The BW Technologies GAXT-A2-DL Alert high-range ammonia (NH3)
single- detector is a handheld, single- detector that uses
an electro cell sensor to measure ammonia (NH3) over a
range of 0 to 400 ppm for more precise measurements in high-NH3
environments than detectors with a lower measuring range, and
that has audio, visual, and vibration alarms, which alert
simultaneously when ammonia reaches any of four preset levels.
The detector has an alphanumeric LCD screen that can be adjusted
by the user to show the type monitored, the two alarm
set-points, the alarm type, the maximum level recorded within
the previous 24-hour period, the time elapsed since reaching that
maximum level, and the battery life remaining. It is operated and
adjusted with a single push button. This detector is used to
indicate potentially harmful levels of ammonia naturally
occurring in the environment; in a variety of occupational
settings such as petroleum refineries, tanneries, sewage
facilities, and paper mills; and in other personal
safety, educational, and ambient monitoring applications.
This detector is set to alert to when levels reach any of
four limits: a low-alarm level, indicating moderate danger; a
high-alarm level, indicating significant danger; a short-term
exposure limit (STEL), the maximum concentration to which
workers can be exposed continuously for a short period of time
without serious risk; and a time-weighted average (TWA) limit,
the maximum average exposure that personnel can experience over
an eight-hour work shift without serious risk. Alarm set-points
are user-adjustable. In low-alarm conditions and when the TWA is
exceeded, the audible alarm beeps, the visual alarm flashes, and
the unit vibrates slowly. In high-alarm conditions and when the
STEL is exceeded, the audible alarm beeps, the visual alarm
flashes, and the unit vibrates quickly. The three bright,
wide-angle visual alarm bars and the built-in vibration alarm
help alert the user to potentially dangerous levels of NH3 in
high-noise conditions. Once the exposure alarm initiates, the
detector records the maximum exposure and the time since
reaching that maximum exposure for up to 24 hours. The
detector logs and retains data of the 10 most recent exposure
events, which it can transmit via an infrared Datalink USB
adapter to a personal computer (both sold separately).
To ensure performance, the detector tests its sensor integrity,
circuitry, and audible and visual alarms upon activation. It
tests its battery upon activation and continuously every 0.5
second. The detector also features an automatic shutdown mode for
additional safety, which activates when the detector fails its
self-test. This detector comes with a back-ed alligator clip
to allow the unit to be worn on a belt, waistband, or lapel, and
a concussion-resistant boot to help protect it against damage. It
is water resistant, and is compatible with the BW Technologies
MicroDock II automatic test system (sold separately). It has a
European Conformity (CE) and ATEX certification in accordance
with Directive 89/336/EEC for safety of electrical and electronic
devices, and it is classified by Underwriters Laboratory (UL) to
U.S. and Canadian standards as an Intrinsically Safe Apparatus
and Associated Apparatus for Use in Class I,II, and III, Division
I, Group A, B, C , and D. It has an ingress protection (IP)
rating of 66/67.
Specifications
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Type
Ammonia (NH3)
Measuring Range
0 to 400 ppm
Resolution
98 inches/248.9 cm H2: 0.1 ppm
CO: 1.0 ppm
O2: 0.1%
Combustible: 1% LEL, 0.1% v/v
Temperature Range
-4 to +104 degree F/-20 to +40 degree C
Humidity Range
15% to 90% RH (non-condensing)
Audible Alarm Sound Level
95 dB
Dimensions
3.75 x 2.0 x 1.1 inches/9.5 x 5.0 x 2.8 cm (H x W x D)*
Weight
2.9 oz./82 g
Battery
3V replaceable lithium battery with 1.5 year life (typical)
*H is height, the vertical distance from the lowest to highest
point; W is width, the horizontal distance from left to right; D
is depth, the horizontal distance from front to back.
A detector is a safety device that detects and monitors
various toxic, combustible, and flammable ses in an area, and
which can also register a decrease in ambient oxygen.
detectors can be portable or stationary, and are typically
classified by their detection methods, which include catalytic,
electro-, point infrared, open-path infrared,
semiconductor, thermal path conductor, and paper tape detection.
detectors are first calibrated to known ses that serve as
a reference points. Their sensors can then be used to measure
ambient concentrations in comparison to the calibration
ses. When concentrations exceed a pre-set limit, an alarm
or signal is triggered, alerting the user to potential danger.
Pre-set limits often include a low-alarm level, indicating a
concentration that poses a moderate danger; a high-alarm level,
indicating a concentration that poses a large danger; a
short-term exposure limit (STEL), the maximum concentration
to which workers can be exposed continuously for a short period
of time without serious risk of harm, and time-weighted average
(TWA) limit, the maximum average exposure personnel can
experience over the course of an eight-hour work shift without
serious risk of harm. Most detectors also feature LCD screens
that provide a variety of information including ses detected
and their concentrations, pre-set exposure limits, and battery
level.
detectors have a variety of industrial and governmental
applications, such as in fire and rescue, mining, construction,
petroleum refineries, tanneries, sewage facilities, and
paper mills. Portable detectors are typically used to monitor
the air around personnel, are worn on clothing or on belts or
harnesses, and are powered with rechargeable or disposable
batteries. They generally require periodic calibration, testing,
and battery recharging or replacement, although some fixed-life
detectors are designed to perform for a number of years without
calibration or battery replacement before being dided.
Stationary detectors are typically powered electrically and
ed near the process area of a or control room. They
also require periodic service, testing, and calibration.
BW Technologies by Honeywell manufactures and distributes
portable and fixed monitoring equipment for use in a wide
range of industries. The company, founded in 1987, is based in
Canada in Calgary, Alberta.
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- Single- detector for surveying levels of ammonia (NH3) in natural and industrial environments, and in other personal safety, training, research, and ambient air monitoring applications.
- Electro cell sensor measures ammonia over a range of 0 to 400 ppm for more precise measurements in high-ammonia environments than detectors with a lower measuring range.
- Audio, visual, and vibration alarms alert simultaneously when ammonia reaches preset TWA, STEL, low, or high levels.
- LCD screen shows self-test status, alarm set-points, maximum exposure, type, alarm level (TWA, STEL, low, or high), and battery life remaining.
- Back-ed alligator clip allows wearing the unit on a belt, and a concussion-resistant boot helps protect against damage.