Adams Rite 4089 Exit Indicator - For Standard 1-3/4" Door

The Adams Rite 4089 exit indicator gives building managers and occupants an unmistakable visual read on whether an exit door is locked or open, directly from the door face. It fits standard 1-3/4" commercial doors and works across aluminum, hollow metal, and wood construction. No electronics, no batteries, no separate sensor. The indicator is driven mechanically by the lock bolt itself, so the display is always accurate. When the bolt throws, the word "LOCKED" appears in red letters on a white background. When the bolt retracts, "OPEN" shows in green letters. That direct feedback loop matters in buildings where exit door status affects occupant safety and code compliance.

When does a deadlock require an exit indicator to meet code?

Under many local building safety codes, a security deadlock may be substituted for a panic exit device on certain occupancy types, but only when the exit door status is clearly communicated to occupants. This is precisely what the 4089 is designed to solve. The unit ships with two permanent adhesive header signs for that purpose. The first sign, per Uniform Building Code, reads: "THIS DOOR TO REMAIN UNLOCKED DURING BUSINESS HOURS." The second, written for NFPA and other local codes, reads: "THIS DOOR TO REMAIN UNLOCKED WHEN THE BUILDING IS OCCUPIED." Both signs work in combination with the indicator's live bolt status display to satisfy the visual notification requirement many AHJs impose. Always verify specific requirements with your local Authority Having Jurisdiction before specifying this product as a panic device substitute. It's a straightforward compliance step that can significantly reduce hardware cost on qualifying openings.

Which Adams Rite deadlocks is the 4089 compatible with?

The 4089 works with a specific range of Adams Rite deadlocks and deadlatches. Compatible models include the 1830 series, MS1837, MS1850S, MS1850S-505, SCH1850S, MS1850SN, MS1850SN-505, SCH1850SN, MS1860, the 1870 flushbolt, and MS1890. If you're specifying the 4089 as a retrofit accessory or including it in a new hardware package, confirm your primary lock model falls within this list. The indicator is driven entirely by the bolt mechanism of the host lock, so it only functions correctly when paired with supported Adams Rite hardware. Matching the 4089 to an incompatible deadlock will result in a non-functional display. The Adams Rite MS1850 Series deadlocks are among the most common pairings, and the full range of compatible storefront bolts and latches is available on this site.

Finish matching and door thickness options for the 4089

The 4089 escutcheon is zinc alloy construction with a powder coat finish, and Adams Rite has matched the finish codes deliberately to their anodized hardware line. Finish 119 pairs with 335 black anodized. Finish 121 pairs with 313 dark bronze anodized. Finish 130 pairs with 628 clear anodized aluminum. This matters on glass storefront and aluminum door applications where visual consistency across hardware is expected. The standard unit fits 1-3/4" doors (44.5mm). For thicker doors up to 2-1/2" (63.5mm), specify accordingly when ordering. The wordless panel option (red for locked, green for unlocked) is available for facilities where text-based signage is not preferred or where multilingual environments make pictographic indicators more practical. All finish and door thickness variants are purpose-built accessories within the broader Adams Rite hardware ecosystem, designed to integrate cleanly rather than retrofit awkwardly.

The 4089 is a small accessory with a real compliance function. If you're specifying exit doors for schools, retail, or office occupancies where deadlock substitution is permitted, it's the detail that makes the full hardware package code-ready. Call 877-471-4870 to confirm compatibility with your specific lock model before ordering.