BW GasAlert Extreme Gas Detector
  • O2
  • CO
  • CL2
  • CLO2
  • H2S
  • NH3
  • PH3
  • SO2
  • O3
  • NO
  • HCN
  • NO2
  • C2H4O
BW GasAlert Extreme Gas Detector

Product Code -

Price From: £170.00 exc VAT £170.00 inc VAT £204.00

Price as configured: exc VAT £0.00 inc VAT £0.00

The BW GasAlert Extreme Gas Detector is a serviceable monitor and is available to cover a range of toxic gases and oxygen depletion applications. Choose from the selection of gases below.

Price as configured: exc VAT £0.00 inc VAT £0.00

Availability: In stock

Description / Features / Spec


BW GasAlert Extreme Gas Detector

BW Technologies offer the GasAlert Extreme as a single gas detector for the detection of various gases including O2, H2S, CO, NH3, HCN, O3.  See the drop down for the full list of gases available.  This particular version of the GasAlert Extreme comes with a yellow casing.

You can have confidence that the GasAlert Extreme is a reliable instrument due its robust, water-tight casing.  It also features an in-built concussion-proof boot.  BW has designed the detector to be comfortable, making it both compact and light in weight.

This single gas detector is suitable for various industries and applications and can be used securely using a password-protection feature for the settings on the GasAlert Extreme.

Key Features

  • Using the on/off function will save both battery life and sensor life
  • Ability to change sensors and battery in the field
  • Compatible Accessory - BW MicroDock II automatic bump test and calibration station
  • English, Portuguese, Spanish, French and German - available languages
  • Displays real-time gas concentrations on the LCD screen
  • Capable of logging data
  • GasAlert Extreme compatible with the Sampler motorised pump
  • Ability to carry out full-function tests for battery, sensor and alarms



1.1 x 2.0 x 3.75 in / 2.8 x   5.0 x 9.5 cm


2.9 oz / 82 g


Visual, vibrating, audible (95   dB)
  Low, High, STEL, TWA

Typical Battery

1.5 year battery life   (typical) with replaceable 3V battery

Operating Temp.

-4 to 104°F / -20 to +40°C

Relative Humidity

15 – 90%


EMI/RFI: Complies with EMC   Directive 89/336/EEC

IP Rating

IP 66/67


Class I, Div. 1, Gr. A, B,   C, D
  Class II, Div. 1, Gr. E, F, G
  American Bureau of Shipping
  ATEX: CE Ex II 1 G T4
  Ex ia IIC T4
  IECEx: Ex ia IIC T4
  CE: European Conformity


Full two year warranty  / Sensor warranties vary, see datasheet


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Take advantage of our web-exclusive free UK mainland* delivery offer on orders over £75 ex VAT.  See all costs for delivery below and visit our main delivery page for more information on timescales as some restrictions may apply.

Please note: we're currently facing high demand for all Facemasks and Filters, due to the Coronavirus outbreak.  Our stock levels are changing constantly and we're working hard to fulfill demand where we can. This means that express delivery may not always be available and standard lead times may vary, however our Sales Team will be in touch to advise latest delivery timescales. 

UK & Ireland Delivery Options

UK Mainland Standard Delivery on orders under £75 ex VAT - £5.95 ex VAT*
UK Mainland Express Delivery - £21.50 ex VAT (timescales vary – please see delivery page)
Highlands Delivery - £25.00 ex VAT
Channel Island Delivery - £40 ex VAT
Northern Ireland & Republic of Ireland - £25 ex VAT
Saturday Delivery Options – Please contact us on 0141 771 7749 for more info

Standard delivery timescales are normally 3-5 working days, depending on stock availability.  Express delivery is normally 1-3 working days, depending on stock availability.  Although we carry an extensive stock, there may be some items that are unavailable due to quantities or otherwise.  In this case we will inform you of the status of your order and whether or not it can be fulfilled within our standard delivery timeframe. *Mainland UK delivery excludes Northern Ireland, other charges apply.

Please visit our main delivery page for more terms and conditions or contact our Sales Team on 0141 771 7749  or [email protected] for more information.

International Delivery Options

Delivery costs vary between countries.  Please visit our main delivery page for more information.



Should you wish to cancel an order or return unwanted goods please follow the procedures detailed below to help us ensure cancellations/returns are processed as quickly and efficiently as possible.

Simply log on to your customer account, note the order reference number and email the full cancellation details to [email protected] or contact us on 0844 550 0001. Assuming the order has not been despatched we will cancel.

You have the right to cancel the purchase of goods without having to give a reason at any time within the “cooling off period” of fourteen working days, beginning the day after you take delivery of your order.

You must notify us of your cancellation in writing via email to [email protected] or to our contact address. (Details Here)

If you are in possession of the goods you are under the duty to retain them and take reasonable care of them.

You must send the goods back to us in their original condition to our contact address at your own cost (unless we delivered the item to you in error or the item is damaged or defective) as soon as possible once you have cancelled the contract.

Alternatively we will collect the goods from you which will incur a charge no greater than the actual cost of arranging the collection and shipping. In this case you must make the goods available for collection. We will contact you to make further arrangements.

We reserve the right to make a charge not exceeding our direct costs of recovering the goods if you do not return the goods or return them at our expense.

Upon receipt of returned items in satisfactory condition we will arrange a full credit by the same method used to pay for the goods originally. Any credit due will be processed within a maximum of thirty days.

Note: If you wish to return goods for refund or exchange after 14 days, a re-stocking fee of 20% of the full order total will apply.

If upon receipt of goods you find them to be faulty, damaged or if you have been incorrectly supplied an item, you should notify us within 24 hours by contacting 0844 500 0001 or [email protected] and quoting your order number and contact details.

Frontline Safety will arrange uplift of any damaged or wrongly received goods and if on inspection of goods we also find them to be damaged, faulty or incorrectly supplied, we will offer replacement goods or provide a full refund.

We recommend you inspect all goods prior to signing for and accepting delivery. If there is any visible damage to the outer packaging, ensure goods are sign for as damaged. In instances where it isn’t possible to sign for goods as damaged, these should be signed for as unexamined.

Note: If your goods happen to develop a fault out with the standard returns period but within supplied warranty period or if you require any additional assistance, please contact us on 0844 550 0001 or email [email protected]


All postage, handling, customs and duty charges for all returned goods are the responsibility of the customer. We recommend using a fully traceable, insured service as goods are your responsibility while in transit.

Related Blog Post

How do I manually calibrate the BW GasAlert Extreme for Toxic Gases?

In order to calibrate your unit, you’ll need the appropriate concentration of calibration gas, a length of tubing, a suitable regulator and the calibration cap which should be supplied with the gas monitor.


Want to know why you should buy the BW GasAlert Extreme single gas detector?  Check out our YouTube video.

Product Video

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