Smoke Detectors
Showing Results for Smoke Detectors
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STI
SKU: STI-8200-W
STI Smoke Detector Damage Stopper® Flush Mount - - STI-8200-W
- 16-gauge cold-rolled steel cage resists physical damage and tampering in high-vandalism sites.
- Perforated matrix blocks pencil-sized intrusions while allowing full smoke reach to detector.
- Tool-free flush or surface mount over existing detectors; four-point fastening for quick access.
$70.50 $69.99 Save $0.51The item has been added -
STI
SKU: STI-8130
STI Smoke Detector Damage Stopper® with Conduit - STI-8130
- Polycarbonate shell blocks impact from tools and hardware during frame installation.
- Clear construction allows detector status verification without removing the stopper.
- No detector or frame modification required; mounts as a protective overlay with tamper-resistant fasteners.
$44.07 $27.99 Save $16.08The item has been added -
STI
SKU: STI-8230-W
STI Smoke Detector Damage Stopper® with Conduit Spacer - White Coat...
Protective housing for smoke detectors in high-traffic areas with integral conduit spacer
- 16-gauge cold-rolled steel cage with white polyester coat resists corrosion in wet areas.
- Perforated matrix maintains smoke detection sensitivity while blocking physical tampering.
- Four-point retrofit mount fits existing detectors with conduit spacer—no rewiring required.
$104.58 $66.99 Save $37.59The item has been added -
STI
SKU: STI-8100
STI STI-8100 Smoke Detector Damage Stopper Flush Mount Strike
Flush mount strike protects door hardware in access control systems
- Flush mount design integrates seamlessly into standard door frames
- Clear protective housing maintains visibility of strike mechanism
- Tamper-resistant fasteners included for secure installation
$35.35 $34.99 Save $0.36The item has been added -
STI
SKU: STI-8100-BK
STI STI-8100-BK Smoke Detector Damage Stopper Flush Mount
Flush-mount smoke detector enclosure with TCP/IP monitoring for secure access environments
- TCP/IP-enabled remote monitoring integrates with building management and security systems
- Flush mount design fits standard smoke detector installations without surface protrusion
- Tamper-resistant fasteners included; simple installation and removal for maintenance access
$37.30 $36.99 Save $0.31The item has been added -
STI
SKU: STI-8230-SS
STI STI-8230-SS Smoke Detector Damage Stopper with Conduit Spacer
Stainless steel smoke detector guard with integrated conduit spacer
- Stainless steel housing resists corrosion in kitchens, laundries, and humid spaces.
- Integrated conduit spacer eliminates separate hardware and reduces ceiling installation labor.
- Open guard geometry preserves detector airflow and optical path for reliable smoke response.
$164.50 $104.99 Save $59.51The item has been added -
STI
SKU: STI-9712
STI STI-9712 Steel Web Stopper for Photoelectric Smoke Detector
Patented steel web stopper shields photoelectric smoke detectors from tampering
- Patented steel web lock physically blocks detector removal and lens obstruction.
- Smoke entry and airflow remain unobstructed, preserving full detection sensitivity.
- Mounts to wall or ceiling at 4.62"×5.37"×3" with standard fasteners included.
$55.61 $35.99 Save $19.62The item has been added -
STI
SKU: STI-9713
STI STI-9713 Steel Web Stopper for Photoelectric Smoke Detector
Steel web protector for photoelectric smoke detectors in high-abuse areas
- 9-gauge steel web construction resists intentional damage in high-abuse environments.
- Rated -40° to 212°F with LLDPE coating; 304 SS variant supports washdown areas.
- Tool-free removal preserves routine detector maintenance without special procedures.
$47.62 $30.99 Save $16.63The item has been added -
STI
SKU: STI-9845
STI STI-9845 Smoke Detector Damage Stopper Controller
- Prevents tampering with smoke detectors in retail floors and access-controlled corridors.
- Compatible with System Sensor beam and detector units for integrated facility protection.
- Supports standard conduit routing and mechanical mounting for straightforward installation.
