Honeywell FS0502098 BW Max XT II Multi-Gas Detector

Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-PRODUCTIntro

The Quick Reference Guide provides basic information to operate the Honeywell BW™ MaxXT II gas detector. For complete operating instructions, refer to the Honeywell BW™ MaxXT II User Manual provided on the Honeywell web site.
The Honeywell BW™ MaxXT II gas detector (“the detector”) is designed to warn of hazardous gas levels above user-defined alarm setpoints.
The detector is a personal safety device. It is your responsibility to respond properly to the alarm.

What’s in the box

  • Detector
  • Rechargeable battery and Battery Charging Adapter
  • 3 ft. / 1 m calibration hose with quick connect
  • 10 ft. / 3 m sampling hose with particulate filter and quick connect
  • Reversible screwdriver
  • Kit of five spare pump filters
  • QRG

Safety Info – Read First

Use the detector only as specified in the manual and quick reference guide, otherwise, the protection provided by the detector may be impaired.

  1. Caution: For safety reasons, this equipment must be operated and serviced by qualified personnel only. Read and understand the user manual completely before operating or servicing.
  2. Charge the detector before first-time use. Honeywell Analytics recommends the detector be charged after every workday.
  3. Calibrate the detector before first-time use and then on a regular schedule, depending on use and sensor exposure to poisons and contaminants. The sensors must be calibrated regularly and at least once every 180 days (6 months).
  4. Calibrate only in a safe area that is free of hazardous gas in an atmosphere of 20.9 % oxygen.
  5. The combustible sensor is factory calibrated to 50% LEL methane. If monitoring a different combustible gas in the % LEL range, calibrate the sensor using the appropriate gas.
  6. Only the combustible gas detection portion of this instrument has been assessed for performance by CSA International.
  7. Protect the combustible sensor from exposure to lead compounds, silicones, and chlorinated hydrocarbons. Although certain organic vapors (such as leaded gasoline and halogenated hydrocarbons) may temporarily inhibit sensor performance, in most cases the sensor will recover after calibration.
  8. Honeywell Analytics recommends that the combustible sensor be checked with a known concentration of calibration gas after any exposure to contaminants/poisons such as sulfur compounds, silicon vapors, halogenated compounds, etc.
  9. Honeywell Analytics recommends bumping test the sensors before each day’s use to confirm their ability to respond to gas by exposing the detector to a gas concentration that exceeds the alarm setpoints. Manually verify that the audible and visual alarms are activated. Calibrate if the readings are not within the specified limits.
  10. Caution: High off-scale LEL readings may indicate an explosive concentration.
  11. Any rapid upscaling reading followed by a declining or erratic reading may indicate a gas concentration beyond upper scale limit, which can be hazardous.
  12. For use only in potentially explosive atmospheres where oxygen concentrations do not exceed 20.9% (v/v).
  13. Extended exposure of the Honeywell BW™ MaxXT II to certain concentrations of combustible gases and air may stress the detector element that can seriously affect its performance. If an alarm occurs due to a high
  14. concentration of combustible gases, recalibration should be performed, or if needed, the sensor replaced.
  15. The BW pump (XT-RPUMP-K1) is certified for use with the Honeywell BW™ MaxXT II only.
  16. Dispose of used lithium cells immediately. Do not disassemble and do not dispose of in fire. Do not mix with the solid waste stream. Spent batteries must be disposed of by a qualified recycler or hazardous materials handler.
  17. Keep lithium cells away from children.
  18. Calibrations and bump tests can be performed using a 0.5 l/min. regulator or a demand flow regulator. If the demand flow regulator is used, it must meet the following maximum inlet pressure specifications:
    1. Disposable cylinders 0-3000 psig/70 bar
    2. Refillable cylinders 0-3000 psig/70 bar
  19. Products may contain materials that are regulated for transportation under domestic and international dangerous goods regulations. Return product in compliance with appropriate dangerous goods regulations. Contact freight carrier for further instructions.


  • Substitution of components may impair Intrinsic Safety.
  • The lithium battery (MX-BAT01) may present a risk of fire or chemical burn hazard if misused. Do not disassemble, heat above 212°F (100°C), or incinerate.
  • Do not use any other lithium batteries with the Honeywell BW™ MaxXT II detector. Use of any other cell can cause fire and/or explosion. To order and replace the MX-BAT01 lithium battery, contact Honeywell Analytics.
  • Lithium polymer cells exposed to heat at 266°F (130°C) for 10 minutes can cause fire and/or explosion.

