Hand held Multi-Gas Alert Monitor
Intrinsically Safe Rated

Multi-Gas Detector H2S, CO, O2 & %LEL
Continuous monitoring for 4, 3 or 2 hazardous gases, 
GasAlertMax sets the standard for ease of use, reliability and effective protection. 

gas alert monitor

Features of Gas Alert Monitor

  • Integrated sampling pump (see also GasAlertMicroClip-no pump costs less)
  • SmartSample technology and powerful diaphragm pump provide reliable block detection and consistent, uniform flow
  • Easy-to-read, multi-language LCD displays all four gas concentrations (H2S, CO, O2 and combustibles) simultaneously
  • Visual, vibrating and audible alarm indicators
  • Low, High, TWA (time weighted average) and STEL (short-term exposure limit) alarms
  • LCD icons help with fast and easy notification of detector operation
  • Built-in concussion-proof boot
  • Simple auto-calibration procedure
  • Rechargeable batteries provide enough power for a 13-hour shift
  • Best in class block detection with semi-conductor pressure sensor
  • Easy, one-button interface for simple operation
  • Flexible user options minimize training
  • Tamper-proof field operation
  • Multi-language support in English, French, German, Spanish and Portuguese
  • Compatible with MicroDock II automated test and calibration system

The NEW GasAlertMax XT II portable and multi-gas detector simultaneously monitors and displays up to four gases including hydrogen sulfide (H2S) carbon monoxide (CO), oxygen (O2) and combustibles (%LEL). The compact and field tough GasAlertMax XT IIfeatures a non-intrusive integrated sampling pump designed for performance, reliability and ease-of-use. SmartSample pump technology improves remote sampling result accuracy and ensures a consistent, uniform flow. One-button operation guarantees ease of use even while wearing gloves. Tamper-proof, user adjustable options enable the instrument to be customized to suit your specific application.

Larger, User-Friendly LCD
GasAlertMax XT II is equipped with a high-definition LCD. The display shows all current conditions and advises the user when automatic functions are taking place. The alphanumeric LCD keeps you advised of any gas hazard present. The backlight illuminates automatically in low light conditions and in all alarm conditions. The backlight also activates on demand.
Audible/Visual Gas Alarms
Audible (95 dB) alarms and visual alarms activate, ensuring maximum protection. Visual alarms feature the unique wide-angled alarm bar and flashing screen icons that advise alarm level and type (LOW - TWA - HIGH - Multiple Gas). The LCD gas icon fl ashes to advise which gas hazard is present. 

In Low Alarm, the audible alarm sounds in a slow repeating pattern and the visual alarm LEDs fl ash in sync.
TWA (Time Weighted Average) and High Alarm conditions feature urgent, rapid audible/visual patterns. Alarm levels are field-settable.

Auto ON Functions
GasAlertMax tests all features and functions each time it is turned on, ensuring the instrument is ready for use. 
  • The sensors, battery and data card are tested.
  • The oxygen sensor is calibrated automatically
  • Current alarm set-points are displayed.
    All display elements, the backlight and audible/visual alarms are activated.
  • Current time, day and date are displayed on user-downloadable data-logger models (-DL2).
Automatic Sensor Calibration
Auto zero the sensors, at any time, without calibration gas. Calibrate one or all four sensors automatically. Simply apply gas when the flashing Auto Span icon lights.

GasAlertMax XT IItests the calibration gas applied. If the calibration gas does not meet expected parameters, the instrument exits Calibration Mode to prevent improper calibration. All the previous calibration data is retained.
High Efficiency Sampling Pump
GasAlertMax XT II is equipped with a high-efficiency, motorized sampling pump. The rotary vane design provides the benef ts of a small turbine - greater reliability with less friction - and the pump is not pressure sensitive. The detector will automatically advise if the pump or sampling hose is blocked.
Status at a Glance:
Information and guidance is
provided clearly and quickly
by the GasAlertMax: 


Alarm Advice: The alarm icons will light to advise the gas level and alarm type encountered: LOW, HIGH or TWA gas alarms.
TWA alarm overrides a LOW alarm, and a HIGH alarm overrides a TWA alarm.
Battery Level: The battery condition is continuously tested and displayed.
Data-logging Advice: The data card icon lights if the data card is present and functioning.
Auto Pump Re-Calibration: Sampling pump calibration is automatic.
Additional Features and Functions User Field Options
  • Two (2) levels of alarm for each gas sensed.
  • Low battery warning provides a 30-minute alert.
  • GasAlertMax cannot be accidentally shut off.
  • Missing sensor alarm advises which sensor is missing.
  • LEL sensor over range alarm protection.
  • Gas alarms take priority over all other alarms.
  • 2-year warranty on all sensors.
  • Field Upgrade 2 and 3-gas detectors can be upgraded in the field to a 3 and/or 4-gas detector.
  • Select any or all of the following:
    Con. dence Beep - the detector beeps every 5 seconds when selected on start-up.
  • Pass Code Protection - restricts access to calibration and alarm setpoints functions.
  • Latched Gas Alarms - Audible/Visual Alarms will continue to sound until the alarm is acknowledged.
  • Change Time and Date - change the time and date on
    user-downloadable detectors (-DL2) in the field if required.

