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Need recommendation for home CO detector, want ppm readout.

Looking for your recommendation for a replacement, want a ppm display to see how bad it is if it alarms.
Was thinking of going to Home Depot unless you know of something better. Not a heating guy so not really interested in a $300 pro model.
Last night my home CO detector failed and FALSE alarmed at 4 AM !!! Kiddie Night Hawk made in 2012. (Permanent alarm even when "aired out" for hour outside, and with new good bats. Other nearby CO detector did not alarm)
Was thinking of going to Home Depot unless you know of something better. Not a heating guy so not really interested in a $300 pro model.
Last night my home CO detector failed and FALSE alarmed at 4 AM !!! Kiddie Night Hawk made in 2012. (Permanent alarm even when "aired out" for hour outside, and with new good bats. Other nearby CO detector did not alarm)
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Comments
I've had them (four units) for two+ yrs now...
https://www.amazon.com/dp/B004Y6V5CI/ref=sxr_rr_xsim_1?pf_rd_m=ATVPDKIKX0DER&pf_rd_p=4518303533042278392&pd_rd_wg=jeOvW&pf_rd_r=E553XNR13QTME21TJH8X&pf_rd_s=desktop-rhs-carousels&pf_rd_t=301&pd_rd_i=B004Y6V5CI&pd_rd_w=QiYx8&pf_rd_i=co+detector&pd_rd_r=682060ea-d239-454e-9635-e6048f79614f&ie=UTF8&qid=1527093610&sr=1
For real time readings all the way down to 1ppm I use the Sensorcon Inspector.
https://sensorcon-sensing-products-by-molex.myshopify.com/products/portable-carbon-monoxide-detector-meter?utm_medium=cpc&utm_source=googlepla&gclid=EAIaIQobChMIwbzn7Kuc2wIVzSWBCh0Q1AwJEAYYASABEgIdnPD_BwE&variant=4193480964
Quite a few of the professionals here use the same CO meter on the job because they could potentially be walking in to a toxic boiler room, etc.
I leave mine on all the time in a prominent location just outside the kitchen. I've changed the battery once in 2+ yrs of use.
Rick
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me