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Model
227A/227B
Handheld Airborne Particle Counter
DISCONTINUED see Model HHPC
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AC or battery operation
• 0.3 micron at 0.1 cfm (227B)
• 0.5 micron at 0.1 cfm (227A)
• Counts 2 sizes simultaneously
• Stores data from 200 locations
• Labels data with location
• Internal rechargeable battery
• Weighs only 2.1 lbs (0.97 kg)
• Spreadsheet-compatible data files with Particle Vision PortAll™
software |
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The Model 227
Portable Airborne Particle Counter offers the features and
sensitivity of larger instruments and easy handheld operation.
Weighing only two pounds, the Model 227 features a sensitivity
of 0.3 micron (227B) or a sensitivity of 0.5 micron (227A),
is fully self-contained, and uses reliable laser diode technology.
It connects to a remote printer or computer, and can be part
of a facility-monitoring system.
The Model 227
counts two sizes of particles simultaneously. Sample times
can be set for up to 24 hours. Count data are stored in memory
for easy transfer to a printer or computer. To make the most
of its portability, the Model 227 features several counting
modes for quick analysis of cleanroom conditions. The concentration
mode gives a continuously updated approximation of the number
of particles per cubic foot or per liter. The approximation
is based on a user-selectable sample period of one to ten
seconds. In the auto mode, it automatically takes a specified
number of samples and stops, allowing unattended operation.
The average mode calculates the average, minimum, and maximum
count after a specified number of samples.
In beep mode,
the Model 227 sounds a beep each time it counts a specified
number of particles. This is useful for locating leaks in
filters.
To protect
your cleanroom, the Model 227 contains an exhaust filter.
The pump and sensor are turned off when the battery charge
drops below a safe operating level, maintaining power to preserve
data stored in memory. The Met One Model 227: a handful of
information.
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| Specifications |
| Size channels: |
Model 227B Ch 1: 0.3
microns; Ch 2: selectable - 0.5, 1, 3, or 5
Model 227A Ch 1: 0.5 microns; Ch 2: selectable - 0.7, 1, 3,
or 5 |
| Flow rate: |
0.1 cfm (2.83 lpm) |
| Locations labels: |
100, appear on printout |
| Data storage: |
200 samples, rotating
buffer |
| Sample time: |
1 second to 24 hours |
| Interval time: |
1 second to 24 hours |
| Display: |
4-line LCD; 7 digits
for counts |
| Concentration Mode: |
1 second samples,
1 to 10 samples averaged, display updated every second; displays
counts per cubic foot or liter |
| Battery operation: |
8 hours continuous,
rechargeable NiMH, recharge time 90% in 10 hours, 100% in 12
hours |
| Power: |
AC adapter or internal
battery pack |
| Weight: |
2.1 pounds (0.97 kg) |
| Size: |
4"W x 6.9"H
x 2.3"D (10.3 x 17.5 x 5.9 cm) |
| Output: |
RS-232C/RS-485 for
computer or printer |
| Environment Operating: |
55 to 84°F (12 to
29°C), 20 to 95% relative humidity, non-condensing |
| Environment Storage: |
-40 to 160°F (-40
to 70°C), up to 98% relative humidity, non-condensing |
| Accessories Included: |
Isokinetic Probe (direct
mount); Purge Filter; Recharger Stand; AC Adapter; Operator’s
Manual |
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Met One Product Menu |
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