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Looking for True Precision or
Would You Rather Fail Opacity Audits? For Fast answers use our Online Sales Request information form!
In today's regulatory climate, nobody should fail opacity audits because of improper Opacity audit devises, but they do.
Crude opacity audit jigs with sloppy alignment, finger adjusted irises, slipping thumb wheels, out of date or uncertified neutral density filters, and a host of other problems contribute to inaccurate specifications for COMS.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 opacity audit device is made of carefully machined parts, then hand assembled and tested. Install it on your monitor, turn the precision knob until the exact desired reading is reached, and lock it down. It will withstand vibrations, bumping, or brushing and the iris won't move.
Insert our NDF's with confidence because they are NIST traceable and fully certified. Each filter is serial numbered and comes with it's own scanned trace which is dated, signed and showing its value in both optical density and opacity.
Neutral Density Filters
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
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.
Nominal Density (O.D.) |
% Opacity |
| 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 |
Top
"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.
Device Line |
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Audit device for Lighthawk 560
P/N 2786, Complete kit including Audit device, 3 filters in carrying case with certificates.
Device Line |
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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.
Device Line |
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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. Device Line |
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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.
Device Line |
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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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