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Pacific Scientific Instruments Particle Counters
Pacific Scientific Instruments - Met One


Model 237A/237B Airborne Particle Counter

• AC or battery operation• Print count results
• Choose 0.3 micron (237B) or 0.5 micron (237A)
• 0.1 cfm (2.83 lpm) flow rate
• 2 to 6 size channels
• 4 counting modes
• Spreadsheet-compatible data files with Particle Vision™ PortAll™ software
Click here for ordering information!
Data Sheet
(100K PDF)

In the past, if you wanted six size channels or printer capabilities, you had to contend with a large, heavy counter or with external printers, cables, and cords. Now Met One gives you battery-operated portability, up to six size channels, and a built-in printer—all in one compact instrument!

The Model 237 counts airborne particles in up to six different size ranges simultaneously. Count data is displayed on the front-panel as total number of particles (cumulative count) or the particles in each size range (differential count). The printout shows cumulative and differential count data for each size range.

For maximum flexibility, four modes have been incorporated to provide quick answers to measurement questions or to allow unattended operation. The manual mode completes one count cycle then turns the air pump off to prolong battery life. Auto mode repeats the count cycle for the number of cycles programmed to allow unattended monitoring. Concentration mode gives a quick estimate (within seconds) of the particle concentration. Beep mode provides one beep after the count exceeds a selected limit, which is handy for isolating sources of particle contamination such as leaks in filter banks.

Now it is easy to carry a particle counter right to the point of interest and obtain quick, accurate results–results you can immediately print or download later using Particle Vision™ PortAll™ Software. The bright LED display lets you see the data easily. The Model 237: bright display, printer and cordless operation–a real asset in any cleanroom.

Specifications
Size Channels (µm): 
237A 2 ch 0.5, 5.0; 4 ch 0.5, 0.7, 1.0, 5.0; 5 ch 0.5, 0.7, 1.0, 2.0, 5.0; 6 ch 0.5, 0.7, 1.0, 2.0, 3.0, 5.0
237B 2 ch 0.3, 0.5; 4 ch 0.3, 0.5, 1.0, 5.0; 5 ch 0.3, 0.5, 0.7, 1.0, 5.0; 6 ch 0.3, 0.5, 0.7, 1.0, 2.0, 5.0
Flow Rate: 0.1 cfm (2.83 lpm)
Light Source: Laser diode (30,000 hours mean time between failure)
Factory Calibration: Mono-dispersed polystyrene spheres (NIST traceable)
Display: 7-digit red LED
Output: RS232C/RS485 for computer, built-in printer
Location Labels: 250, appear on printout
Data Storage: 500 samples, rotating buffer
Sample and Hold Times: 1 second to 24 hours
Count Alarms: 1 to 9,999,999, counts each channel
Count Modes: Manual, auto, concentration, beep
Concentration Mode: 1 second samples, 1 to 10 samples averaged, display updated every second; displays counts/ft3, liter or counts/1000L (m3)
Power: AC adapter or internal battery pack
Battery Type: Rechargeable NiCd
Battery Recharge Time: 90% in 10 hours; 100% in 12 hours
Operating Time: 4 hours with printing, 8 hours without printing, typical
Size: 6.7" wide x 4.5" high x 11.7" deep (17 x 12 x 30 cm)
Weight: 6.8 lbs (3.1 kg)
Environment Operating: 12 to 29°C (55 to 84°F), 20 to 95% relative humidity, non-condensing
Storage: -40 to 70°C (-40 to 160°F), up to 98% relative humidity, non-condensing
Accessories Included: Isokinetic Probe (direct mount); Isokinetic Probe (handheld) with Tubing; Purge Filter; Printer Paper; AC Adapter; Operator’s Manual

When ordering, specify:
Basic Sensitivity 0.3 micron (237B) or 0.5 micron (237A)
Power (AC) AC adapters for 100 VAC, 115 VAC or 230 VAC
Number of Size Channels 2 to 6
Printer Built-in (standard) or External (optional)

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

Ordering Information ( Pricing for end users in the United States )

 

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