BW Honeywell GasAlert Quattro 4-Gas Monitor QT-XWHM-R-Y-NA

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Regular Price $755.00 Sale Price $629.00 You Save $126.00

The BW Honeywell GasAlert Quattro 4 gas monitor features a large, clear screen so you can continuously monitor the levels of the gases and check to make sure the device is functioning (a small heartbeat indicates everything is okay). The Quattro's IntelliFlash system gives you continuous information as to the operational state of the device, so you can be sure that it is active and keeping you and your team safe. The Quattro gas monitor has four full-sized sensors to detect oxygen (and any serious atmospheric changes therein), hydrogen sulfide (H2S), carbon monoxide (CO) and the LEL of a variety of dangerous flammable/combustible gases (LEL). Should anything troublesome occur while you are on the job, the BW Quattro's 95dB alarm, vibration alert and an array of warning lights will let you know.

The BW Quattro is ideal for confined space entry and comes calibrated with a fully charged battery and ready to use out of the box. The Quattro we stock comes with changeable rechargeable batteries, offering hours of run time. Should it be needed, you can easily swap the batteries for alkalines in the field, though this does require purchasing the alkaline battery pack. A hex Allen screw keeps the battery in place until a change is needed. If you're looking for a confined space entry gas monitor with an internal pump, consider the GasAlert Max XT II also from BW Honeywell. While the Quattro is slightly smaller and lighter (and also without pump) when compared to the GasAlert Max XT II, it is equally durable. What it lacks in pump, you can make up for with the Confined Space Accessory Kit, should you need this functionality. As is standard across their range of toxic-gas detectors, BW Honeywell has implemented a one-button control system, designed for easy use even with gloved hands. The Quattro's simple, fool-proof interface means that you won't have to spend extended periods of time training your staff; properly charged and programmed, you can have full confidence that should anything untoward occur, they will know about it long before it becomes serious.

The Quattro is compatible with the MicroDock II for charging and data logging, as well as Fleet Manager II software, enabling you to customize the alarm boundaries (via the IR Data Link Kit, as found in the Deluxe Confined Space Accessory Kit) to match your company's safety standards. You can change the tolerance of various exposure times: Short Term Exposure Limits (STEL; 5-15 minutes), Long Term Exposure Limits (LTEL; ~8 hours) as well as high/low values for each gas to better suit your particular site needs. Each unit comes individually packaged in a cardboard box that includes the 120V AC battery charger, operator's manual, cd-rom owner's manual, calibration/bump test adapter and 18 inches of clear pvc tubing, double-ended screwdriver (No. 1 Phillips-5/64 hex Allen) and factory calibration certificate.

Take advantage of the PK Safety 4 Year Service and Protection Plan for BW Gas Monitors, and our Calibration Services at a great discount.

Note: Calibration gas may be ordered separately. Due to HazMat regulations, calibration gas takes between 5-7 days to ship via UPS Ground and will not arrive at the same time as the monitor. Click on the link to view more calibration gas details. BW 4-Gas Calibration Cylinder.

Optional Accessories: Vehicle Power Adapter


  • Size: 5.1 x 3.2 x 1.9 in. / 13.0 x 8.1 x 4.7 cm

  • Weight: 11.15 oz. / 316 g (with rechargeable battery pack) - 11.92 oz. / 338 g (with alkaline battery pack)

  • Temperature: -4 to +122F / -20 to +50C

  • Humidity: 10 - 100 percent RH (non-condensing)

  • Alarms: Visual (six red LED lights), vibrating, audible (95dB) - low, high, STEL, TWA, OL (over limit)

  • Tests: Sensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous), sensor (continuous)

  • Pump: Compatible with the sampler motorized sampling pump

  • Battery life: AA alkaline: 14 hrs (+68 to 122F / +20 to 50C) Rechargeable: 20 hrs (+68 to 122F / +20 to 50C) 18 hrs (-4 to +32F / -20 to 0C)

Sensor Specifications:

  • Hydrogen sulfide (H2S): 0-200 ppm, 0.1 ppm (resolution)

  • Carbon monoxide (CO): 0-1000 ppm, 1 ppm (resolution)

  • Oxygen (O2) : 0-30.0 percent, 0.1 percent (resolution)

  • Combustible gases ( percent LEL): 0-100 percent LEL 0-5.0 percent v/v, 1 percent 0.1 percent (resolution)

FAQs: How Often Do I Need To Calibrate My Gas Monitor?

