SiteZone PWS

The SiteZone Proximity Warning System (PWS) is an audible and visual warning system designed to reduce the risk of vehicle-personnel collisions and can be used anywhere the proximity of people and vehicles working together is of concern.

Key Benefits  

  •    Reduce the risk of vehicle - personnel collisions
  •  Create a safer workplace
  •    Complement existing safe systems of work
  •    Improve personnel awareness and affect behavioural change

Key Features

  •    Total warning solution
  •    Fully configurable to meet application requirements
  •    Cloud based analytics for monitoring the plant – personnel interface
  •    Reassurance of thousands of successful installations and millions of man hours worked

How does SiteZone work?

SiteZone PWS produces a detection zone around a vehicle, machine or even a restricted area.

When the detection zone is breached by personnel wearing a SiteZone transponder (tag) the machine operator is alerted to their presence and can take the appropriate action. The main function of SiteZone is to warn the machine operator to the presence of tag wearing personnel as he is the only person that can stop the machine. To provide an additional tier of protection there are optional warnings for pedestrians and others.

Key Components

SiteZone Base Station

Our base station generates a detection zone or bubble around the vehicle. The size of this bubble can be varied to meet site requirements.

  • Design allows for easy universal mounting
  • Single antenna option suitable for most machines
  • Robust field proven design

Operator Display Unit (ODU)/Warning Options

The ODU performs a range of functions including alerting the machine operator to zone breaches and controlling authorised approaches.

  • Different ODU options available dependent on vehicle type and application
  • All ODUs allow control of authorised approaches
  • Additional range of warning and alert devices available

Personal Transponders - Tags

SiteZone Transponders are designed to be an integral part of personnel's PPE. There is no need to recharge or replace batteries in the unit. SiteZone transponders are available in a range of options including a helmet mount vibrating version.

  • Maintenance free tamper proof design
  • High capacity battery - Minimum 2 year expected operating life
  • 10,000+ field units 
  • Range of wearable options

External Alarm/Beacon Combo

Our latest external alarm/beacon combo alerts any tag wearing personnel breaching a safety zone that they have done so allowing them to retreat to a safer location. It also alerts others to the fact there has been an exclusion zone breach.

  • Multi function including system active beacon,
    visual and audible alert
  • Choice of alarm tones to suit different working environments
  • Quick fit mounting

OverSite Telematics

The Oversite system elevates the SiteZone proximity warning system from a site based safety aide to a proactive safety management tool.

  • Real time reporting
  • Cloud based analytics
  • Monitor the interactions between mobile equipment and personnel
  • Identify those at greater risk and make positive interventions
  • Range of reporting options including Live Track

SiteZone Transponder Test Station

The SiteZone transponder test station allows uses to easily check that their transponder is working correctly.

  • Easy to use
  • Tag clash function
  • Keeps records of tests

SiteZone Options and Enhancements

SiteZone PWS is used across a wide range of industries and applications. To ensure it meets these requirements a range of additional options have been developed.

SiteZone EasyFit

Installed in typically less than 30 minutes the SiteZone EasyFit meets the requirements of the UK building and civil engineering market where most mobile plant is hired as required.


BucketZone allows for the creation of a separate detection zone around the working equipment of the machine. This can make the system more practical in certain applications. Useful for plant such as material handlers and loading shovels.

Zone Selector

Allows two preset ranges to be set on installation. The zone selection is via a supervisor key switch, allowing management controlled zone selection.

SiteZone Limiter

The SiteZone Limiter produces a “null zone” which “hides” SiteZone tag wearers from detection by SiteZone systems.This is useful when personnel are less vulnerable such as when they are travelling in vehicles or in areas segregated from moving plant

Frequently Asked Questions

You can purchase the SiteZone proximity warning system or alternatively the system can be hired through our national hire partner ESS Safeforce. We also offer competitive lease hire arrangements.

SiteZone generates an RF field (or bubble) around the vehicle. If the bubble is breached by a transponder wearing pedestrian then SiteZone generates appropriate alarms warning both the vehicle operator and pedestrian. This warning gives time for all parties to take the necessary actions. Multiple and concurrent breaches are recognised and all alarm events are data logged.

We use our unparalleled applications knowledge to help our customers successfully implement SiteZone into their site operations. Thousands of installations have been completed to date on a wide range sites.

All tags are tamper-proof with no user serviceable parts.  The long battery life and rugged construction provides reliable operation and removes the need for rechargeable or replaceable batteries.

SiteZone is recommended for use wherever there is a safety concern and incident potential between personnel and vehicles. See the Sectors for more information.

We have deployed SiteZone on vehicles from small forklift trucks all the way up to a 160 tonne crane and every type of mobile plant inbetween.

Is your workplace safe?

There are simple and effective steps that can be taken to improve the safety of the plant - personnel interface. Think safe site, safe vehicle, safe pedestrians.