IFR Kneeboard 5225699-1 The 553 will alarm if

The 553 will alarm if the CO level exceeds 50-70 ppm for more than 5 minutes or will provide an instant alarm if CO spikes above 300 PPM within one minute

and ready for use

The Micro Switch TL Series toggle switches are sealed to military specifications

a Sheet Thickness "Go/No-Go" Gauge (880 G)

This NYLO-Seal male run tee (EDMO# 271N08X06) fits 1/2-inch tubing and has a 3/8-inch pipe thread

IFR Kneeboard 5225699-1 The 553 will alarm ifThe durable brushed aluminum IFR Kneeboard is a great way to organize your flight data, providing a strong surface for inflight note taking as well as quick access to important IFR information in the form of a permanent placard. This new version has updated information to reflect modern cockpit needs, including weather and flight planning resources, flight plan equipment qualifiers, IFR alternate requirements, reporting, lost communciations and more.