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BW Technologies GasAlert Extreme Single gas monitor

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BW Technologies GasAlert Extreme Single gas monitor

BW Technologies GasAlert Extreme Single gas monitor

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Gas Alert Extreme Single Gas Monitor by BW Technologies
What it does
  • Single Gas monitor which detects one of the following gases: CO, H2S, O2, SO2, PH3, CL2, NH3, NO2, HCN, ETO, CLO2, O3, NO

  • Multiple language and datalogging option
  • Rugged, IP-66/67 highly water-resistant design
  • Built-in concussion-proof boot
  • Continuous LCD shows real-time gas concentration with backlight in low light (auto and on demand); in alarm (auto)
  • LOW, HIGH, TWA and STEL alarms with adjustable set points
  • Provides 95 dB tone and bright LED indication on alarm (typical)
  • Internal vibrating alarm
  • Compact (1.1 x 2.0 x 3.75 in. / 28 x 50 x 95 mm) and Lightweight (2.9 oz. / 82 g)
  • 2-year battery life (typical) with replaceable 3V camera battery
  • Simple auto-zero and calibration procedure
  • Full function self-test of: sensor, battery, and circuitry integrity

*The Gas Alert Extreme is so Water Resistant that the U.S. Coast Guard signed a contract to use them exclusively in their operations

Are you looking for an extremely easy to use, reliable, and waterproof single gas instrument? Then the Gas Alert Extreme is the instrument you need.

How easy is the Gas Alert Extreme to use?

All you need to do is turn the instrument on and that's it. No complicated settings and nothing else to do. If you would like to view the peak readings or OSHA STEL and TWA readings, simply press a button. In fact the Gas Alert Extreme is so easy to use that you don't even need to turn it off if you don't want to. The 3V Lithium Ion camera battery will last two years running continuously, is easily changed, and available at any location that sells batteries.

Alligator Clip

The alligator clip is extremely strong and will securely attach to your belt or shirt pocket without worrying that it will fall off.
There is also a D-ring which can be used for tying on a rope for hanging or lowering into a confined space. This D-ring can also be used to attach a lanyard to the gas alert extreme for wearing around the neck.

Highly Water Resistant

One of the most impressive featues of the Gas Alert Extreme is the ability to be completely submerged without damage. If you or your workers have ever dropped a unit in water, or forgot it outside in the rain you will instantly recognize how valuable this is, because other units that are less water resistant would be destroyed.


The Gas Alert Extreme is also extremely durable and will withstand most falls. The case is rubberized and shock absorbing and it will continue to operate even if dropped 15-20 feet or more.
Not an expert in gas detection and gas monitors? Not a problem with the Gas Alert Extreme. Just turn it on. That's all there is to it. If the unit exceeds OSHA predetermined alarm limits it will go notify you with 3 different alarms. Three extremely bright red leds surround the top of the instrument. A loud 95 decibel audible alarm is ear splitting, and a vibrating alarm is also included. Bottom line, if the Gas Alert Extreme goes into alarm it is almost impossible not to notice. This is extremely important for safety applications since other lesser quality instruments often have dim LED's or low sounding audible alarms. The Gas Alert Extreme gives you all of the protection you need to be safe from dangerous gasses.
If you find that you want to change settings on the instrument this is extremely easy as well. Simply press two button to enter the user menu and all of the instruments settings can be modified. For example if you wanted to change an alarm point or anything else everything is fully customizable.


One of the most common questions we receive is about calibration. Calibrating the Gas Alert Extreme couldn't be easier. Simply hold down two buttons simultaneously for 5 seconds and the instrument will go into calibration mode. Just attach your calibration gas when it tells you and when it's finished it will beep to let you know it's done. That's all there is to it.
Don't want to calibrate? Not a problem. The Gas Alert Extreme's calibration is good for 180 days. Simply send it in to be factory calibrated twice a year and there's no need to worry about calibration.
All of this in a size that is less than three ounces and about the size of a pager!
We're confident that the Gas Alert Extreme will be the best single gas monitor that you've ever used! If you don't agree just return it within 30 days for a full money back guarantee.
GasAlert Extreme Specifications:
Size 1.1 x 2.0 x 3.75 in. / 2.8 x 5.0 x 9.5 cm
Weight 2.9 oz. / 82 g
Alarms - Visual, vibrating, audible (95dB)
- Low, High, STEL, TWA
Tests Sensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous)
Pump Compatible with the Sampler motorized pump
Typical battery life 2 year battery life (typical) with replaceable 3V battery
User options Confidence beep, Latching alarms, Stealth mode, Passcode protection, Automatic O2 Calibration, Datalogger Sampling Rate, Automatic backlight, User-settable calibration gas level, Calibration past due lockout, Language choices (5), Adjust clock
Warranty Full 2 year warranty including sensors (1 year NH3 sensor)

Sensor Specifications:
Gas Measuring Range (ppm) Operating Temperature Relative Humidity (non-condensing)
H2S 0-100 -40 to +122°F/-40 to +50°C 15% - 90%
H2S (High Range) 0-500 -40 to +122°F/-40 to +50°C 15% - 90%
SO2 0-100.0 -40 to +122°F/-40 to +50°C 15% - 90%
HCN 0-30.0 -40 to +122°F/-40 to +50°C 15% - 90%
CO 0-1000 -22 to +122°F/-30 to +50°C 15% - 90%
CO (Low H2) 0-1000 -22 to +122°F/-30 to +50°C 15% - 90%
NH3 0-100 -4 to +104°F/-20 to +40°C 15% - 90%
NH3 (High Range) 0-400 -4 to +104°F/-20 to +40°C 15% - 90%
Cl2 0-50.0 -4 to +122°F/-20 to +50°C 10% - 95%
NO 0-250 -4 to +122°F/-20 to +50°C 15% - 90%
NO2 0-100 -4 to +122°F/-20 to +50°C 15% - 90%
PH3 0-5.0 -4 to +122°F/-20 to +50°C 15% - 90%
ETO 0-100.0 -4 to +122°F/-20 to +50°C 15% - 90%
ClO2 0-1.0 -4 to +122°F/-20 to +50°C 15% - 95%
O3 0-1.0 -4 to +122°F/-20 to +50°C 15% - 90%
O2 (%by Vol.) 0-30.0% -4 to +122°F/-20 to +50°C 0% - 99%

Questions & Answers

3 Questions & 3 Answers
ricky mines
from marietta ,Ga.30060 asked:
February 24, 2017
what gases does it alert too
1 Answer
This is a "choose your configuration" page. The dropdown menu lets you choose which gas it is designed to detect.
Submitted by: Customer Service on February 24, 2017

from Guangzhou,China asked:
September 4, 2013
When I power on GasAlert they are immediately start alarm.What I can do?
1 Answer
There could be a couple of things to consider. Are your sensors more than 2 years old? If they are, they're likely expired and new ones are needed. If they are less than 2 years old, I'd ask if the monitor has been calibrated according to your facility, or job site's, safety director? If this criteria has been followed for proper maintenance, then there could be an issue with the main circuit board. It could require service in this case. We are a BW service center and can assist with a service request if you have that need.
Submitted by: Customer Service on September 5, 2013

from Tucson, Arizona asked:
May 22, 2013
Can we get the unit (GasExtreme HCN) calibrated when we order? we need NIST or other national/international standard traceability (with data) if available
1 Answer
Dear Gil, Thank you for your question. The Gas Alert Extreme comes pre-calibrated and the calibration is traceable to NIST standards.
Submitted by: Customer Service on May 22, 2013