:

  • Compact (5.7 x 2.9 x 1.5 in. / 14.5 x 7.4 x 3.8 cm) and lightweight (13.1 oz. / 370 g)
  • Rugged, highly water-resistant design.. Continuous LCD shows simultaneous gas concentrations for 5 gases
  • Integral concussion-proof enclosure for the most rugged environments
  • Integral motorized pump option for remote sampling (optional)
  • Two power options: three AA alkaline batteries or a rechargeable battery pack
  • Provides 95 dB alarm tone and two bright wide-angled alarm bars
  • Equipped with internal vibrating alarm for high noise areas
  • Multi-language support in English, French, German, Spanish and Portuguese
  • Three backlight options: standard-activates in low light (auto), in alarm (auto) and reactivates on- demand; alarm only-activates in alarm conditions and reactivates on-demand; stealth mode
  • Four alarm levels: instantaneous Low and High Alarm for all gases; TWA (time weighted average) and STEL (short term exposure limit) for toxic gases
  • Simple automatic calibration procedure; compatible with BW MicroDock II system
  • Records TWA, STEL and maximum exposures to gas and displays readings on command
  • User selectable field options include: confidence beep, pass code protection, latching alarm, calibration due date and "SAFE" display function, stealth mode, selectable ppm resolution for some gases (e.g. SO2 0.1 ppm)
  • Full function self-test of: sensor, battery and circuit integrity; and audible/visual alarms


Gas Measuring range Resolution TWA STEL LOW HIGH
O2 0-30.0% 0.1 N/A N/A 19.5 22.5
CO 0-999 ppm 1 35 200 35 200
H2S 0-100 ppm 1 10 15 10 15
PH3 0-5.0 ppm 0.1 0.3 1.0 0.3 1.0
SO2 0-100 ppm 0.1 2 5 2 5
NO2 0-99.9 ppm 0.1 2.0 5.0 2.0 5.0
HCN 0-30.0 ppm 0.1 4.7 10.0 4.7 10.0
Cl2 0-50.0 ppm 0.1 0.5 1.0 0.5 1.0
NH3 0-100 ppm 1 25 35 25 50
ClO2 0-1 ppm 0.1 0.1 0.3 0.1 0.3
O3 0-1 ppm 0.1 0.1 0.1 0.1 0.1
PID 0-999 ppm 5.0 50 100 50 100
LEL 0-100% LEL
0-5% v/v
1% N/A N/A 10% 20%
Auto zero: Yes
Calibration: Automatic
Backlight: Standard Mode: low light (auto); alarm condition (auto); reactivation on demand
Alarm Only Mode:
alarm condition (auto); reactivation on demand
Stealth Mode: backlight inactive; audible and visual alarms silenced
Full function self-test: Sensor integrity, circuitry and battery; audible/visual alarms
Sensor: Plug-in, electrochemical cell (toxic and oxygen); catalytic (LEL)
User field options: Confidence beep, pass code protection, latching alarms, passed calibration user- lockout option, "SAFE" display function, stealth mode, oxygen auto-cal on start-up, alarm only backlight mode, combustible gas measurement (%LEL or % by volume methane), LCD language option, STEL calculation choice, TWA calculation choice
ALARM INDICATORS: combustible correction factor options, user-settable calibration gas levelClearly advises alarm conditions with audible, visual and vibrator alarms
Visual alarms: Two flashing alarm bars visible from all angles
LCD indicates gas present and alarm levels encountered
Audible alarm: Typically 95 dB at 1 ft./ 30 cm variable pulsed audible alarm
Vibrator alarm: Pulses warning in gas alarm conditions, or for any status alarms
Other: ALARMLEVELS: Low battery, over range, multiple gas / pump and failed or missing sensor Instantaneous Low Alarm for all gases; Instantaneous High Alarm for all gases;
LCD: TWA (time weighted average) and STEL (short term exposure limit) for toxics Continuous, alphanumeric gas readout and status display advises
Gases monitored: H2S, CO, O2, SO2, PH3, NO2, NH3, HCN, Cl2, ClO2, O3, PID and/or combustibles (0-100% LEL or 0-5.0% methane)
Gas concentration: Simultaneously and continuously displays gas concentration(s) for all sensors (in ppm, %LEL, or % v/v)
STEL/TWA ppm or %: Records STEL and TWA exposures and displays on demand
Peak ppm or %: Records and displays peak exposure to gas and displays on demand
Alarm setpoints: Displayed on activation
Calibration due date: In days remaining
Clock: Real-time clock setting displayed on start-up (datalogger models only)
TESTS: Full function self-test: Full function self-test on activation
Battery: Continuous
GENERAL SPECIFICATIONS: Rugged, composite material; two-shot molded polymer case with integral anti-shock boot
Operating temperature: -4 to 122 oF / -20 to 50 oC
Humidity: 0 - 95% RH (non-condensing)
EMI/RFI: Complies with EMC Directive 89/336/EEC
Protection: Highly water resistant and dust proof housing
Battery Options: 14 hrs on three AA alkaline cells (10 hours with optional motorized pump*)
14 hrs on three AA alkaline cells (10 hours with optional motorized pump*)
18 hrs on rechargeable "hot-swappable" battery pack (13 hrs with optional motorized pump*)
*when equipped with oxygen, combustible, TwinTox and one additional toxic sensor
3 hours charge time.
Size: 5.7 x 2.9 x 1.5 in. / 14.5 x 7.4 x 3.8 cm
Weight: 13.1 oz. / 370 g
WARRANTY: Full 2-year warranty including all sensors
DATALOGGER OPTIONS: User-downloadable datalogger
Data recorder: ll events and occurrences (calibration zero adjustment, calibration span adjustment, gas readings, TWA, STEL, alarm condition, failures detected by the microprocessor)
Sampling rate: Factory set at 5-second intervals and user-settable from 1 to 127-second intervals
Storage: 2 months of continuous data via 32 MB Flash MMC card (64 MB and 128 MB cards also available); when full, the wrap-around feature replaces oldest data with most recent data