Parts of the Honeywell BW™ MaxXT II

1Visual alarm indicators (LEDs)
2Pump quick connector
3Pump filter and moisture filter
5Alligator clip
6Charging connector and IR interface
7Diffusion cover locking screw (1)
8Diffusion cover
9Audible alarm
10Liquid crystal display (LCD)

Activating/ Deactivating the detector
To activate the detector, press Button.
To deactivate the detector, press and hold button until the OFF countdown is complete. For information about more button actions, refer to Honeywell BW™ MaxXT II User Manual.
Display Elements

1Alarm condition
2Automatically zero sensor
3Numeric value
4Battery life indicator
5Pump indicator
6Heartbeat indicator
7Gas type identifiers
8Gas cylinder
9Automatically span sensor

Connecting the Gas Cylinder to the DetectorCalibration and Bump Test Installation

Gas Cylinder Guidelines

  • To ensure accurate calibration, use a premium-grade calibration gas. Use gases approved by the National Institute of Standards and Technology.
  • If a certified calibration is required, contact Honeywell Analytics.
  • Do not use a gas cylinder that is past its expiration date.

Gas Cylinder Connection

  1. Verify the calibration gas being used matches the span concentration value(s) that are set for the detector.
  2. Connect the calibration hose to a 0.5 l/min regulator or demand flow regulator on the gas cylinder.
  3. Begin the calibration procedures.
  4. When displays, attach the hose quick connector to the pump quick connector
  5. .When calibration is complete, turn off the gas, and disconnect the hose from the detector and the demand flow regulator.
  6. Ensure the gas cylinder is stored according to the manufacturer’s specifications.


aCautionCalibrate only in a safe area that is free of hazardous gas in an atmosphere of 20.9% oxygen.1. Press and hold ○ as the detector performs the OFF countdown. Continue holding ○when the detector briefly deactivates.Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-44. When   is displayedand           flashes, connect the gas cylinder and apply gas at a flow rate of 250 to 500 ml/min. After a sufficient amount of gas has been detected (approximately 30 seconds), the detector beeps,           is displayed, and flashes while thedetector completes the calibration.
2. The detector activates again and performs the CAL countdown. Continue holding ○ until the countdown is complete to enter calibration.Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-55. The LCD displays CAL DUE. Next, a screen displays showing the number of days remaining before calibration is due for each sensor. The LCD then displays the earliest calibration due date, as some sensors require more frequent calibrations.
3.                 flashes while the detector zeroes all of the sensors. If a sensor fails to auto zero, it cannot be calibrated. When auto zero is complete, the LCD displays APPLY GAS.Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-6Notes:The diffusion cover must be attached to the detector to calibrateDo not calibrate the detector during or immediately after charging is complete.The maximum hose length for calibration is 3 ft. (1 m).Calibration can be aborted at any time. To abort calibration, press . TheCAL ABORTED screen displays.

Refer to the following table for information about alarms and corresponding screens.

Low Alarm•  Slow siren•  Slow alternating flash•  and gas bar flash•  Vibrator alarm activatesHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-9TWA Alarm•  Fast siren•  Fast alternating flash• and target gas bar flash•  Vibrator alarm activatesHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-14
High Alarm•  Fast siren•  Fast alternating flash•  and target gas bar flash•  Vibrator alarm activatesHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-10STEL Alarm•  Fast siren•  Fast alternating flash• and target gas bar flash•  Vibrator alarm activatesHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-15
Multi-Gas Alarm•  Alternating low and high alarm siren and flash•  and target gas bars flash•  Vibrator alarm activatesHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-11Over Limit (OL) Alarm•  Fast siren•  Fast alternating flash• and target gas bar flash•  Vibrator alarm activates•  OL displaysHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-16
Sensor Alarm•  ERR displaysHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-12Automatic Shutdown Alarm•  Sequence of 10 rapid sirens and alternating flashes with 1 second of silence in between (sequence reactivates seven times)•  flashes and vibrator alarm activates•  TURNING OFF displays before deactivatingHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-17
Low Battery Alarm•  Sequence of 10 rapid sirens and alternating flashes with 7 seconds of silence in between (continues for 10 minutes)•           and  flashes•  LOW BATTERY displays, and the vibrator alarm activates•  After 10 minutes of the Low Battery alarm, the Automatic Shutdown Alarm sequence begins•  TURNING OFF displays before deactivatingHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-13 Pump Alarm•  Two beeps and two flashes•  Fan symbol and  flashes•  HIGH displays•  The vibrator alarm activatesHoneywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-18
Note: If enabled, during an alarm condition the Latched Alarms option causes the low and high gas alarms (audible, visual, and vibrator) to persist until the alarm is acknowledged (by pressing ) and the gas concentration is below the alarm setpoint. The LCD continues to display the high peak concentration until the alarm condition no longer exists. Refer to User Manual to enable/disable Latching Alarms. Local regulations may require the Latching Alarms option be enabled.

