The Intrinsically Safe Lone Worker Alarm for Ex Areas



  • Mobile network options
  • GNSS options (satellite positioning)
  • ManDown options
  • SRD3 + NFC compatibility options
  • Mains charger adapter type
  • Package options

This combination does not exist.

Mobile network options: 2G/3G + 4G Data
GNSS options (satellite positioning): with GNSS
ManDown options: with ManDown

          TWIG One Ex

          TWIG One Ex is an intrinsically safe personal alarm device optimized for lone worker protection in potentially explosive environments.

          It is equipped with the essential lone worker protection functions, a powerful loudspeaker, programmable device keys and a configurable user interface. The device functionalities can be extended with compatible TWIG Point cloud services and TWIG short range devices.

          ATEX approved
           II 2 G Ex ib IIC T4 Gb
           II 2 D Ex ib IIIC T130°C Db
          Ta: -20°C...+60°C 

          EESF 20 ATEX 045X / IECEx EESF 19.0020X

          • Alert triggers include alarm button, automatic ManDown function, Amber alert and optional TWIG Remote Button of SRD category 2. Predefined emergency protocol transmits last known user position and opens two-way voice connection to alarms receiving centre (ARC).

          • High-performance GNSS receiver with turn-key AGNSS feed is complemented with TWIG Beacon SRD, Bluetooth Low Energy and Wi-Fi indoor locating beacons.

          • Excellent operating times even in continuous GNSS satellite monitoring are achieved through advanced technology and large-capacity battery.

          • Fully remotely configurable, the intrinsically safe TWIG One Ex lone worker alarm is fast to deploy and flexible to operate. Also USB programmable, either manually or using saved file.

          • TWIG Integrator Kit resources enable integrating TWIG devices with alarm receiving centre. Optionally the TWIG Point services provide a turn-key solution for testing or deployment. Or receive alarms and reports on your smartphone as SMS with web link, opening up Google Maps view.

          • The TWIG One Ex including a short range devices (SRD) transceiver can receive alarms from several TWIG Remote Button short range devices and determine its position from nearby TWIG Beacon locating devices also when GNSS signal is not available. Note! Compatible with NFC tags but not with TWIG SRD tags!

          Features and Benefits

          Configurable UI and keypad 
          Attendance Monitoring
          Indoor Positioning

          The preprogrammable device keypad and soft key functions extend device usability.

          TWIG One Ex equipped with NFC device option registers attendance by reading NFC tags.

          Indoor location with SRD3 device option and TWIG SRD,  Bluetooth Low Energy or Wi-Fi beacons.

          ATEX Approved
          Power for Communication
          ManDown Alarm
          Power for Noisy Environments

          Approved for gas (II 2 G Ex ib IIc T4 GB) and for dust (II 2 D Ex ib IIIC TT130°C Db)

          On-screen messages with alert tone and vibration, preprogrammed one-touch status messages and voice calls.

          ManDown alarm function triggers alert automatically by detection of device orientation, non-movement, impact or free fall.

          Lone Worker Protection Usage Areas