Overview
Work at height is rarely done with one piece of kit. A lineman may carry a pole strap and a secondary lanyard; a rigger may use a double hook and a fall arrester on the same task. Each device has its own failure mode, and a monitoring system that only understands a standard lanyard will miss most of them.
The SBM3000 was built for that reality. A single control unit manages any combination of five attachment devices and distinguishes more than ten unsafe states — not worn, low anchorage, unclosed hook, entanglement close to the body, leaning on scaffolding, suspended without protection. Recognition is performed on the device by a multi-axis posture sensor with edge computing, which is why it keeps working where the network does not.
Two details stand out in daily use. An optional 110 dB external speaker announces the violation on site, which makes the correction social rather than silent. And with the barometric height calibrator, the unit detects when the wearer passes 2 m and enters monitoring mode automatically — no manual reporting, no missed registrations.
Key features
Five devices, one controller
Any combination of pole strap, secondary lanyard, self-locking device, fall arrester and double hook is supported by a single control unit, so crews are not issued different monitors per tool.
Detailed violation logic
Single and double lanyard high, level and low anchorage; suspended without protection; pole strap supported or unsupported; fall arrester and self-locking device engaged or not engaged. The detection rate is well beyond what visual spot-checking achieves.
Violation alerting
Real-time alarms for a harness that is not worn, low anchorage, loss of protection at height and a hook that is not connected.
Multi-channel notification
Buzzer at the worker; SMS, voice call, WeChat and in-app notification for supervisors, so escalation does not depend on someone being at a desk.
Multi-mode operation
Monitoring and non-monitoring modes can be switched, which keeps the device credible on tasks where harness monitoring is genuinely not applicable.
Automatic height detection
With the barometric calibrator, the unit recognises when the wearer exceeds the configured height (2 m by default) and enters monitoring mode by itself — removing the reporting step that people forget.
Technical specification
| Model | SBM3000 series |
|---|---|
| Communication | 4G, Bluetooth 5.4 |
| Monitoring frequency | 1–5 s (configurable) |
| Positioning | GPS / BeiDou dual mode, ±10 m (public network version) |
| Battery | 3.7 V, 3,000 mAh |
| Runtime | 18 h with double hook |
| Alarm sound level | 75 dB at 1 m (110 dB optional external speaker) |
| Operating modes | Standalone or networked |
| Harness standard | Harness compliant with GB 6095-2021 |
| Explosion protection | Ex ib IIC T4 Gb |
| Ingress protection | IP65 |
Where it is used
| Power generation | Transmission tower erection and maintenance, substation gantry work, distribution platform work, insulator replacement, conductor stringing and live-line work Fall from height, low anchorage, transfer between anchor points |
|---|---|
| Construction | Scaffold erection and dismantling, formwork, rebar tying, steel structure erection, façade insulation, curtain wall, roof waterproofing, deep excavation edges Fall from height, unprotected edges, rapid task switching |
| Oil and chemical | Derrick work, tank roof gauging, column and absorber internals, furnace roof inspection, reactor catalyst handling, tanker loading Fall from height, mixed attachment devices, hot work at height |
| Rail and transit | Overhead line maintenance, cantilever adjustment, dropper replacement, insulator cleaning, switchgear maintenance, surge arrester replacement Fall from height in short possessions, pressure to complete quickly |
| Communications | Line installation, base station construction and maintenance, tower and mast inspection Fall from height on lattice towers |
| General industry | Crane and gantry maintenance, large machine tool servicing, heavy equipment installation, pipework, electrical and ventilation maintenance, factory steelwork Fall from height, improvised access |
| Municipal works | Street lighting maintenance, bridge inspection, overhead pipe laying, crossing frame erection Fall from height, public exposure, mixed access equipment |
Patents and certifications
Frequently asked questions
Which attachment devices are recognised?
Pole strap, secondary lanyard, self-locking device, fall arrester and double hook — five devices in any combination on a single control unit.
How does automatic height detection work?
A barometric calibrator detects the change in air pressure as the wearer climbs. Once the configured height — 2 m by default — is passed, the unit enters monitoring mode without the worker registering anything. This removes missed registrations entirely rather than reducing them.
Is there an on-site alarm for bystanders, or only for the wearer?
Both are available. The wearer receives a buzzer alarm at 75 dB. An optional external speaker raises the on-site announcement to 110 dB, which is loud enough to be heard on an active construction site and to make the correction visible to the crew rather than private to the individual.
Can the same unit be used across different crews and harness types?
Yes. Because one unit handles five attachment devices and switches between monitoring and non-monitoring modes, a single model can be issued across crews that use different tooling, which simplifies procurement and spares.
What standards does the harness meet?
The supplied harness complies with GB 6095-2021. Where a project specifies ANSI Z359 or EN 361, tell us before ordering and we will confirm the applicable documentation.