Options Menu

The detector, IR Link adapter, and Safety Suite Device Configurator software are required to define options. Refer to the Honeywell BW™ MaxXT II User Manual and Safety Suite Device Configurator Operator’s Manual provided on the Honeywell web site.
For user and sensor options, refer to the following:
Device Configuration

  • Startup Message Top Line: Enter a line of text to display on the LCD during startup (maximum 25 characters).
  • Startup Message Bottom Line: Enter a line of text to display on the LCD during startup (maximum 25 characters).
  • • Lockout on Self-Test Error (sensor alarm lock): If a sensor fails during startup and the Lockout on Self-Test option is enabled, Safety Lock On displays on the LCD and the detector deactivates.
    • Safe Mode: If enabled, SAFE displays continuously on the LCD unless an alarm condition occurs.
    • Confidence Beep: If enabled, the confidence beep provides continuous confirmation that the detector is operating correctly. To define how often the detector beeps (every 1-120 seconds), enter the value in the Confidence Interval field. Confidence beep is automatically disabled during a low battery alarm.
    • Latching Alarms: Enable to ensure an alarm persists until the alarm is acknowledged and the gas concentrations are below the alarm setpoint. The audible alarm can be temporarily deactivated for 30 seconds by pressing ○, but the LCD continues to display the high peak concentration until the alarm condition no longer exists.
    • Force Calibration: If enabled, the detector must be calibrated if a sensor is overdue upon startup. User defined (0- 365 days) in the Calibration Interval field.
  • Cal IR Lock (must use IR device to calibrate): If enabled, the detector automatically auto zeros, but the sensors must be spanned using the IR Link or IntelliDox .
    Force Bump: If enabled, a bump test must be performed to ensure the sensor(s) are responding correctly to the test gas. User defined (0-365 days) in the Bump Interval field.
  • • Location Logging: If enabled, a series of numbers (1-999) can be entered on the detector to identify gas wells, plants, and other areas that identify the location where the detector is being used.
    • Force Block Test: If enabled, a pump block test must be performed during the startup tests.
    • Datalog Interval (seconds): Define how often the detector records a sample (every 1-120 seconds).
    • Confidence Interval (seconds): Define how often the detector beeps (1-120 seconds) when the Confidence Beep option is enabled.
    • Language: The LCD displays the screens in English, Français (French), Deutsch (German), Español (Spanish), or Português (Portuguese). Select the language from the drop-down menu in Safety Suite Device Configurator software.

Sensor Configuration (H2S, CO, LEL, and O2)

  1. • Sensor Disabled: Enables/disables the selected sensor.
    • Calibration Gas (ppm): Define the span gas concentration for each sensor. The span gas concentration must match the span value on the gas cylinder.
    • Calibration Interval (days): Define the number of days (0-365) when the next calibration is due.
    • Bump Interval (days): Define the number of days (0-365) when the next bump test is due.
    • Low Alarm (ppm): Define the low alarm setpoint for each sensor.
    • High Alarm (ppm): Define the high alarm setpoint for each sensor.
    • TWA Alarm (ppm): Define the time-weighted average (TWA) alarm setpoint (toxic sensors only).
    • STEL Alarm (ppm): Define the short-term exposure limit (STEL) alarm setpoint (toxic sensors only).
    • STEL Interval (minutes): Define the short-term exposure limit (STEL) from 5-15 minutes (toxic sensors only).
  2. TWA Period (hours) TWA moving average (hours): The TWA Period option is used to define a time-weighted moving average of accumulated gases over a period of 4-16 hours, to ensure the worker leaves the area when the defined maximum average is accumulated.
    Correction Factor (%): Enter the compensation factors for hydrocarbons other than methane. The factor can only be applied if the LEL sensor has been calibrated with methane (LEL only).
  3. • 50% LEL = (%CH4): Enter a percentage value to display the LEL reading as %vol., assuming a methane environment (LEL only).
    • Auto-Zero on Startup: Enable/disable the detector to automatically zero the sensor(s) during startup (H2S, CO, LEL, and O2).
    • LEL by Volume CH4: If enabled, the detector operates assuming a methane (CH4) calibration. Enable to read and display %CH4 values. Disable to read and display % LEL values.
    • 5% LEL Over-span: If enabled, the detector automatically over-spans the LEL sensor by 5% LEL above the span gas concentrations to ensure the detector is in compliance with CAN/CSA C22.2 No. 152.
    • 20.8% Base Reading: When enabled, the detector is configured to detect 20.8% O2 as ambient air. When disabled, the detector is configured to detect 20.9% O2 as ambient air.
    • Low Alarm Acknowledge: If enabled, the audible alarm can be temporarily disabled during a low alarm by pressing ○. The vibrator, alarm LEDs, and LCD remain operational (toxic and LEL only).


