Copeland & Son Air Conditioning and Heating Service has certified technicians to take care of your Furnace installation near Franklin TN.
With Copeland & Son, you can feel good about feeling comfortable
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(615) 244-9520
2510 Eugenia Avenue Nashville, TN 37211

CO Monitor Comparison


Carbon Monoxide Monitor Comparison

UL Listed Alarms

Low Level Monitors
NSI 3000
Low Level Monitor
Professional grade sensor




1st visual readout at 5 ppm within 30 seconds X
Low audible alarm level at 15 ppm after 5 minutes     X
High level audible alarm at 35 ppm after 5 minutes     X
Crisis audible alarm level at 70 ppm after 30 seconds X** X X
Manual silence button at low levels   X X
Cannot be silenced at crisis levels     X
Protection for all ages   X X
Digital memory with recall X* X X
Continuous on-screen display     X
Digital CO readout X* X X
CO display range from 5-999 ppm     X
Battery operated X* X X
Can be installed at eye level X* X X
Can be converted to tabletop use   X
Sensor can be checked with match smoke   X X
User response instructions printed on unit     X
Minimum 3-year warranty X*   X
Maximum protection for all age groups     X
Notes: ppm = parts per million ** - Allowed to take up to 240 minutes to alarm * - Available only on a few models