$40.87 $25.99 Save $14.88The item has been added -
STI
SKU: STI-9846
STI STI-9846 Smoke Detector Damage Stopper Controller
- Protects smoke detector integrity against tampering in security-critical installations.
- Compatible with System Sensor beam units and reflective mirror assemblies.
- Mounts via four #10 x 1.5" screws; clamp hardware positions on side, top, or bottom.
$72.95 $49.99 Save $22.96The item has been added -
System Sensor
SKU: 2151
System Sensor 2151 Photoelectric Low-Profile Plug-In Smoke Detector
Photoelectric smoke detector, 120VAC plug-in, low-profile ceiling mount
- Photoelectric sensing detects smoldering fires and visible smoke particles at 120VAC.
- Plug-in form factor mounts to standard 120VAC outlets, eliminating new hardwire runs.
- Low-profile 7.0 x 7.0 x 1.0 in. body fits tight retrofit spaces where hardwired units won't.
$106.05 $105.99 Save $0.06The item has been added -
System Sensor
SKU: 2W-B
System Sensor 2W-B Photoelectric Smoke Detector 24VDC
24VDC photoelectric smoke detector with 2-wire supervised circuit
- 2-wire supervised circuit cuts cable runs and conduit costs on large floor plates.
- 24 VDC operation integrates directly into standard building fire alarm power buses.
- Photoelectric sensing targets smoldering fires, reducing false alarms in kitchens and mechanical rooms.
$86.63 $55.99 Save $30.64The item has been added -
System Sensor
SKU: 2WT-B
System Sensor 2WT-B i3 Series Photoelectric Smoke Detector with The...
Networked photoelectric smoke detector with TCP/IP and NFC credentials
- Stop-Drop 'N Lock head separates rough-in from trim-out, reducing install labor.
- Built-in drift compensation and smoothing algorithms cut nuisance alarms in dusty spaces.
- Mounts to 3½-inch octagonal, single-gang boxes, or drywall anchors on 35VDC systems.
$95.03 $64.99 Save $30.04The item has been added -
System Sensor
SKU: 2WTA-B
System Sensor 2WTA-B i3 Series Photoelectric Smoke Detector with Th...
Dual smoke and heat detection on two-wire 35VDC loop
- Photoelectric and thermal sensing on a single 35VDC two-wire loop simplifies wiring.
- i3 drift compensation reduces false alarms in warehouses, offices, and mechanical rooms.
- Stop-Drop 'N Lock plug-in base enables fast field swap-outs without rewiring terminals.
$111.30 $76.99 Save $34.31The item has been added -
System Sensor
SKU: 2WTR-B
System Sensor 2WTR-B i3 Series Photoelectric Smoke Detector
Photoelectric smoke detector with TCP/IP networking and 35VDC operation
- Photoelectric sensing reduces nuisance alarms from dust and cooking smoke.
- TCP/IP communication integrates directly into existing Ethernet infrastructure.
- 35VDC operation simplifies retrofits; mounts to standard 3½-inch octagonal back box.
$123.90 $82.99 Save $40.91The item has been added -
System Sensor
SKU: 4W-B
System Sensor 4W-B Photoelectric Smoke Detector
4-wire photoelectric smoke detector for hardwired fire alarm systems
- 4-wire circuit separates power and signal, reducing false alarms in electrically noisy spaces.
- 35VDC operation matches standard FACP output—no external power conversion or added components.
- Mounts to a 3½-inch octagonal back box; fits wall or ceiling in 0°C–49°C environments.
$96.60 $64.99 Save $31.61The item has been added
Smoke Detectors
Commercial smoke detectors for addressable and conventional fire alarm systems. Photoelectric, ionization, and multi-criteria sensors provide early smoke detection with drift compensation and environmental adaptation for reliable performance in commercial spaces.