To maintain the detector in good operating condition, perform the following basic maintenance as required.

  • • Calibrate, bump test, and inspect the detector on a regular schedule.
    • Maintain an operations log of all maintenance, bump tests, calibrations, and alarm events.
    • Clean the exterior with a soft damp cloth. Do not use solvents, soaps, or polishes.
    • Do not immerse the detector in liquids.

WEEE Directive and Battery Directive

This symbol indicates that the product must not be disposed of as general industrial or domestic waste. This product should be disposed of through suitable WEEE disposal facilities. For more information about disposal of this product, contact your local authority, distributor or the manufacturer.

Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-19

Factory Calibration Certificate
We are committed to providing quality product. This instrument has undergone rigorous testing throughout its manufacture. This is the final report by the people that take pride in the products they build. This instrument has been factory inspected, tested, and calibrated in accordance with the conditions and requirements of our registered Quality System, Operating Standards, and Sales Agreements. All calibration gases are traceable to a known national standard. Refer to your product user manual to determine the recommended calibration frequency.

Charging the Detector

Charge only in a safe area that is free of hazardous gas and within temperatures of 32°F to 113°F (0°C to 45°C). Do not calibrate during or immediately after charging. The charging adapter is specific to your region. Use of the charging adapter outside your region will damage the charger and the detector. Charge the battery after each workday. To charge the battery, refer to the following procedures and illustration:

  • Deactivate the detector.
  • Insert the charging adapter plug into an AC outlet.
  • Connect the charging adapter to the detector IR interface.
  • Charge the battery for 6 hours.
  • To reach full battery capacity, allow a new battery to fully charge and discharge three times.Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-20

For more information about Charging the Detector refer to Honeywell BW™ MaxXT II User Manual provided on the Honeywell web site.


  • Instrument dimensions: 13.1 x 7.0 x 5.2 cm (5.1 x 2.8 x 2.0 in.)
  • Weight: 328 g (11.6 oz.)
  • Operating temperature: -20°C¹ to +50°C (-4°F to +122°F)
  • Storage temperature: -40°C¹ to +60°C (-40°F to +140°F)
  • ¹Standard release data. This product has extended characteristics. For specifications refer to EAC Ex certificate and Pattern Approval document.
  • Operating humidity: 10% to 100% relative humidity (non-condensing)
  • Dust and moisture ingress: IP66/IP67
  • Alarm setpoints: May vary by region and are user-defined
  • Detection range:
  • H2S: 0 – 200 ppm (1 ppm increments)
  • CO: 0 – 1000 ppm (1 ppm increments)
  • O2: 0 – 30.0% vol. (0.1% vol. increments)
  • Combustible (LEL): 0 – 100% (1% LEL increments) or 0-4.4% v./v CH4
  • Sensor type:
  • H2S, CO, O2: Single plug-in electrochemical cell
  • Combustibles: Plug-in catalytic bead.
  • O2 measuring principle: Capillary controlled concentration sensor.
  • Alarm conditions: TWA alarm, STEL alarm, low alarm, high alarm, multi-gas alarm, over limit (OL) alarm, low battery alarm, confidence beep, automatic deactivation alarm, and pump alarm.
  • Audible alarm: 95 dB+ at 30 cm variable pulsed beeper with full battery charge.
  • Visual alarm: Red light-emitting diodes (LEDs).
  • Display: Alphanumeric liquid crystal display (LCD).
  • Backlight: Activates upon startup and when the pushbutton is pressed; deactivates after 10 seconds.
  • Also activates during an alarm condition and remains lit until alarm ceases.
  • Self-test: Initiated at activation and tests continuously.
  • Calibration: Automatic zero and automatic span.
  • User field options: Startup message, lockout on self-test error, safe mode, confidence beep, latching alarms, force calibration, cal IR lock, force bump, location logging, force block test, set datalog interval, set confidence interval,
  • language selection.
  • Sensor options: Sensor enable/disable, set span calibration values, set calibration interval, set bump interval, set alarm setpoints, set STEL interval, set TWA period, auto zero at startup enable/disable, 5% over span, low alarm
  • acknowledge, oxygen measurement, and combustible gas measurement.
  • Battery operating time: One rechargeable lithium polymer: 13 hours (typical).
  • Year of manufacture: The detector’s year of manufacture is determined from the serial number. The second and third number after the second letter determines the year of manufacture.
  • E.g., MA 110-000001 = 2010 year of manufacture.

