Particle counters

Kojair Tech Oy represents US made high sensitivity Met One Particle Counters in Finland. Particle Counters are usually used for example in medical industry, air craft technology, semiconductor industry, hospitals, electronic industry and anywhere else, where the particle concentration and air cleanliness are important.

All Met One models are reliable and easy to use. Kojair's Met one collection includes many models of particle counters.

For example:

MODEL 227A/227B

Battery operated
0,3 or 0,5 micron sensitivity at 0,1 cfm
Counts 2 sizes simultaneously
5 counting modes
RS-232 to computer or printer

Specifications and Ordering

Size channels: 2, Size 1 fixed, Size 2 user selectable from list of four
Model 227B: Size 1: 0.3 microns
Size 2: selectable - 0.5, 1, 3, or 5
Model 227A: Size 1: 0.5 microns
Size 2: selectable - 0.7, 1, 3, or 5
Flow rate: 0,1 cfm
Locations labels: 0 to 250, numeric
Data storage: 200 records
Sample time: 1 second to 24 hours
Interval time: 1 second to 24 hours
Count cycles: 0 - 99
Display: 4-line LCD; 7 digits for counts
Count data: Total counts, counts/ft3, counts/liter
Coincidence: <5% at 2,000,000 particles/ft3
Printer: External (RS-232)
Battery operation: 8 hours continuous, NiMH
Power: 100, 115 or 230VAC, 50/60 Hz (AC/DC adapter)
Weight: 2.13 pounds (0.97 Kg)
Size: 42W x 6.9"H x 2.3"D (10.3W x 17.5H x 5.9D cm)
Output: RS-232C/RS-485 for computer
Included with unit: Isokinetic probe, purge filter, recharge stand, manual, AC/DC adapter

When ordering, please specify:
Min. threshold size: 0.3 or 0.5 microns
AC voltage: 100, 115 or 230 VAC

MODEL 2400/2408

0.3 or 0.5 micron sensitivity at 1 cfm
Counts 2 to 6 sizes simultaneously
Supports manifold, up to 32 ports
4 counting modes
209E calculations
Built-in printer

Specifications and ordering

Size channels: 2 to 6, configured at the factory
Model 2400:
2: 0.3, 0.5
4: 0.3, 0.5, 1, 5
5: 0.3, 0.5, 1, 5, 10
6: 0.3, 0.5, 1, 3, 5, 10
Model 2408: 2:
2: 0.5, 5
4: 0.5, 1, 5, 10
5: 0.5, 1, 2, 5, 10
6: 0.5, 1, 2, 3, 5, 10
Flow rate: 1 cfm
locations labels: 0 to 999, numeric
Data storage: 400 records
Sample time: 1 second to 24 hours
Interval time: 1 second to 24 hours
Count cycles: 0-99
Display: Red LED; 7 digits
Count data: Total counts, counts/ft3, counts/m3
Coincidence: <5% at 400,000 particles/ft3
Printer: Built-in
Power: 100, 115 or 230VAC, 50/60 Hz
Weight: 24 pounds (11 kg)
Size: 11.2"W x 18"D x 6"H (28.4W x 45.7D x 15.2H cm)
Output: RS-232C/RS-485 for computer
Included with unit: Isokinetic probe, purge filter, printer paper, manual, power cord

When ordering, please specify:
Min. threshold size: 0.3 or o.5 microns
Number of channels: 2, 4, 5 or 6
AC voltage: 100, 115 or 230 VAC
Size option: 25 microns (BSS295)

MET ONE 3400 Series

Portable Air Particle Counter

Newest shape in portable airborne particle counting. 50 or 28.3 LPM (1.77 or 1.0 CFM) flow rate with 0.3 to 25 micron sensitivity. Uses Long Life Laser™ technology. Features strategically-placed carrying handles and an easy-to-wipe-down stainless surface. Operates from AC power or rechargeable long life batteries.

50 or 28.3 L/min (1.77 or 1.0 CFM) flow rate
Long Life Laser technology
21 CFR Part 11 support with PortAll Version 2

MET ONE 237A/237B

Portable Air Particle Counter

Monitors six different size ranges simultaneously. Count data displays on the front-panel as total number of particles (cumulative count) or the particles in each size range (differential count). Offers four modes: Manual, Auto, Concentration, and Beep.

Six particle size channels
Cumulative and differential counts from the built-in printer
Compatible with PortAll Version 2 software

MET ONE R4815/R4915

Remote Air Particle Counter
Met One 4815/4915

Compact counters conveniently mount around a clean room with vacuum source, DC power and a communication line. Stainless steel and no fan means counters may be placed close to process areas. User-programmed alarm levels trigger a flashing LED and alarm signal.

Long Life Laser technology
Compatible with both Ultra Vision Online and Particle Vision Online
Select RS-485 communications (R4815) or 4-20 mA interface (R4915)