Design Hardware Exit Alarm Kit for 2000 Series Exit Devices

Match the kit length to the device length. The ALK-2000 33 inch kit is for standard length 2000 Series exit devices, and the 42 inch kit is for long devices. Those are the only two lengths made, so measure the device already on the door before ordering.

A cylinder is included. The ALK-2000 ships with a 1-1/8 inch mortise cylinder with standard cam, 6 pin brass, C keyway, and two keys. If you key your building on small format interchangeable core, the kit also provides a 1-3/8 inch mortise cylinder housing that takes a 6 or 7 pin SFIC core, and that core is supplied separately, so order the core in your facility's keyway.

It runs on a 9 volt battery, included, with a life of about one year. No wiring or power supply is needed to make it work. When the battery gets low the unit flashes red and chirps every 5 seconds, so a maintenance tech gets warning before the alarm goes dead.

If the door already has a Design Hardware 2000 Series device in serviceable shape, the ALK-2000 is the cheaper path: it mounts to the device you have and adds local alarm and key control without touching the door prep or the strike. Replacing the whole device only makes sense when the existing one is worn out or you need a different device type on the opening. This is a battery powered local alarm, not an access control tie-in, so it does not report anywhere.

The ALK-2000 will not serve you, since it is dedicated to Design Hardware 2000 Series devices. For an ED4000 or ED5000 surface vertical rod device, the Corbin Russwin 649F99 is the Grade 1 bottom rod and end pin assembly for that series. Exit device parts are series specific across every brand, so identify the device series stamped on the chassis before ordering any replacement piece.

No. The Corbin Russwin 649F99 is a bottom rod and end pin assembly for ED4000/ED5000 surface devices, so it is a latching component of a vertical rod exit device rather than an alarm. The Design Hardware ALK-2000 is an alarm kit built for 2000 Series exit devices and comes in a 33 inch length for standard length devices and a 42 inch length for long devices, with a 9 volt battery and a horn of approximately 90 decibels at 15 feet. If a rod is bent or the latch is not catching, a rod assembly is the part to look at; if the door needs to sound when it is pushed open, the alarm kit is. They are not interchangeable, and they are cut for different device families.

The BEST Precision KR822689 is a key removable mullion, 2 inch by 3 inch by 8 feet in an aluminum finish. It gives the pair a fixed strike point that a key removes when the full opening is needed, but it is a structural member for the opening and does not sound. The alarm has to come from the device itself, and on Design Hardware 2000 Series exit devices that is the ALK-2000 kit, ordered 33 inch for a standard length device or 42 inch for a long device. A mullion and an alarm kit solve two separate parts of the same opening and are commonly specified together on a pair of exit doors.

About 90 decibels measured at 15 feet. That is loud enough to carry down a corridor and be heard at a desk or nurse station, which is the usual reason it goes on a stairwell, storeroom or emergency egress door people keep using as a shortcut.

Standard duty. It suits normal traffic openings such as a stairwell, back-of-house or storeroom door in an apartment building, school or office. For an entrance taking heavy continuous abuse, spec the opening around a heavier duty device family instead.

It is not. The Design Hardware ALK-2000 is made for 2000 Series exit devices and mounts along the device, which is why it is sized 33 inch or 42 inch to the device length. A mortise opening is served by parts cut to that lock instead, such as the Corbin Russwin 499F83-8 Grade 1 door spindle for the ML2000 mortise lock series, or, on a deadlock, the Corbin Russwin 693F20-8 Grade 1 ANSI strike bolt for the DL3000 series with a 2-3/8 inch backset. Confirm which device is actually on the door before ordering, since the alarm kit will not adapt to a mortise case.