Neutral Density Filters
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In todays regulatory
climate, nobody should fail audits because of improper audit devises,
but they do.
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| Crude
audit jigs with sloppy alignment, finger adjusted irises, slipping
thumbles, out of date or uncertified neutral density filters, and a
host of other problems contribute to inaccuracy specifications for COMS. |
| With EMS's new revolutionary line of
"Mico-turn" COM auditing devices for EMS, DYNATRON & LS 541,
LAND, RM 4100-4500 , USI, TECO, DURAG & ENVIROPLAN and Opacity
audit filters, you can be assured of the utmost precision in the
industry today. Each audit device is made of carefully machined parts,
hand assembled and tested. Install it on your monitor, turn the
precision knob until the exact desired reading is reached, and lock it
down. Vibrations,Bumping it, or brush it, the iris won't move |
| Insert
our NDF's with confidence because they are NIST traceable and fully
certified. Each filter is serial numbered comes with it's own scanned
trace, signed, dated scanned, and shows the value in both optical
density and opacity. |
Neutral Density
Filters
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Environmental Monitor Service, Inc. manufacture
filters for use in all the most popular Opacity monitors for EPA audits
and service. Our filter certification service sets the standard in the
industry for speed and cost, call us today for details. Neutral density
filters are categorized by their optical density (D) which is defined
as: The logarithm to the base 10 of the reciprocal of the transmitted
radiant power (T).
D=log10 1/T
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EMS
filters are manufactured with high quality optical substrate material,
flatness of 3 to 5l per inch and parallelism of 3 arc minutes or
better. The values for filters are found in the table below.
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Nominal
Density (O.D.)
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%
Opacity
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| 0.02 |
5 |
| 0.04 |
8.8 |
| 0.1 |
20.57 |
| 0.2 |
36.9 |
| 0.3 |
49.88 |
| 0.4 |
60.19 |
| 0.5 |
68.38 |
| 0.6 |
74.88 |
| 0.7 |
80.05 |
| 0.8 |
84.15 |
| 0.9 |
87.41 |
| 1.0 up |
90 up
Special order |
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"Micro-Turn"
Com Auditing Devices
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Audit
device for EMS Opacity Monitors Model 1301, 1302 1303 & 1304
Opacity monitors.
P/N 1232, Complete kit including Audit device, 3 filters in carrying
case with certificates. |
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Audit device for Dynatron 1100M, 1100 and MC2000
opacity monitors.
P/N 1089, Complete kit including Audit device, 3 filters in carrying
case with certificates.
(LS541 kit, P/N 2408) |
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Audit device for LAND , RM 4100 - 4500 series opacity
monitors.
P/N 2400, Complete kit including Audit device, 3 filters in carrying
case with certificates. |
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Audit device for USI or TECO 400 & 400B opacity monitors.
P/N 2402, Complete kit including Audit device, 3 filters in carrying
case with certificates. |
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Audit device for Durag or Enviroplan CMOP 281
P/N 2403, Complete kit including Audit device, 3 filters in carrying
case with certificates.
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E.M.S Professional Opacity Audit System, P/N 1465
Recommended for EPA, Testing Co. and end user with several types of
monitors to audit. The professional audit system combines all the EMS
audit devices and filters in one convenient, light weight (10 lbs.)
16x12x5 inch carrying case. You will never again find yourself on a job
site with the wrong device or filters. |
