Security Alarm Accessories – Upgrade, Replace & Expand Your System

Looking for replacement alarm remotes, motion detectors, sirens, keypads, batteries or communication modules? Need a specialist alarm component, 4G communicator or connectivity upgrade for an existing security system?

Home Security Online stocks a wide range of genuine security alarm accessories, replacement parts and specialist security products from leading brands including Ness, Hills Reliance, Hikvision and Ajax.

Whether you're replacing a faulty component, expanding an existing alarm system, upgrading communications or sourcing a specialist detection device, we offer practical solutions at competitive prices, with fast Australia-wide delivery.

Alarm Accessories, Replacement Parts & Upgrade Components

Find the parts you need to maintain, repair or expand a compatible security alarm system, including:

• Alarm remotes, key fobs and wireless transmitters

• Motion detectors and PIR sensors

• Door and window reed switches

• Alarm keypads and touchscreens

• Internal and external sirens

• GSM, 4G and cellular communication modules

• Alarm batteries and replacement power supplies

• Wireless receivers and expansion modules

• Ethernet interfaces and alarm connectivity accessories

• Outdoor wireless keypads and access-control accessories

• Specialist vape and smoking detection devices

Specialist Alarm Products & Communication Upgrades

Need something beyond a standard alarm accessory? Explore specialist products designed to extend the functionality of compatible security systems and address specific installation requirements.

Ness Bridge Ethernet Interface Gen2 106-018

Explore a 4G communication option for compatible alarm systems. The embedded Telstra SIM makes this a useful option to investigate when upgrading communications on supported systems. Check alarm panel compatibility and reporting requirements before ordering.

Ness Bridge Gen2 Ethernet Interface

Looking to connect a compatible Ness alarm system for remote access and app-based functionality? The Ness Bridge Gen2 provides an Ethernet interface and supports compatible Ness systems and the Ness Mezzo app. Check system compatibility before purchasing.

Ajax KeyPad Outdoor Jeweller – Wireless Outdoor Security Keypad

Need keypad access outdoors? The Ajax KeyPad Outdoor Jeweller is a wireless outdoor keypad designed for compatible Ajax security systems. It offers an additional access-control option where an outdoor keypad is required.

Takex VS-1000E Vape & Smoking Detector

For applications where vaping and smoking detection is required, the Takex VS-1000E is a specialist detection device worth considering. It is a powered detector with alarm and relay outputs for suitable installations. It is not a substitute for a certified smoke alarm.

Why Buy Alarm Accessories from Home Security Online?

• Competitive prices on genuine branded security products

• A broad range of replacement parts and specialist components

• Products from established brands including Ness, Hills Reliance, Hikvision and Ajax

• Help identifying suitable products and checking compatibility

• Convenient online ordering and fast Australia-wide delivery

We supply products to homeowners, businesses, installers and customers maintaining or upgrading existing systems. As an online reseller, we provide product-selection and compatibility assistance but do not offer installation, servicing or on-site visits.

Frequently Asked Questions

Are security alarm accessories universal?

No. Alarm accessories are not always interchangeable between brands or models. Check the specifications and compatibility information for your alarm panel before ordering. If you're unsure, tell us what you need and include the model number or a photo of your existing equipment.

How do I identify the correct replacement alarm remote or keypad?

Check the model number on your existing remote, keypad or alarm panel. Similar-looking accessories may use different frequencies, protocols or connection types. Contact us with the model details if you need help identifying a suitable product.

Can I upgrade my existing alarm system?

In many cases, compatible existing systems can be expanded or upgraded with new keypads, sensors, communication modules and other accessories. Explore our alarm upgrade kits or contact us for help identifying suitable options for your system.

Can I upgrade an alarm system to use 4G communications?

Some compatible alarm systems can use a 4G communicator or communication module, but compatibility depends on the alarm panel, reporting format, mobile network and monitoring requirements. Check the product specifications before purchasing.

Do you sell specialist security detection products?

Yes. Our range includes specialist products such as the Takex VS-1000E vape and smoking detector, alongside conventional alarm accessories and communication products. Check each product listing for power, connection and installation requirements.

What alarm accessories are commonly replaced?

Batteries, remotes, motion detectors and keypads are common replacement items. Communication modules and other components may also need upgrading as equipment ages or connectivity requirements change.

Do you ship alarm accessories Australia-wide?

Yes. Home Security Online supplies security alarm accessories and specialist components to customers across Australia, with fast dispatch and delivery.

Need Help Finding the Right Alarm Part?

Not sure which remote, sensor, keypad, battery or communication module you need? Tell us what you need and provide your alarm brand, model number and, if possible, a photo of the existing equipment. We'll help you identify suitable products before you order.