Buy Alarm Accessories in South Africa - Sensors, Remotes & Sirens at Communica

Alarm Accessories for Every Security Need

Upgrading or maintaining your security system? At Communica, you can source a complete array of alarm accessories for homes, small businesses, campuses, and larger SA facilities. The right add-ons-like passive infrared (PIR) motion sensors, glass break and shock detectors, sirens, batteries, or keyfobs-ensure your alarm works reliably and covers every risk point.

Why Choose Communica for Alarm Accessories?

• Extensive local stock in Gauteng and Western Cape, ready for project deployment or urgent replacements.
• Direct collection from Samrand HQ or branches, plus VAT-compliant invoicing for security professionals.
• A wide range of brands and form factors to suit new installations and system upgrades.

Core Types of Alarm Accessories Stocked

Communica also carries repeater modules, wireless bridges, tamper switches, power supplies, and cabinet enclosures, so you can cover less-common scenarios or expand on existing solutions.

Compatibility and Selection Advice

• Most wired sensors use standard NC/NO relay contacts and 12V power-verify voltage before installation.
• Wireless add-ons (remote controls, PIRs) are panel-specific; match brands/models or review datasheets for cross-compatibility.
• Sirens available for internal or outdoor mounting, with power levels from ~100dB and up.

Need project assistance? Most commonly used alarm accessories are stocked for same-day pickup or regional delivery, including for school, office, or retail builds. Educational and industrial buyers benefit from VAT-invoicing and product support at branches.

How to Order and Typical Scenarios

Whether replacing a single faulty sensor or specifying parts for a new alarm install, Communica supports both retail and account purchasing. Check real-time product stock online or in-store and select pickup at Samrand, Pretoria, or Cape Town branches. For large sites or institutional orders, request a VAT invoice or formal quote from the team.

Example: Upgrading A Small Business Alarm System

• Add smoke/shock detectors to storerooms (available in-wire or wireless variants).
• Upgrade backup to a 12V, 7Ah lead-acid battery for 6+ hours runtime during load shedding.
• Supplement entrance sensors with additional perimeter magnetic contacts for roller doors and windows.

Example: Student Project Applications

• Integrate NC/NO alarm contacts into IoT builds for SMS or app notifications.
• Connect PIRs and magnetic switches to Arduino or Raspberry Pi boards (low-voltage relay output models stocked).
• Test and measure with bench supplies and DMMs from the tools range.

Choosing the Right Accessory-Quick Tips

• Double-check supply voltage (commonly 12VDC/9VDC) and output type (relay, transistor, or open-collector).
• Pair wireless gear (remotes, detectors) by frequency and system compatibility. Avoid "universal" remotes unless system supports them.
• No hardwiring? Look for battery-powered or plug-and-play wireless modules.

If you're upgrading existing infrastructure, bring in your alarm panel/model details for in-branch assistance. Communica technicians can help compare datasheets to find drop-in replacements or compatible add-ons across major brands.

Explore Related Categories

• Security, Access Control & Surveillance
• Connectors & Wiring Accessories
• Shop by Brand

Sources

• Communica: Branches & Trading Hours
• Communica: Security, Access Control & Surveillance Category
• Communica: Shop by Brand Index
• Texecom: Alarm Sensors Product Range
• Paradox: Alarm Accessories