Products/Proximity Warning Core
Tag-based proximity warning

Proximity Warning Core

The tag-based proximity warning system trusted on over 1,500 sites across 17 countries.

Overview

About Proximity Warning Core

A roller on a road building site with a SensorZone detection zone around it

Proximity Warning Core is the foundational system in the SensorZone product range. It uses RFID-based personnel tags and vehicle-mounted antennas to create a continuous, 360-degree detection zone around heavy machinery. When a worker wearing a tag enters this detection zone, the system triggers simultaneous alerts to the vehicle operator, the at-risk worker, and the surrounding area.

Designed for industrial environments where reliability, simplicity, and low maintenance are critical, Proximity Warning Core is trusted on sites around the world and has protected workers for over 140 million working hours.

At SensorZone, we believe that the hardware only forms half of the story. Central to the system is the site safety data that it produces, which enables true long-term behavior change and preventative action to be taken before an incident occurs.

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360°
Detection field around every vehicle
2-10 m
Configurable warning zones
3+ yrs
Tag battery life, no charging
1 hr
Installation per vehicle
How it works

How Proximity Warning Core works

01
Construction workers wearing SensorZone tags on their hard hats

Tag Assignment

Every worker gets a unique RFID tag that clips onto a hard hat or vest. Tags last 3+ years with no charging required, so workers just clip on and go.

02
A wheel loader surrounded by a detection zone at a waste transfer station

Vehicle-Mounted Detection

Antennas are magnetically mounted to each vehicle to create a detection zone(s). The zone is configurable from 2 to 10 metres for each vehicle.

03
A worker wearing a SensorZone tag, a vehicle antenna and the in-cab display

Triple Alert Activation

When a tag enters the detection zone, three alerts activate simultaneously: an in-cab alarm for the driver, a vibrating tag for the pedestrian worker, and an external beacon sounds for everyone nearby.

04
SensorZone Insights Platform dashboard

Data Logging

Every detection event is logged with timestamp, vehicle ID, and tag ID. The system data syncs in real time to the SensorZone Insights Platform, enabling unparalleled site safety insights and analytics.

Why Proximity Warning Core

Key features

360° Detection Zone

Our RFID technology detects tagged personnel in a complete 360-degree field around every equipped vehicle, even above and below.

Configurable Warning Zones

Set detection zones from 2 to 10 metres to fine-tune alerts for each vehicle type and work environment, and to eliminate nuisance alarms while maintaining safety.

Maintenance-Free Tags

The tags weigh under 40 grams and last 3+ years without charging or battery replacement. No docking stations, no daily charging routines, no extra administrative burden.

One-Hour Installation

Vehicle units install in under 60 minutes with no specialist tools or vehicle modifications. Magnetic mounts and simple wiring mean your fleet stays productive during rollout.

Fleet Scalability

Start with one vehicle and scale across your entire fleet. Each additional unit installs independently with no network infrastructure required. Tags work across all Proximity Warning Core-equipped vehicles automatically.

Works in All Conditions

Our IP67-rated hardware operates reliably from -20°C to +60°C. Tag detection works in dust, rain, fog, and darkness, and can detect people through objects and around corners.

Insights Platform

Turn safety data into actionable insights

Proximity Warning Core connects seamlessly with the SensorZone Insights Platform, a cloud-based dashboard that turns raw proximity data into meaningful safety intelligence for your entire operation.

Real-Time Dashboard in the SensorZone Insights Platform

Real-Time Dashboard

Monitor live events, alerts, and system status across all your sites from a single cloud-based platform.

Heat Maps in the SensorZone Insights Platform

Heat Maps

Visualize high-risk zones and incursion hotspots on interactive site maps to identify where safety interventions are needed most.

Catch Outliers Early in the SensorZone Insights Platform

Catch Outliers Early

Intuitive graphs and charts make it easy to see which workers are causing the most risk, and track their performance over time.

Tackle Behavioral Drift in the SensorZone Insights Platform

Tackle Behavioral Drift

Ensure that safety behavior on site doesn't regress in the months after implementation with our advanced drift analysis tools.

AI-Powered Analysis in the SensorZone Insights Platform

AI-Powered Analysis

Our platform AI will analyze your safety data to surface patterns, predict risk areas, and deliver actionable recommendations for continuous improvement.

Near-Miss Reporting in the SensorZone Insights Platform

Near-Miss Reporting

Capture every proximity incursion automatically, with no manual forms needed. Build a comprehensive near-miss database for audits and analysis.

Specifications

Technical specifications

A SensorZone Proximity Warning Core RFID personnel tag
Detection Technology
Active RFID
Detection Range
2–10 metres (configurable)
Detection Field
360°
Tag Battery Life
3+ years (no charging)
Tag Weight
Under 40g
Installation Time
Under 1 hour per vehicle
Operating Temperature
-20°C to +60°C
IP Rating
IP67
Data Output
Insights sync, API
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Get more information

Are you interested in piloting Proximity Warning Core for your organization or work site? If you are, or if you just want to speak to a member of our team, please fill out the short form and we'll get back to you.

OfficesDublin, Ohio & Wimborne, UK
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FAQ

Frequently asked questions

See all proximity warning FAQs →
How long does Proximity Warning Core take to install?

Most vehicle installations are completed in under 60 minutes. The system uses magnetic mounts and simple wiring connections, so no specialist tools or permanent vehicle modifications are needed. Your fleet stays operational during rollout.

No. Proximity Warning Core personnel tags use long-life batteries that last 3+ years without any charging or replacement. There are no docking stations to manage and no daily routines for workers to remember.

All personnel in the detection zone need to wear tags in order to be detected. If you need to detect untagged people as well, consider Proximity Warning Plus (which combines tags with AI cameras) or Vision360 (camera-only detection).

Each site will have a Tag Test Unit, which allows workers to check that their tags are working as expected. The unit will flag if a tag battery is running low so you can replace it proactively.

Yes. Each vehicle unit is configured independently, so you can set a larger detection zone for dump trucks and a tighter zone for forklifts. Zones are adjustable from 2 to 10 metres.