Kidde 21009942 Carbon Monoxide Monitor Low Level Co

Product Description

The KIDDE 21009942 is an ultra-sensitive carbon monoxide monitor designed to detect low CO concentrations that standard CO alarms may not register. Using an electrochemical sensor specific to CO, the unit continuously samples ambient air and displays real-time CO readings as low as 10 PPM on its built-in digital display. The display refreshes every 15 seconds so technicians and occupants can track whether levels are rising or stabilizing. Battery operated on three AA batteries (included), the monitor maintains protection during power outages. It is intended for installation by licensed trades or knowledgeable end users in residential settings where occupant health sensitivity makes early CO detection critical.

This monitor is suited for residential applications where occupants may be elderly, pregnant, or have pre-existing respiratory or cardiovascular conditions that increase sensitivity to CO at sub-alarm concentrations. It provides audible and visual notification when CO levels fall below 30 PPM, a threshold below the trigger point of standard CO alarms. The unit functions as a supplemental monitoring tool alongside conventional smoke and CO alarms rather than as a standalone life-safety replacement. Typical install locations include bedrooms, living areas, and spaces adjacent to fuel-burning appliances where low-level CO exposure is a concern.

Key Features

• Electrochemical CO-specific sensor detects concentrations as low as 10 PPM
• Digital display refreshes every 15 seconds for continuous real-time CO level readout
• Audible and visual alert triggers below 30 PPM for early low-level notification
• Peak Level Memory retains the highest CO concentration recorded since last reset
• Hush Mode allows temporary silencing of low-level warnings via Test/Reset button
• Battery Lockout System prevents closing battery compartment without batteries installed
• 10-year end-of-life warning alerts when the unit should be replaced after a decade of service

Compatibility

Designed as an OEM-style supplemental CO monitoring device for residential environments; intended to complement existing smoke and CO alarm systems rather than replace listed life-safety alarms.

Installation Notes

Installation is typically performed by licensed electricians, HVAC technicians, or qualified homeowners following local building codes and manufacturer placement guidelines. No power shutdown is required for battery-only installation, but ensure the battery compartment is fully closed and the unit passes its self-test before considering installation complete. Position the monitor per manufacturer height and location recommendations relative to fuel-burning appliances. Do not install in locations subject to temperatures outside the rated 40 degrees F to 100 degrees F operating range, such as unheated garages or unconditioned attic spaces.

Technical Specifications

• Sensor Type: Electrochemical (CO-specific)
• Detection Range: 10 PPM minimum display threshold; audible and visual alert below 30 PPM
• Display Refresh Rate: Every 15 seconds
• Battery Type: AA (3 required, included)
• Operating Temperature Range: 40 degrees F to 100 degrees F
• Service Life: 10 years
• Warranty: 10-year limited
• Listing: UL 2075

Standard Information

• Brand: KIDDE
• Manufacturer Part Number: 21009942