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Established in 1984, Crosby Intruder Alarms has developed into one of Merseyside’s premier independent security alarm companies.
We now have installations throughout the UK and can offer a full installation and back-up service nationwide. We only use the finest quality products and pride ourselves on the quality of our installation. The company has an interesting history from it’s inception in 1984 and maintained steady growth to become a leader in it’s field.
On the 2nd January 2024, Crosby Intruder Alarms celebrated 40 years in business! Read More
It is with a deep heart that we have to announce the passing of one of the company partners, Roy Williams who sadly lost his battle to COVID-19 on the 17th April 2020.
As you may have heard on the news, the Analogue Phone Network known as PSTN Telephone Lines are due to be switched off in the UK in December 2025. However, you need to ACT NOW!.
We offer a range of state-of-the-art solutions in the security industry. Click on an area of expertise below for further details.
The best deterrent for unwanted intruders to your home or business. Installed by our uniformed, police-checked, vetted and qualified Technicians.
CCTV is a fantastic visual deterrent & can be used to check incidents and security breaches. All our CCTV systems are quality branded makes.
Access Control Systems prevent unauthorised visitors accessing sensitive areas. Our Access Controls are quality brands fitted by Qualified Technicians.
Out Uniformed, Police Vetted & Qualified Technicians install the finest range of products available in the fire detection market today.
We supply, commission, maintain and install branded Aid-Call Wireless Nurse Call Products. Crosby Intruder Alarms only fit quality brands and products.
Smokecloak rapidly fills an area with a dense smoke (vapour) in the event of intrusion, causing confusion and visibility issues for intruders.
Public Address and Music Systems can be used to provide audio/music channels. Only the best brands are considered by Crosby Intruder Alarms.
From the smallest computer network to the largest multi-switch network across a large office block or building. We only use high quality cable.
Emergency Lighting is essential for any means of escape route within the property and ensures the safe evacuation from a building during low light conditions.
Check our Services page for a full list of our offerings and our Products page for the state of the art branded equipment we can offer.
We offer third party services to repair systems installed by other companies.
Supporting Park owners and Individual unit owner with Cloud monitoring sytems.
Check out our online support centre for FAQs, Documentation, and Downloads
With the economy in worsening shape due to the pandemic, crime is increasing. Don’t become another crime statistic. Protect yourself, your family and your business.
* Statistics from the Office of National Statistics Police Force Area Data Tables for year ending December 2025.
We are excited today to launch our latest Special Offers. Offer 1 is for our HKC SecureHub with a Wireless Video Doorbell Included. Offer 2
Why We Don’t Hide CCTV Cables in Your Walls At Crosby Intruder Alarms, we pride ourselves on providing top-quality security solutions that are both effective
Peace of Mind with Crosby Intruder Alarms: Protecting Homes and Businesses in Merseyside and Beyond For over 40 years, Crosby Intruder Alarms has been a
