Lone Worker Alarms

The Mercari lone worker device is a dedicated safety alarm that sends an emergency alert fast when help is needed. The worker wears the device on-site and, in an incident, presses the SOS button to trigger alerts to nominated contacts (such as a supervisor or control room). The alert will include GPS location so responders can find the worker quickly. The Mercari LWD can also provide two-way voice communication and safety functions like man-down / no-motion or fall detection, which can trigger an automatic alert if the worker is incapacitated. Because it’s a standalone device (not a phone app), it’s designed to be simple to use under stress and reliable in real work conditions.

You program the Mercari Lone Worker Device by setting coded text messages from your own phone  to the Lone worker alarm. Users decide key safety details —mainly who to contact and how alerts are triggered. Typically, programming includes adding your nominated phone numbers (e.g., supervisor, manager, after-hours contact), confirming the alert sequence (SMS/call) and enabling features such as man-down/no-motion or fall detection. Once saved, the device is ready to use: Pressing SOS sends an emergency alert and will include GPS location to help responders act fast. If you purchase a package with SIM/setup included, we can pre-program it so it arrives ready to deploy—otherwise you can follow the step-by-step setup guide provided with the device.

No — there are no ongoing monitoring fees required to use Mercari lone worker alarms. You buy the device outright and it sends emergency alerts directly to your nominated contacts (for example, a supervisor or manager), so you’re not locked into monthly monitoring contracts.

The only ongoing cost is a SIM/mobile plan for connectivity (depending on your setup and coverage needs). This gives you predictable total cost of ownership while still providing fast SOS alerts and location sharing when help is needed.

Mercari lone worker alarms deliver clear benefits for both employers and workers by improving safety, response speed, and confidence in the field.

Benefits for employers: Lone worker alarms strengthen your lone worker procedures by providing a practical control for high-risk or remote work. They help reduce incident impact through faster escalation, improve visibility with location-enabled alerts, and support consistent safety processes across teams—without locking you into mandatory monitoring contracts. This can lower operational risk and improve duty-of-care outcomes.

Benefits for workers: A dedicated lone worker alarm gives immediate access to help with a one-press SOS, plus features like man-down/no-motion or fall detection for situations where the worker can’t call for help. It’s simple to use under stress, doesn’t rely on a smartphone app, and increases confidence for people working alone.

With Mercari lone worker alarms, alerts go to the nominated contacts you choose—typically a supervisor, manager, control room, or after-hours responder. When an SOS is triggered (or an automatic event like man-down/no-motion or fall detection, if enabled), contacts receive an emergency notification that can include an SMS and/or phone call plus a GPS location link (e.g., a Google Maps link) so they can quickly identify who needs help and where they are. This direct-to-your-team alerting means you stay in control of your escalation process and can respond immediately.

Yes. Mercari lone worker alarms are dedicated safety devices, so they can work without a smartphone. The worker carries or wears the device and can trigger an emergency alert with a one-press SOS button (and, if enabled, automatic alerts like man-down/no-motion or fall detection). Alerts are sent directly to your nominated contacts, often with GPS location to speed up response. Because it doesn’t rely on a phone app, it avoids common issues like app crashes, notification settings, or a flat phone battery—making it a more dependable option for lone worker safety.

You can program Mercari lone worker alarms with up to 10 nominated contacts, depending on your configuration. This lets you set a clear escalation list—such as a supervisor, site manager, after-hours responder, or control room—so alerts reach the right people quickly. When the SOS button is pressed (or an automatic event triggers), the device follows the contact sequence you’ve set and can include key details like the emergency notification and GPS location link to help responders act fast.

Charging typically takes around 3 hours to reach full charge, and battery life is approximately 48–72 hours (depending on usage, signal coverage, and enabled features).

Without a base station: this option is often best for mobile workers who move between sites, vehicles, and client locations. It’s easy to charge via standard power/USB as needed, making it flexible for technicians, carers, inspectors, contractors, and anyone who isn’t returning to the same depot each day.

With a base station: ideal for depots, offices, and shared devices, because it provides a consistent “home” charging point. The device can be docked between shifts so it’s always topped up and ready, reducing the risk of flat batteries and improving daily compliance with lone worker procedures.

The Mercari Lone Worker Alarm is a hardware purchase, so you pay a one-time, upfront price and there are no mandatory ongoing monitoring fees. Cost depends on the option you choose—such as the device on its own, a package that includes a base station, or a bundle with SIM/setup included for faster deployment. Many customers choose the bundle that best matches how their team works (mobile workers vs depot-based teams sharing devices). The only optional ongoing cost is a SIM/mobile plan for cellular connectivity. For current pricing and package details, see the Buy Now options on our website.