Start with the job each one does
Access control decides who gets in. Alarms detect and signal that something has happened. Body-worn cameras record what a guard sees and does. None of them stops a determined offender by itself, and each needs people and procedure behind it.
Access control
Access control covers anything that limits entry: keys, codes, cards, tags, fobs, intercoms, boom gates and biometric readers. Its value is in knowing who went where, and being able to withdraw access when someone leaves.
Its weakness is people. Cards are shared, doors are propped open, and visitors tailgate. Pick a system that logs entries, can cancel a credential quickly, and has a manual fallback for power cuts.
- Good for: offices, estates, warehouses, buildings with many users.
- Falls short when: credentials are shared or never cancelled.
- Ask: what happens when the power fails?
Alarm systems
An alarm detects intrusion, fire or a panic call, and sounds a siren, signals a control room, or both. The siren alone deters some offenders. The signal matters only if someone responds.
False alarms are the common failure. Poor installation, pets and open windows cause most of them, and a company that ignores repeated false alarms wastes its response time. Test the system regularly, and look at what the alarm is connected to and who answers.
- Good for: empty premises at night, homes, shops.
- Falls short when: nobody responds, or users forget to arm it.
- Ask: who responds, how are they contacted and what do they do on arrival?
Body-worn cameras
A body-worn camera records video and sound from the guard's point of view. It can calm confrontations, because people behave differently when they know they are recorded, and it gives you evidence if there is a dispute about what happened.
It also raises privacy questions. Recordings of people are personal information under the Protection of Personal Information Act (POPIA), so decide who may view them, how long they are kept, and tell the public that recording is taking place. Take advice on your obligations under POPIA before you introduce them.
- Good for: public-facing posts, events, retail and sites with frequent disputes.
- Falls short when: footage is never reviewed or retention is undefined.
- Ask: who holds the footage and for how long?
How they work together with guards
Technology gives the guard better information, and the guard gives the technology a response. An alarm with no response is a noise. A guard with no access control is a gate with a person in front of it. Use each where it fits your risk assessment, and not all three everywhere.
Costs you do not see on the quote
The purchase price is the smaller part of cost. Access control needs someone to add and remove users. Alarms need monitoring and response fees, battery replacement and regular testing. Body cameras need storage, charging, docking and someone to review footage.
Ask for a three-year cost, including software licences, maintenance and call-outs, and compare on that, not on the installation price.
Testing and fault logs
Equipment that fails silently is worse than none, because it gives a false sense of safety. Set a test routine: check that doors lock, that the alarm signal reaches its destination, that cameras record and that footage can be retrieved.
Keep a log of faults and repairs. If a device is down for days, treat the gap like an unmanned post and cover it with extra patrols.
What to ask before you buy
Use this list with any supplier.
- What risk does this deal with, and what is left over?
- Who looks at it, who responds and how fast?
- What happens in a power cut?
- What is the total cost over three years, including maintenance?
- Is the installer or the provider registered with PSiRA where required?
Questions people ask
Which one should I buy first?
Let a risk assessment decide. For many small sites an alarm with a reliable response is the first step, while larger sites often need access control first.
Do body cameras need consent?
Recording people is regulated by POPIA. Consent is one lawful basis, but section 11 also allows processing that is needed for a legitimate interest, such as protecting people and property. Either way, people must be told they are being recorded (section 18). Limit access to footage, define how long it is kept and get advice for your case.
Can cameras replace guards?
Rarely. Cameras record and detect. A guard can deter, challenge and call for help in real time.
Sources
Mtunzini Group is a family-run, PSiRA-registered guarding company in Cape Town that actively manages its officers with field supervision.