The Silent Knight SD500-LK upgrade kit converts an SD500-PS single-action pull station into a dual-action SD500-PSDA. The kit adds the lift-style dual-action hardware to the station front. As a result, occupants must lift first and then pull to initiate an alarm.
Dual-action operation cuts down accidental and malicious activations. Therefore, facilities like schools, dorms, and public corridors often upgrade single-action stations. Installation is shown on the Silent Knight SD500-PS/PSDA datasheet and installation documents.
What the Silent Knight SD500-LK Upgrade Kit Fits
- Converts the Silent Knight SD500-PS addressable pull station to dual-action operation
- Field-installed on the existing station — no full station replacement needed
- For IntelliKnight addressable systems using SD500-PS/PSDA stations
A note on older catalog copy: this kit was previously described as a duct detector upgrade. That was incorrect. The SD500-LK is a pull station conversion kit, per the Silent Knight SD500-PS/PSDA datasheet (P/N 350342).
Order the Silent Knight SD500-LK Upgrade Kit
Life Safety Consultants stocks genuine Silent Knight replacement parts. To order the SD500-LK or check compatibility, call 1-888-557-0558. You can also email sales@lifesafetycom.com.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 0.2 × 6 × 5 in |
| Condition | New |
| Manufacturers | Silent Knight |
| Part Type | Duct Detector |







