Forklift proximity detection systems

A proximity detection system puts a ranging unit on the forklift and a tag on every person who enters the operating area, then measures the distance between them continuously. Cross a configured threshold and both sides get warned, the operator in the cab, the pedestrian on the tag, and the stronger systems cut the truck’s speed automatically. It is the control that works when the person is exactly where a camera cannot see them: behind racking, around a blind corner, inside a trailer.

How the ranging works

Most current systems use ultra-wideband (UWB) radio, which measures range to roughly ±10 cm and passes through the shelving and product that block line of sight, vendors in this family, such as ELOKON’s ELOshield, describe configurable warning and protection zones that follow the truck. Trio Mobil also ranges by UWB, describing distance measurement between trucks and tagged personnel at blind corners and behind racking, with a tagless camera layer on the same platform. A second approach uses low-frequency magnetic fields, HIT-NOT’s approach, which the vendor positions as unaffected by obstructions and reliable in metal-dense environments where radio behaves unpredictably. Both approaches share the defining trait of this category: detection is mutual and does not depend on anyone looking in the right direction.

Zones are configurable per truck and per area: a wide warning ring that lights and buzzes, a tight protection ring that triggers intervention. SensorZone describes the same loop as detection, alerting, and intelligence, the third stage, logged proximity events, is quietly the most valuable, because it turns every close call into data for your traffic plan and satisfies the near-miss review discipline the federal rules already expect.

Multi-layered AI and UWB systems

A tag system detects tags, not people, so some providers add a camera layer rather than rely on UWB alone. A forklift-mounted AI camera detects a pedestrian who carries no tag, such as a visitor or a contractor, within its field of view, while UWB keeps ranging to equipped people and trucks where racking blocks the view. Trio Mobil is an example of this layered design: the company describes Trio Safe AI as combining forklift-mounted MOBIL-AI cameras with UWB proximity technology, connecting tagless detection and tag-based ranging in one forklift system, with configurable alerts, zone-based controls and automatic slowdown through compatible integrations. How the camera layer tells a person from an obstacle is covered on our camera pedestrian detection page.

The tag is the deal you are making

Everything in this category depends on people wearing tags. Employees are easy; visitors, drivers, agency staff, and contractors are the discipline. A tag station at every entrance, tags on lanyards or vests, and a hard site rule, no tag, no floor, are part of the system’s real cost. If your site cannot enforce that rule, a camera-based system that detects untagged people is the safer architecture, at the price of line-of-sight limits.

Living with it after month one

The failure mode of tag systems is administrative, not electronic: tags drift out of circulation, batteries die quietly, and six months in, a third of the floor is unprotected while every dashboard shows green. Put three numbers on a monthly review, tags issued vs people on site, low-battery alerts, and proximity events per truck, and assign one named owner. Sites that do this keep the protection they paid for; sites that do not have bought hardware, not safety.

What it costs and when it fits

Per-truck hardware typically lands in the low thousands, tags priced per person, and little fixed infrastructure, which is why this family scales down to a five-truck operation better than facility-wide location systems. It fits sites with controlled access, shared truck-pedestrian aisles, racking that defeats cameras, and multi-shift operations where fatigue erodes attention. In the decade of severe-injury data this site publishes, struck-by and caught-between events dominate the narratives, the exact mechanisms mutual ranging attacks. Check your own exposure with the Risk Scorer, compare the families on the systems index, and when you are ready, the quote form below goes out with your fleet size and this category pre-selected so the responses come back comparable.