General
Purpose Gas Detector
Model 8057 |
| Description |
 |
The
Model 8057 General Purpose Gas Detector effectively monitors the
workplace air for potentially dangerous gas leaks from tubing,
equipment, containers, reaction vessels, cylinder valves, and
pressurized systems. The Threshold Limit Value (TLV) for most
gases can be detected. |
| Weighing
only 14 ounces (400 gms), this truly portable and personal
detector can be conveniently worn on a belt or over the shoulder
with its carrying strap. |
 |
The unit
continuously samples the air for hazardous gases and vapors. It
sounds an audible alarm and flashes an LED lamp when a
potentially dangerous concentration of gas is detected.
Headphones are provided for use in noisy environments. The
entire unit is protected in a leather outer case and comes with
shoulder strap and belt loop. Each unit is factory calibrated
for maximum sensitivity. Rechargeable NiCad batteries (with
charger) are standard. |
| The Model
8057 uses a solid state/thermal conductivity sensor with a
semiconductor platinum filament. The new sensor design allows
low concentrations of gases to be detected. |
| The Model
8057 sensor design is sensitive to a wide variety of gases and
vapors. This design, in combination with the alarm set wheel,
allows you to minimize interferences from ambient background
vapors. |
| For
more product information, go to our Literature
Center and request Matheson Tech Brief 218. |
| Design
Features |
 |
- Small, portable unit
weighs only 14 oz. (400 gms).
- Detects gas leaks at
ppm and sub-ppm levels.
- Audible alarm and
flashing LED alerts wearer of potentially dangerous gas
levels.
- Easily worn on the
belt or over shoulder.
- Probe allows unit to
be used as point source leak detector for tubing, fittings,
valves, containers, etc.
- Rechargeable NiCad
batteries (supplied with charger) give long operating life
|
| Gases
Detected |
| Semiconductor
Processing Applications |
| Arsine |
Phosphine |
| Silane |
Diborane |
| Hydrogen
and other gases depending upon sensitivity settings |
Detectable Leak Amounts |
| Arsine,
Silane |
0.3 ppm |
| Phosphine |
0.13 ppm |
| Diborane |
0.15 ppm |
| Hydrogen |
10 ppm |
| Germane |
2 ppm |
| General
Purpose Gas Detection - Partial List of Detectable Gases/Vapors |
| Acetone |
10 cc/min. |
Hydrogen Selenide |
0.5 ppm |
| Ammonia |
5 ppm |
Hydrogen Sulfide |
1 ppm |
| Benzene |
10 cc/min |
Isopropyl Alcohol |
10 cc/min. |
| Carbon Monoxide |
1 ppm |
Methane |
1 cc/min |
| Chlorine |
7 ppm |
Methyl Alcohol |
10 cc/min. |
| Dichloroethane |
10 cc/min. |
Methyl Bromide |
40 ppm |
| Ethanol |
10 cc/min. |
Methyl Chloride |
50 ppm |
| Ethylene |
1 cc/min |
Methyl Ethyl Ketone |
10 cc/min. |
| Ethylene Oxide |
350 ppm |
Propane |
1 cc/min. |
| Formaldehyde |
10 cc/min. |
Sulfur Dioxide |
1 ppm |
| Freon 12 |
1 cc/min. |
Toluene |
10 cc/min. |
| Hexane |
10 cc/min. |
Trichloroethylene |
10 cc/min. |
| Hydrogen Bromide |
1 ppm |
Vinyl Chloride |
10 ppm |
| Hydrogen Chloride |
1 ppm |
Xylene |
10 cc/min. |
| Applications |
| The Model 8057 functions
as a personal gas leak detector for production, QC, maintenance,
and engineering personnel in a wide variety of process and
laboratory locations and environments. Personnel no longer need
be within the "sphere of influence'' of a large multipoint
gas detection system. They can now take their personal gas leak
detectors with them, on site where needed. |
| Since personal
protection is only as good as the sampling procedure used,
different areas should be checked for gas leaks that could lead
to potential worker exposure. |
| Leak
Detection |
| The Model 8057 also
functions as point source leak detector for process and
instrumentation gases. With the accessory probe attached, it can
give an early warning indication of small leaks in cylinder or
piping connections, or other gas handling hardware before they
become large, potentially dangerous leaks. A comprehensive
floor-to-ceiling scan procedure should be used for maximum
effectiveness in leak detection. The 8057 functions much as a
Geiger counter does. Close to a gas leak, it beeps with
increased frequency to alert the user. |
| Gas Cabinet
Cylinder Changeover |
| The Model
8057 has applications in leak detection of valves, fittings,
purge assemblies and other hardware during cylinder changes in
gas cabinets. |
| Process
Vessels and Enclosures |
| The Model 8057
can be used to detect leaks from process vessels,
storage tanks, reaction vessels, and associated piping.