Classified to US and Canadian Standards by CSA: Class I, Div. 1, Groups A, B, C, D. Class I, Zone 0, Gr. IIC
ATEX Certified by LCIE, CE g II 2 G, EEx ia d IIC 
CE Declared for European Conformity
Australia: Ex ia s IIB
Combustible Gas Performance Certified to:ANSI/ISA-S12.13, CSA C22.2 No. 152
EMI/RFI:Complies with EMC Directive 89/336/EEC

Multi-Gas Detector with Internal Sampling Pump Available with  2, 3 and 4-gas detectors
Gas:  H2S   CO O2 (% byvol.)  Combustibles
Measuring Range: 0 - 200 ppm  0 - 1000 ppm  0 - 30.0%  0 - 100% LEL
Resolution 1 ppm 1ppm 0.1% 1%
Low Alarm Level 1: 10 ppm  35 ppm  19.5%  10%
TWA alarm level 1: 10 ppm 35 ppm N/A  N/A
High alarm level 1: 15 ppm 200 ppm 23.5%  20%
Auto Zero:   Yes
Calibration:   Automatic
Backlight   Low light (auto) alarm conditions (auto) and on demand
Full function self-test:   Verifies: integrity of sensor, battery and circuitry; audible/visual alarms
Sensor:   Plug-in, electrochemical cells (H2S/CO TWIN TOX, O2); catalytic bead (LEL)
Sampling pump   250 ml/min
User's field options:    Confidence Beep, Pass Code Protection, Latching Alarms, Sensor Disable.
 DL2 models only: . field-settable real-time clock and calendar.
INDICATORS AND ALARMS:    Clearly advises alarm levels both visually and audibly
Visual gas alarm   Flashing, wide-angled alarm lens with dual red LEDs plus alarm LCD readout
Audible gas alarm:   High-output, variable, pulsing siren 95 dB at 1 ft. (0.3 m)
Other:   Low battery, Off warning, Sensor fail, Multiple gas hazard, Data card fail
Remote jack   Accepts vibrating alarm, or remote audible/visual alarm (110 dB) or earphone
LCD DISPLAY:    Continuous, alphanumeric gas readout and status display:
Gases monitored:   H2S, CO, O2 and LEL
Gas ppm or %:   Simultaneously and continuously displays gas concentrations present
TWA ppm or %:   Records and displays TWA exposure(s) on demand
Peak ppm or %   Records and displays peak exposure to gas and on demand
Setpoints:   Displayed on activation (auto) and on demand in ppm or %
TESTS:  Audible/visual alarms on activation, sensors, battery, pump
and circuitry (continuous)
Self-test:    Full function self-test on activation (auto)
Battery:   Continuous (auto)
GENERAL SPECIFICATIONS:   Shock-resistant ABS enclosure
Operating temperature:   -20 to +50°C (-4 to +122°F)
Humidity:   10% to 100% RH (non-condensing)
Battery:   One 3.6 volt Black & Decker VersaPakTM rechargeable cell
Battery life:   NiMH up to 12 hours operation; NiCd up to 8 hours operation
Size:   5.1 x 2.8 x 2.0 in. / 13.1 x 7.0 x 5.2 cm
Weight:  11.1 oz. / 316 g
Data recorded:   All events and occurrences
Sampling rate:   One reading every 5 seconds (standard)
Storage:    Over 4 months (based on a normal workweek). Scalable up to one year.
 32 MB Flash MMC (MultiMediaCard) standard
WARRANTY:   2 years including sensors


Ordering Information
Topac Part Number Description Price US$
4 gases
XT-XWHM-Y-NA (4 gases) H2S, CO,O2 and LEL $885.00
3 gases
XT-XWH0-Y-NA (3 gases) %LEL, O2, CO $835.00
XT-XW0M-Y-NA (3 gases) %LEL, O2, CO2 $835.00
XT-X0HM-Y-NA (3 gases) O2 H2S CO $835.00
XT-0WHM-Y-NA (3 gases) %LEL, H2S, CO $835.00
2 gases
XT-XW00-Y-NA (2 gases) %LEL, O2 $785.00
XT-00HM-Y-NA (2 gases) H2S, CO $785.00
XT-X0H0-Y-NA (2 gases) O2, H2S $785.00
XT-X00M-Y-NA (2 gases) O2, CO $785.00
XT-0WH0-Y-NA (2 gases) %LEL, H2S $785.00
XT-0W0M-Y-NA (2 gases) %LEL, CO $785.00
Single Gas
XT-X000-Y-NA (1 gas) O2 $745.00
XT-0W00-Y-NA (1 gas) %LEL $745.00
XT-00H0-Y-NA (1 gas) H2S $745.00
XT-000M-Y-NA (1 gas) CO $745.00
XT-CK-DLconfined space kit Confined Space Kit - Deluxe
conveniently holds your gas detector and everything you need for safe sampling in confined space entry work. Includes Concussion-Proof Boot; Carrying Holster; IR Connectivity Kit; 1 ft. / 0.3 m Sample Probe; 10 ft. / 3.3 m sampling hose and 3 ft. / 1 m calibration hose, both with quick-connector fitting; 0.5 LPM regulator; and space to hold your detector kit and one 34 L calibration gas cylinder (gas not included )
XTCAL Kit - 4 Gas + Hose + regulator Calibration Kit $425.00  
GABXT Boot with belt clip $35.00 -
GAPROB1 Sample hose/probe 3 ft $30.00 -
GAVPA1 Vehicle power adaptor $25.00 -
GAPA3 Wall power adaptor $35.00  
MicroDock2datalogging station Data logging and calibration station    

Topac Inc. 231 CJC Highway, Suite 103 Cohasset MA 02025 USA
Tel: 781 740 8778 Fax: 781 740 8779

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