VERIFIED · 2026 canonical · www.jaspecs.com

Kidde Carbon Monoxide Alarm, Battery Operated with Digital Display

Model number
KN-COPP-B

The Kidde KN-COPP-B (model 900-0146) is a discontinued battery-operated carbon monoxide alarm featuring a large backlit digital display — easy to read even in low light. It displays current CO concentration levels updated every 15 seconds, and includes peak level memory to recall the highest CO concentration measured since last reset. A front-load battery door allows battery changes without removing the alarm from the wall.

identifiers stable · addressable
Model no.
KN-COPP-B
Brand
Kidde
Category
Co Alarm Battery
Canonical URL
/kidde/co-alarm-battery/kn-copp-b-kidde-battery-co-alarm-digital-display-backlit/
Official page kidde.com →
22 spec rows · each row is anchorable

§ Specifications

#specifications
Product Type
Carbon Monoxide Alarm
Alarm Type
co
Sensor Co
electrochemical
Power Source
battery-aa
Battery Backup
No
Battery Type
AA
Battery Replaceable
Yes
Voice Alerts
No
Smart Wifi
No
App Connected
No
Digital Display
Yes
Low Level Co Alert
No
Explosive Gas Detection
No
Indoor Air Quality
No
Peak Level Memory
Yes
Hush Feature
Yes
Interconnect
No
Interconnect Type
none
Alarm Db
85
Ul Co
UL 2034
Warranty Years
10
Discontinued
Yes

§ What's Included

01 alarm unit
02 batteries
03 mounting hardware

§ FAQ

What is peak level memory on the KN-COPP-B?

Peak level memory records and displays the highest carbon monoxide concentration the alarm has detected since its last reset. This is useful for diagnosing intermittent CO problems — even if the CO source is gone, the peak level shows the maximum exposure your home experienced.

Is the KN-COPP-B still being sold?

This model has been discontinued by Kidde. Consider the COBD or COBD10 as current replacements that offer digital display and longer battery life.