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Model 237H Portable Airborne Particle Counter

AC or battery operation
0.1
minimum threshold setting at 0.1 cfm
Two to six size channels
Four counting modes
Process gas model

Introducing the worldsmallest particle counter with true 0.1 micron sensitivity! In the past, if you wanted six size channels and 0.1 micron sensitivity, you had to contend with a large, heavy counter. Now, with a breakthrough in design, Met One gives you battery-operated portability, up to six size channels, and 0.1 micron sensitivityll in one compact instrument!

The Model 237H displays count data on the front panel as total number of particles (cumulative count) or the particles in each size range (differential count). Four counting modes provide quick answers to measurement questions. 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.

Specifications

Minimum Threshold Setting 0.1 at 50% counting efficiency

Flow Rate 0.1 cfm (2.83 L/min)

Size Channels Configured at factory for one of the following combinations:
2 channel 0.1, 0.5
4 channel 0.1, 0.3, 0.5, 1.0
5 channel 0.1, 0.2, 0.3, 0.5, 1.0
6 channel 0.1, 0.2, 0.3, 0.5, 0.7, 1.0

Light Source HeNe laser

Coincidence Loss Less than 5% at 120,000 particles/ft3

Factory Calibration Mono-dispersed polystyrene spheres (NIST traceable)

False Count Not more than one count in 5 minutes

Display 7-digit LED

Output RS232C/RS485 for computer

Location Labels 250, appear on printout

Data Storage 500 samples, rotating buffer

Sample and Hold Time 1 second to 24 hours

Count Alarms 1 to 9,999,999 counts each channel

Power 5 watts, +10 V (approx.) (+6 V with battery pack)

Battery Type Rechargeable Ni-Cd

Operating Time 2 hours

Size 6.7" w x 4.5" h x 11.7" d (17 x 12 x 30 cm)

Weight 9.9 lbs (4.5 kg)

Environment Operating 55 to 84(12 to 29), 10 to 85% relative humidity, non-condensing

Storage -40 to 160(-40 to 71), up to 98% relative humidity, non-condensing

Accessories Included Isokinetic Probe; OperatorManual

Ordering Guide

When ordering, specify:

Power (AC) 100-120 VAC or 220-240 VAC

Number of Size Channels 2 to 6

Optional Accessories

Relative Humidity/Temperature Sensor

Isokinetic Probe

High Pressure Diffuser

External Printer

Particle Vision?PortAll?Software

Carrying/Shipping Case