Product Manual:

Gas Alert Quattro Manual Custom calibrations are available direct from PK Safety.

If you need custom alarms for your BW Quattro, we have technicians that can customize these settings to your exact requirements without delaying your order. Volume discounts starting at 6 units. Call us at 1-800-829-9580 for details.

Part Numbers:


Alternative Model: QT-XWHM-A-Y-NA - Alkaline version (NOT a stock item. Please call/email for pricing and availability.)

More Information
Price $755.00
Product Weight (lbs.) .8
Weight 1.3000
Brand BW Honeywell
Type Multi-Gas
Gas Type %LEL, O2, H2S, CO
5th Sensor No
Color No
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  1. Jenny

    2014-01-17 23:58:25

    How much is the alkaline battery pack that is available separately? So the detector can be used both the rechargeable battery and also AA batteries if forgot to charge. Thank you!

    1 answer
    1. Justin McCarter

      2014-01-17 23:58:25

      The Alkaline battery pack (with batteries) is an easy order through our Customer Service. It's currently $50 and the part number is QT-BAT-A01.

      Please give us a call at 1-800-829-9580 for help ordering.

  2. TJ Ribbe

    2014-01-22 18:20:39

    Do these come calibrated? How often do they need calibrated?

    1 answer
    1. Justin McCarter

      2014-01-22 18:20:39

      The Quattro comes with a fully-charged battery and is calibrated and ready to use right out of the box. <br>
      BW Technologies by Honeywell recommends that the sensors be calibrated at least once every 180 days (6 months). Click here for more information about <a href="">calibration frequency</a>.

  3. Nicholas Wheeler

    2014-02-26 17:20:55

    Are extra sensors available separately?

    1 answer
    1. Justin

      2014-02-26 17:20:55

      Yes. Replacement sensors are available here in the <a href="">BW Quattro Sensors and Accessories Section</a> of our site.

  4. saj

    2014-05-23 15:00:24

    How do you use the remote manual aspirator pump? Are there any instructions for use?

    1 answer
    1. Justin

      2014-05-23 15:00:24

      No, there aren't any instructions on use. You may refer to the manual that's provided under the "Descriptions" tab though that doesn't explain how to use the monitor.

  5. Toby

    2014-12-08 18:07:51

    Is the screen on this back lit for low light situations?

    1 answer
    1. Chris

      2014-12-08 18:07:51

      The BW Quattro gas detector from Honeywell has a large LCD screen that lights up when any of the buttons are pushed, and also when any of the alarms are activated.
      It does not have a light sensor, that might automatically illuminate the screen in low light environments. While that might be a nice feature, conserving batteries for long run time is a more pressing concern.

  6. Mike

    2016-02-01 19:20:29

    Whats the average life span of the censors in this unit?

    1 answer
    1. Ben

      2016-02-01 19:20:29

      The sensors are warrantied for 2 years from date of purchase however we find typically they last 5 years, the only exception being the O2 sensor which lasts 2-3 years.

  7. Deakon

    2016-10-27 18:41:03

    How does the Quattro match up to the Micro ClipXL? Also how are they each Calibrated?

    1 answer
    1. Alan

      2016-10-27 18:41:03

      The Quattro works the same as the MicroClip XL in that they're both diffusion monitors that only monitor the air around your breathing area. Where they differ is in construction as the Quattro is built a bit more sturdy than the MicroClip XL.

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