Fleet Manager II allows you to conveniently manage your gas detectors. Data storage and analysis has never been so simple. With the same look and feel as Fleet Manager, Fleet Manager II allows users to download information directly from BW Technologies or the MicroDock II.

With improved functionality, users can:
  • Automatically create accurate and user-friendly reports
  • Easily sort, format and graph data as well as view history
  • Archive and share data easily, including databases
  • Download and manage calibration and bump check records as well as datalogged information onto any PC
Fleet Manager is compatible with
  • GasAlert Quattro
  • Gasalert Max XT
  • GasAlert Clip Extreme 24 Month
  • GasAlert Clip Extreme 36 Month
  • GasAlert Extreme
  • GasAlertMicro
  • GasAlertMicro 5 Series (Micro 5 IR, Micro 5 PID)
  • GasAlertMicroClip
  • MicroDock II

This gas detector unit has the following replacement sensors available, depending upon individual configuration:

SR-X10-C1 Replacement oxygen (O2) sensor
PS-RH04S Replacement hydrogen sulfide (H2S) sensor
PS-RM04 Replacement carbon monoxide (CO) sensor
PS-RM04H Replacement carbon monoxide (CO) sensor, H2 resistant
PS-RS04 Replacement sulfur dioxide (SO2) sensor
PS-RC10 Replacement chlorine (Cl2) sensor
PS-RZ10 Replacement hydrogen cyanide (HCN) sensor
PS-RD04 Replacement nitrogen dioxide (NO2) sensor
SR-A04 Replacement ammonia (NH3) sensor
SR-V04 Replacement chlorine dioxide (ClO2) sensor
SR-B04 Replacement carbon dioxide (CO2) IR sensor


Ask about this product