Plan Your Deployment
- Select detection technology: photoelectric for smoldering fires, ionization for fast-flaming, or multi-criteria
- Confirm detector base compatibility with installed SLC loop or zone wiring
- Evaluate sensitivity settings and drift compensation for the environment type
- Specify spacing per NFPA 72 for ceiling height and air-handling conditions
- Plan detector placement avoiding HVAC supply registers and dead air spaces
Smoke Detectors — Engineering-Grade Fire Detection for Commercial Deployments
This category covers 5 working models of smoke detectors sourced manufacturer-direct or through channel-direct US distribution. Build the rest of your system around the architectural choices below — compatibility, environmental rating, and lifecycle decisions made here propagate through every downstream component you specify.
What to Look For
Addressable versus conventional architecture is the first decision. Conventional systems group detectors into zones; addressable systems identify the exact device that triggered. For buildings above 10,000 sq ft or with more than 20 detectors, addressable saves substantial diagnostic time and meets most modern code requirements. Conventional panels remain economical for small commercial buildings and retrofits where new wiring isn't feasible.
UL 864 listing is non-negotiable for the panel; UL 268 for smoke detectors, UL 521 for heat detectors. The AHJ will reject anything else. Beyond UL, look for FM Approval and CSFM (California) listings — many jurisdictions accept only those. Confirm panel-to-detector compatibility within the manufacturer's listed combinations; mixing brands across UL listings voids the panel's certification.
Notification appliance circuit (NAC) capacity, voltage drop, and battery backup sizing drive panel sizing more than detector count does. ADA-compliant strobes draw 75-175 mA each — a 50-strobe building exceeds many small NAC ratings. Calculate total NAC load with voltage-drop budget for the longest run, and size standby battery for 24 hours plus 5 minutes alarm per NFPA 72.
Central station communication, networked panel federation, and graphical workstations matter most in multi-building campuses. Single-building panels typically dial a central station via cellular and IP; multi-building campuses run proprietary peer-to-peer networks (Notifier NFN, Siemens FN-2127, Edwards SIGA) with master annunciation. Plan the integration topology before ordering panels — head-end choice affects which compatible peripherals you can deploy.
Key Specs in This Category
| Spec | Available Options |
|---|---|
| Type | Carbon Monoxide Detector, Detector, Manual Fire Alarm Station, Explosion Proof, Switch |
Top Brands in This Category
Frequently Asked Questions
Do I need an addressable or conventional fire alarm panel?
Addressable panels identify the specific detector in alarm; conventional panels identify only the zone. NFPA 72 and most local codes require addressable for buildings above certain occupancy or square-footage thresholds, but the practical break-even is around 20-30 detectors. Above that count, addressable saves diagnostic and maintenance time. Below it, conventional is often the budget-friendly choice.
What's the difference between photoelectric and ionization smoke detectors?
Photoelectric detectors respond fastest to smoldering fires (cigarettes, electrical wiring); ionization detectors respond fastest to flaming fires (paper, kitchen). Modern dual-sensor detectors include both technologies and meet UL 268 7th edition requirements. Most jurisdictions now require dual-sensor or photoelectric for new commercial installations. Ionization-only is being phased out due to nuisance-alarm performance in cooking and shower-steam scenarios.
How often must fire alarm systems be inspected?
NFPA 72 requires annual inspection and testing of the entire system, semiannual battery testing, and monthly visual inspection of the panel. Local AHJ requirements often mandate documentation and a service contract with a licensed contractor. The owner-of-record bears legal responsibility for inspections — missing an annual inspection exposes the owner to fines and insurance claim denial.
Do I need a duct smoke detector?
Yes if the HVAC system exceeds 2,000 CFM (commercial threshold) — code requires duct smoke detectors that shut down the HVAC to prevent smoke distribution during a fire. Confirm CFM rating against local code thresholds; many jurisdictions require duct detection on smaller systems serving multiple-occupancy buildings. Duct detectors must report to the building's fire alarm panel.
What battery backup is required for fire panels?
NFPA 72 requires 24 hours of standby operation plus 5 minutes in full alarm. Calculate panel current draw under both conditions, then specify a battery with adequate Ah capacity. Lead-acid batteries lose capacity in cold environments — derate by 20% for unconditioned spaces. Replace batteries every 4-5 years even if they test good; failure rates climb steeply after year 5.
Need help choosing? Talk to a Senior Specialist — direct line 877-277-7147 or request a quote.