Could the CO-Experts Low Level Monitor be too sensitive?

Hello Mr. Kerr,
I have read quite a bit if information you provided on your web page and I am yet undecided.  What protection from unnecessary low level signals does your product provide?  In addition, it seems to me that a low level CO detector might be a problem in an urban area where ambient CO levels may be in the 3 to 5 ppm range.  What do you think and why?
I want to protect my clients without causing some type of Chicago Effect in our county.  I am also charged with spending my program funds in a strategic manor.


Thank You, for both your interest in my Low Level C  O “Health” Monitor, and your excellent questions & concerns.
I carefully considered these same factors during the development of my Monitor.
First, I want to point out that the “Primary Cause” of the Excessive “False Alarms” experienced during the “Chicago Fiasco” were NOT due to Low Level of C O , they were because of a combination of a Long Period [almost 3 days] of 90% Plus Humidity due to Rain, Fog, Slightly above Freezing temperatures, resulting in a “Temperature Inversion” … and ESPECIALLY the use of the WRONG Type of Sensors and the use of Alarm “Time Delays”, … instead of “Time Weighted Averaging” as “Recommended & Implied” [but Not mandated due to a “Loop Hole”] in the UL-2034 Standard, 1992 Version that was then in use.
Also, VERY Importantly, the C O “Detectors” of those years Did NOT have Alarm “Reset” Buttons. [Please see the “Be Aware & Chicago Story” Sites on my Website.]
To AVOID any such Problems, my Monitor has the following Features.
1. I use the Best Industrial Type Electrochemical Sensor, which is the same Sensor that is used in Bacharach & Testo C O Testing Products. This Sensor is Not “Cross-Sensitive” to all of the various fumes & gases, or effected by Humidity Changes, as were ALL of the 1992 to 1998 UL-2034 Listed products.  Also, this type Sensor is Extremely Accurate, especially when used in conjunction with a 12 Bit, Micro-Controller, like the more expensive one that I use in my Monitor.
2. My Monitor provides not only a “Reset” Button, but also a Multi-Level “HUSH” Feature with automatic “Life-Safety” Over-ride Protection Features, as follows:
1. There is NO Audible Alarm below 10 PPM.
2. If my Monitor alarms at a “C O Present” Level between 10 PPM & 25 PPM,  by simply depressing the “Test / HUSH” button for 3 or 4 seconds, the alarm signal will be “HUSHED” for 12 Hours, to provide ample time to open doors or windows to ventilate, and / or contact your HVAC Contractor. If however, during this 12 hour “Hush” Period, the C O Level continues to rise, if it reaches 25 PPM, the Monitor Automatically “OVER-RIDES” the “Hush”, and re-alarms at the more Intense 25 PPM Level.
3. Between 25 & 50 PPM, the “HUSH” is for 60 minutes
4. Between 50 & 70 PPM, the “HUSH” is for  6 minutes.
5. At 70 PPM “HUSH” is only 4 minutes; however, IF this ever happens, the occupant should EXIT AT ONCE.
The Warning Levels were selected to provide “Legal Protection” for the Contractor; as well as the Consumer Safety, because the “Trial Lawyers” use the C O “Action Levels” in their Lawsuits:

1. ASHRAE: … If the C O Level “Inside” the house, Exceeds the Ambient C O Level “Outside” the house by OVER 9 PPM, it INDICATES a Problem that NEEDS to be Corrected. [ Over 9 PPM, ….. means …. 10 PPM.

2. ACGIH … 25 PPM, … for one hour, … EXIT.

3. OHSA … 50 PPM

4. UL-2034 – ’98 & CSA-6.19 – ’99 & ’01, … 70 PPM,  after one hour, … up to 4 hours. [240 minutes].

Please feel free to call me at 1-800-643-5377, or E-mail me with any questions you have.

Best Regards, …………………. George



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