Model 227A/227B Handheld Airborne Particle Counter

?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

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.

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 seconds to 24 hours
Interval time: 1 seconds 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 84캟 (12 to 29캜), 20 to 95% relative humidity, non-condensing
Environment Storage: -40 to 160캟 (-40 to 70캜), up to 98% relative humidity, non-condensing
Accessories Included: Isokinetic Probe (direct mount); Purge Filter; Recharger Stand; AC Adapter; Operator뭩 Manual

When ordering, specify:
Basic Sensitivity: 0.3 micron (227B) or 0.5 micron (227A)
Power (AC): AC adapters for 100 VAC, 115 VAC, or 230 VAC

Optional Accessories
Relative Humidity/Temperature Sensor
High Pressure Diffuser
Particle Vision PortAll Software
Printer, external
Carrying/Shipping Case