Approved batteries

North America

Approved batteries for Honeywell BW™ MaxXT II product: Lithium-ion polymer battery as per standards EN50020, UL913, C22.2 No. 157

Rechargeable battery (MX-BAT01)

  • Lithium polymer -20°C ≤ Ta ≤ +50°C
  • Temperature code: T4
  • Battery charger: charging adapter
  • First-time charge: 6 hours
  • Normal charge: 6 hours

Warranty: 2 years including sensors
Approved by CSA to both U.S. and Canadian Standards CAN/CSA C22.2 No. 157 and C22.2 152
ANS/UL – 913 and ANSI/ISA – S12.13 Part 1

  • CSA               Class I, Division 1, Group A, B, C, and D
  • ATEX           CE 0539 II 1 G Ex da ia IIC T4 Ga KEMA 08 ATEX 0001 EN 60079-0, EN 60079-1, EN 60079-11
  • IECEx          Ex da ia IIC T4 Ga CSA 07.0012 IEC 60079-0, IEC 60079-1, IEC 60079-11
  • INMETRO  Ex ia IIC T4 Ga DNV 12.0135
  • KTL              12-KB4BO-0054

For more information on Approvals and Conformity, Declarations refer to the Honeywell web site.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules and ICES-003 Canadian EMI requirements. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help.

Limited Warranty and Limitation Liability

Honeywell Analytics warrants the product to be free from defects in material and workmanship under normal use and service for a period of two years, beginning on the date of shipment to the buyer. This warranty extends only to the sale of new and unused products to the original buyer. Honeywell’s warranty obligation is limited, at Honeywell’s option, to refund of the purchase price, repair or replacement of a defective product that is returned to a Honeywell authorized service center within the warranty period. In no event shall Honeywell’s liability hereunder exceed the purchase price actually paid by the buyer for the Product.
This warranty does not include:

  1. fuses, disposable batteries or the routine replacement of parts due to the normal wear and tear of the product arising from use;
  2. any product which in Honeywell’s opinion, has been misused, altered, neglected or damaged, by accident or abnormal conditions of operation, handling or use;
  3. any damage or defects attributable to repair of the product by any person other than an authorized dealer, or the installation of unapproved parts on the product; or the obligations set forth in this warranty are conditional on:
  4. proper storage, installation, calibration, use, maintenance and compliance with the product manual instructions and any other applicable recommendations of Honeywell;
  5. the buyer promptly notifying Honeywell of any defect and, if required, promptly making the product available for correction. No goods shall be returned to Honeywell until receipt by the buyer of shipping instructions from Honeywell; and
  6. the right of Honeywell to require that the buyer provide proof of purchase such as the original invoice, bill of sale or packing slip to establish that the product is within the warranty period.

THE BUYER AGREES THAT THIS WARRANTY IS THE BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. HONEYWELL SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR BASED ON CONTRACT, TORT OR RELIANCE OR ANY OTHER THEORY. Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this warranty is held invalid or unenforceable by a court of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.


Europe, Middle East, Africa Life Safety Distribution GmbH Life Safety Distribution GmbH Javastrasse 2
8604 Hegnau
Toll-Free 00800 333 222 44 Middle East +971 4 450 5800 Middle East +971 4 450 5852
(Portable Gas Detection)
Technical Services

Honeywell -FS0502098-BW-Max-XT-II-Multi-Gas-Detector-21

Honeywell Analytics Distribution Inc. 405 Barclay Boulevard Lincolnshire, Illinois.
USA 60069
Tel: +1 847 955 8200
Toll free: +1 800 538 0363
Asia Pacific
Honeywell Analytics Asia Pacific 7F SangAm IT Tower,
434 Worldcup Buk-ro, Mapo-gu, Seoul 03922, South Korea
Tel: +82 (0) 2 6909 0300
India Tel: +91 124 4752700

Documents / Resources

Honeywell FS0502098 BW Max XT II Multi-Gas Detector [pdf] User Guide
FS0502098, BW Max XT II Multi-Gas Detector, FS0502098 BW Max XT II Multi-Gas Detector


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