funktel FT4 S Ex

Intrinsically safe TETRA Security handset—unique, extra safe

The high-end FT4 S Ex handset is certified according to the most stringent ATEX and IECEx directives and is also equipped with an integrated GPS module. The funktel FT4 S Ex provides the same comprehensive alarm sensors as the FT4 S, but with the additional features that all personal alarms can be used in highly sensitive and potentially explosive areas as well.

Thanks to the unique mining certification and IP65 class protection, the funktel FT4 S Ex handsets also resist the harshest conditions. The funktel FT4 S Ex is the first TETRA radio that covers all known application scenarios and is suitable for use in hazardous and solitary working environments, such as the chemical industry, in oil or gas companies or in mining industry.

Gas: II 2G Ex ib IIC T4 Gb
Dust: II 2D Ex ib IIIC T125°C IP6X Db
Hazardous Mining: I M2 Ex ib I Mb


  • TETRA radio set according to ETSI standard
  • Intrinsically safe according to highest ATEX & IECEx standards
  • Extremely robust with enhanced impact resistance according to mining standard
  • High resolution 2,2’’ TFT colour display
  • IP65-class protection suitable for outdoor use (dust-tight and water jets protected)
  • Illuminated, clearly demarcated keys for easy use - even with gloves
  • Two microphones
  • Large red emergency button
  • Emergency call in TMO and DMO mode
  • Vibration alarm
  • Individually assignable function keys
  •  Integrated GPS receiver
  •  Various memory card slots
    • MicroSD card for storage of user-specific settings and parameters
    • SIM card for E2E encryption


Desk Station

Leather Case

Desktop Charger




  • Radio standard: TETRA (Trans European Trunked Radio)
  • Dimensions: 145 x 60 x 36 mm (without antenna)
  • Weight: 384 g incl. battery FT4 Ex 1700 mAh
  • Protection class: water, dust and shock protected - IP65
    • water-jet and dust proof acc. IEC 60529
  • Ring tone volume: max. 96 dB (A) at 30 cm distance
  • Frequency range: 380-430 MHz or 410-470 MHz, others upon request
  • Channel Spacing: 25 kHz
  • Duplex Spacing: 10 MHz (at 380-470 MHz)
  • RF Transmission power: 1 W, performance class 4
  • Emission class: 25K0/W7D/W
  • Receiver class: A&B
  • Transmission power regulation: 3 stepsof 5 dB

Explosion Protection

  • ATEX (Mining / Gas / Dust)
    • BVS 11 ATEX E 083 X: I M2 Ex ib I Mb / II 2 G Ex ib IIC T4 Gb / II 2D Ex ib IIIC T125°C IP6x Db
  • IECEx (Mining / Gas / Dust)
    • IECEx BVS 11.0099X: Ex ib I Mb / Ex ib IIC T4 Gb / Ex ib IIIC T125°C IP6x
  • Operating time: up to 14 h (5/5/90, without GPS), up to 18 h
  • Battery: Ex battery lithium ion, 3.7 V, 1700 mAh, incl. vibration

Fully integrated sGPS Receiver

  • Sensitivity: 182 dBw (-152 dBm) / 185 dBw (-155 dBm) (Acquisition / Tracking)
  • Accuracy: 5 meter (50% probability), 10 meter (95% probability)
  • Protocol ETSI Location Standard Reporting (LIP)