It is good practice to periodically check process and
associated equipment and materials for leakage before
serious, potentially dangerous leaks have developed. |
| Remote
Enclosed Areas/Ductwork Leak Detection |
| It is also good
practice to check the workplace air in remote and/or
enclosed unmonitored areas before workers enter it. The
same holds for large ductwork and ventilation systems
that, during shutdown for maintenance and engineering
work, can contain trapped pockets of hazardous gases.
The Model 8057 can be used to sample these and other
areas for leaks of potentially hazardous gases to help
ensure a safe environment both before and during work
tasks. Proper oxygen concentration should also be
determined in remote or enclosed areas before workers
enter. (Click here for Matheson's Models 8060/8061
Oxygen Deficiency Monitors) |
| Cylinder
Storage Areas |
| It is also good
practice to screen incoming gas cylinders (both on
receipt and return shipments) for possible leakage
around cylinder valves. The Model 8057 with probe
simplifies this process because of its small size and
weight. The probe can be inserted into the slots in the
cylinder cap for fast leak detection. |
| Because gas
leaks can stratify, a comprehensive floor-to-ceiling
scan procedure should be used to detect accumulations of
potentially hazardous gas leaks in cylinder storage
areas. |
| Specifications |
| Detection
principle: |
Solid
state/thermal conductivity sensor with low power drain:
automatic and continuous sampling. |
| Detection
time: |
5-10
seconds depending on gas, concentration, and sensitivity
setting |
| Detection
indication: |
Intermittent
buzzer and LED lamp. |
| Power
source: |
Size
"AA'' rechargeable NiCad batteries (4), continuous
operating time approx. 3 hrs. with full charge (charger
included). |
| Recharging
time: |
14
hours from a fully discharged state. |
| Operating
temperature: |
0°
to 40°C (32°F to 104°F) |
| Size: |
2.7"w
x 6.1"h x 1.2"d
68mm x 155 mm x 32mm |
| Weight: |
397g.
(14 oz.) |
| Warranty |
1
Year |
| Ordering
Information |
| Model |
Description |
| 8057 |
General
Purpose Gas Detector, complete with detector unit,
110VAC battery charger, four NiCad batteries, earphone,
filter housing with filter element, check gas vial,
sampling probe and leather case. |
| 8057-220 |
Same
as 8057 with 220VAC charger in lieu of 110VAC |
| 8057-01 |
Pump
Assembly (replacement) |
| 8057-02 |
Sensor
Assembly (replacement) |
| 8057-03 |
Frame
Assembly (replacement) |
| 8057-04 |
Filter
(pkg 10) (replacement) |
| 8057-05 |
Printed
Circuit Board (replacement) |
| 8057-06 |
Check
Gas Vial (replacement) |
| 8057-08 |
Replacement
110VAC charger |
| 8057-09 |
Replacement
220VAC charger |
| 8057-10 |
Viton
Probe Tip (replacement) |
| 8057-11 |
Battery
Door (replacement) |
| For
more product information, request Matheson Tech Brief
218. |
|
| |
|
|
