CD Analyzers

This device will provide real time monitoring for ambient CD levels in the air.

DRS Labs evaluated various devices and found this unit to provide overall ease of use for active air monitoring for all real life field applications.

There are color indicating tubes available from 0.025 to 1 ppm that require 10 to 30 pumps per sample. This may be time consuming and may require high quantities of tubes to test various areas. So in the long run it is cost effective to utilize the Interscan model. DRS Labs does not sell color indicating tubes or the required equipment to perform the tube sampling.

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EXPOSURE LIMITS

OSHA PEL – The current OSHA permissible exposure limit (PEL) for chlorine dioxide is 0.1 ppm (0.3 mg/m³) as an 8-hour time-weighted average (TWA) concentration [29 CFR 1910.1000, Table Z-1].

NIOSH REL – NIOSH has established recommended exposure limits (RELs) for chlorine dioxide of 0.1 ppm (0.3 mg/m³) as a TWA for up to a 10-hour workday and the short-term exposure limit (STEL) of 0.3 ppm (0.9 mg/m³) [NIOSH 1992]. The NIOSH limit is based on the risk of severe respiratory and eye irritation [NIOSH 1992].

ACGIH TLV – The American Conference of Governmental Industrial Hygienists (ACGIH) has assigned chlorine dioxide threshold limit values (TLVs) of 0.1 ppm (0.28 mg/m³) as a TWA for a normal 8-hour workday and a 40-hour workweek and a short-term exposure limit (STEL) of 0.3 ppm (0.83 mg/m³) for periods not to exceed 15 minutes. Exposures at the STEL concentration should not be repeated more than four times a day and should be separated by intervals of at least 60 minutes [ACGIH 1994, p. 15]. Rationale for Limits. The ACGIH limits are based on the risk of severe irritation and by analogy to the toxicity of ozone gas [ACGIH 1991, p. 257].

NIOSH IDLH – Documentation for Immediately Dangerous to Life or Health Concentrations (IDLH): NIOSH Chemical Listing and Documentation of Revised IDLH Values (as of 3/1/95) Chlorine Dioxide 5 ppm.