CI-302

High Pressure Diffuser
Sampling High Pressure Air or Gases

The CI-302 High Pressure Diffuser is used when sampling pressurized air or gases with Climet particle counters or microbial air samplers.  Applying compressed air or gases directly to a particle counter or microbial sampler may cause damage to the instrument.  With particle counters it will also cause turbulence inside the sensor that produces false high counts.

The CI-302 works by regulating the flow rate with an exhaust port to provide a path for the excess air pressure. This allows the particle counter to "pull in" and regulate the flow into the instrument.

The low pressure end of the diffuser has a dual size outlet fitting.  This allows 1/2" or 3/8" tubing to be connected between the CI-302, and the particle counter inlet or microbial adapter inlet.  On the high pressure end, a 1/4" tube connection is compatible with a number of fittings. 

CI-302-2x :  VCO Fitting

where "x" is the orifice size.
Other connectors types available.  Call for details.

Common gases used in sampling are air, nitrogen, argon, helium and carbon dioxide.  The mass flow is affected by the density of the gases being sampled.  Air and nitrogen have virtually the same density.  However, argon, helium, and carbon dioxide have different densities that shift the air flow.  When sampling argon, helium and carbon dioxide it is highly recommended to have the particle counter or microbial sampler's flow rate calibrated for the particular gas being sampled. 

Compatibility

The CI-302 is compliant with ISO 8573-4. 

Interoperability is assured with all Climet microbial samplers, and particle counters (excluding the RS version).   When used with Climet microbial samplers, you will also need a High Pressure Diffuser Adapter Head (p/n: 01210109).

Connector Recommendations Based on Flow Rate

In general, the typical configuration is as follows:

In choosing the right High Pressure Diffuser (HPD) please follow the following steps:

Step 1.  Confirm the flow rate of the Climet particle counter or microbial sampler?  This is referred to as the "Low Pressure End".

Step 2.  Confirm the pressure of the gas being sampled? This is referred to as the "High Pressure End".  You will want to determine the gas pressure after the filter via the regulator.

Step 3.  The High Pressure End of the diffuser comes with an industry standard VCO fitting.  If you would like to use another type fitting, please contact us.

Step 4. Go to the appropriate chart (below) for the Flow Rate of the Climet particle counter or microbial sampler. (The 1 CFM, 50 LPM, 75 LPM or 100 LPM Chart)

Step 5. At the top of the chart is the pressure of the gas being sampled (Ref #2 above). Go to the appropriate column.

Step 6. Next, drop down to the blue rows for the part number for the fitting of your choice.  The number provided in the blue row is the maximum pressure on the low pressure side measured in Liters Per Minute (LPM).  Generally, you will choose the part number (Far left column) on the top blue row.  The number in the blue rows is the maximum pressure.

For example, if we have a 1 CFM (or 28.3 LPM) particle counter, and our gas source has a pressure of 30 PSI we will want to select Part Numbers CI-302-20 since this row has the lowest maximum pressure (37.8 LPM). Given the pressure source, this option is optimal as it results in the least amount of gas exhaust (37.8 LPM - 28.3 LPM = 9.5 LPM).  As you can see from the table, if you also have the ability to regulate pressure down from 30 PSI to somewhere between 20-25 PSI then a lower source pressure will also result in improved gas exhaust emissions.

If you have any questions or uncertainties, please contact us.

1 CFM (28.3 LPM) Particle Counters  
         Usable range and total gas consumption in LPM at each pressure

Pressure
PSIG / kPA
5 /
34.5
10 /
68.9
15 /
103.4
20 /
137.9
25 /
172.4
30 /
206.8
35 /
241.3
40 /
275.8
50 /
344.7
60 / 413.7 70 / 482.6 80
/551.6
90 / 620.5 100
/689.5
120 / 827.3 130 /
896.3
140 / 965.2 150
/1034
302-20       29.3 33.6 37.8 42.3 46.5 55 64.3 71.4 81.6 89.7 95 109 117 124 131
302-21   35.3 47.4 52.2 60.6 69.5 77.7 86.5 103 122 140.5 159.5 220 242 283 304 323 342
302-22 34.3 52.0 68.0 75.9 88.3 100.5 112.6 125.4 151 177.5 202.4 224 247 270 319 339 363 376
302-24 64.6 100.0 126.7 151.4 177.2 197.5

 

50 LPM Particle Counters: 
Usable range and total gas consumption in LPM at each pressure

Pressure
PSIG / kPA
5 /
34.5
10 /
68.9
15 /
103.4
20 /
137.9
25 /
172.4
30 /
206.8
35 /
241.3
40 /
275.8
50 /
344.7
60 / 413.7 70 / 482.6 80
/551.6
90 / 620.5 100
/689.5
120 / 827.3 130 /
896.3
140 / 965.2 150
/1034
302-20                 55.0 64.3 71.4 81.6 89.7 95 109 117 124 131
302-21 52.2 60.6 69.5 77.7 86.5 103 122 140.5 159.5 220 242 283 304 323 342
302-22     68.0 75.9 88.3 100.5 112.6 125.4 138.3 151.0 164.3 177.5 190.0 202.4 319 339 363 376
302-24 64.6 100.0 126.7 151.4 177.2 197.5                        

 

75 LPM Particle Counters: 
Usable range and total gas consumption in LPM at each pressure

Pressure
PSIG / kPA
5 /
34.5
10 /
68.9
15 /
103.4
20 /
137.9
25 /
172.4
30 /
206.8
35 /
241.3
40 /
275.8
50 /
344.7
60 / 413.7 70 / 482.6 80
/551.6
90 / 620.5 100
/689.5
120 / 827.3 130 /
896.3
140 / 965.2 150
/1034
302-20                       81.6 89.7 95 109 117 124 131
302-21             77.7 86.5 103 122 140.5 159.5 220 242 283 304 323 342
302-22       75.9 88.3 100.5 112.6 125.4 151 177.5 202.4 224 247 270 319 339 363 376
302-24   100.0 126.7 151.4 177.2 197.5                        

 

100 LPM Particle Counters and Microbial Samplers: 
Usable range and total gas consumption in LPM at each pressure

Pressure
PSIG / kPA
10 /
68.9
15 /
103.4
20 /
137.9
25 /
172.4
30 /
206.8
35 /
241.3
40 /
275.8
50 /
344.7
60 /
413.7
70 / 482.6 80 / 551.6 90 / 620.5 100
 /689.5
110 / 758.4 120 / 827.3 130 /
896.3
140 / 965.2 150
/1034
302-20               102 109 117 124 131
302-21                 122 140.5 159.5 220 242 263 283 304 323 342
302-22            112.6 125.4 151 177.5 202.4 224 247 270 296 319 339 363 376
302-24 100(1) 126.7 151.4 177.2 197.5 200                                  

(1) 12 PSI recommended to ensure an adequate performance margin.

 

 


Copyright © 2014-2015.  All Rights Reserved.
Climet Instruments Company
A Division of Venturedyne, Ltd.

Tel.+1 (909) 793-2788 | Email: sales@climet.com

PRODUCTS
Portable Particle Counters
Remote Particle Counters
Microbial Air Samplers
Compressed Gas Sampling
SUPPORT
Talk To An Expert
Calibration Request
Technical Library
RMA Request
Login
Firmware Update - Login
Product Registration
COMPANY
Contact Us
Careers
Events
Privacy & Legal Policy
Site Map
Customer Satisfaction Survey
ISO 9001 certification