The STI STI-7531 is a clear polycarbonate protective cabinet with backplate and thumb lock, sized for larger wall-mounted devices. First, the installer mounts the backplate on the wall. Then the hinged clear cover locks with the exterior thumb lock. As a result, the STI-7531 protects a fire alarm control panel or annunciator without requiring a key for routine access.
What the STI STI-7531 is built for
Fire alarm panels and remote annunciators need protection from vandalism, dirt, dust, and grime. However, key-managed cabinets create operational friction for authorized staff. Therefore, the STI-7531 substitutes a thumb lock for the key, keeping access controlled but not dependent on a key.
Verified STI STI-7531 specifications
- Type: Polycarbonate protective cabinet with backplate and exterior thumb lock
- Cover: Clear polycarbonate; UV-stabilized
- Lock: Thumb lock plus additional eyelet for a secondary safety seal
- Internal dimensions: 12" x 14" x 6.37"
- Polycarbonate working range: -40° to 250°F (-40° to 121°C)
- Included: Mounting hardware and gasket
- Warranty: Three-year guarantee against polycarbonate breakage in normal use; one year on electromechanical and electronic components
When the STI STI-7531 is the right choice
Specifically, the STI-7531 fits installations where authorized staff need quick repeat access. For example, a remote annunciator at a security desk. In addition, the secondary eyelet supports a tamper-evident seal when key control is required as well.
Application context
For installations needing key-only access, choose the STI-7530 sibling instead. Therefore, decide lock style first. Also, the STI-7531 is a mechanical accessory and is not itself a listed fire alarm component.
Need help selecting the right STI cover or enclosure for your installation? Our team supports thousands of commercial fire alarm jobs every year. Call us at 1-888-557-0558 or email sales@lifesafetycom.com for application guidance, lead-time updates, or volume pricing.
Additional information
| Weight | 12 lbs |
|---|---|
| Dimensions | 18.5 × 18 × 9.5 in |
| Condition | New |
| Manufacturers | STI |
| Part Type | Smoke Detector |
| Key Features | Search page, STI Global (Americas) Safety Technology InternationalCompareMy ListProductsFire Products, Alarms, Buttons &, Switches, Enclosures &, Covers, Wire Cages, Wireless Products, Build It Configurators |
| Dimensions | 1200×630. |







