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Hytera PT790 Ex - TETRA ATEX handheld radio

The leading TETRA handheld radio in the world with the highest level of intrinsic safety.

    Product description

    The PT790 Ex is the first TETRA handheld radio worldwide with the highest intrinsically safe level "ia". Its robust design and its safety functions substantially increase the industrial safety of users in the oil and gas industry, mining industry or fire departments.



    TETRA-Handfunkgerät PT790 Ex - Produktfoto TETRA-Handfunkgerät PT790 Ex - Produktfoto

    Maximum safety

    As the first TETRA handheld radio throughout the world with "ia" approval, the PT790 Ex can be used in areas in which an explosive atmosphere containing a mix of air and combustible gases, vapors or mists are permanently present (Zone 0). In addition, the radio can be used in areas where hazardous materials are only present under certain circumstances/conditions (Zone 1).

    Robust & reliable

    The PT790 Ex offers excellent features even under harsh operating conditions. The device is dust-proof and waterproof in accordance with IP67 degree of protection, withstanding submersion in 1 meter of water for a duration of up to 30 minutes. Furthermore, the PT790 Ex meets the requirements of the US MIL-STD-810 F/G standard.

    Functions for industrial safety

    To offer the maximum possible industrial safety, the PT790 Ex features a man down alarm sensor and an adjustable time alarm (lone worker). The standard equipment GNSS module receives positioning data via GPS, GLONASS and Beidou and can transfer these data for further analysis to the control room or an AVL dispatcher.

    Immediate and direct TETRA communication

    PT790 Ex provides rapid access to the TETRA radio network and to its services. It meets the regulations of the ETSI TETRA standard and is therefore compatible with infrastructures and terminals from various manufacturers.

    Various functions

    Besides voice and data communication, the PT790 Ex offers many additional functions: Encryption, programmable keys, etc. A rugged side connector is provided for connection of a wide range of approved lightweight and heavy duty headsets, helmet sets, etc.

    High-strength LCD protective cover

    The high-strength LCD protective cover is extremely scratch-resistant. As part of the ATEX compliance testing the screen can withstand the impact of a 1 kg ball, dropped on it from a 1 m height.

    Countersunk screws

    To minimize the possibility of a discharge at the belt clip, the screws for fastening the belt clip are countersunk. If the radio should ever be dropped, the screws will not touch the ground.


    • Operating mode

      • Trunked radio mode (TMO): Communication via the TETRA radio network (semi-duplex and duplex mode)
      • Direct mode (DMO): Direct communication between the radios (semi-duplex)

    • Security services

      • Authentication (initiated by TETRA system, made mutual by terminal)
      • Air interface encryption (TEA1, TEA2, TEA3, TEA4)
      • End-to-end encryption (E2EE) by software (AES128 / AES256), by SIM card, encryption of voice and SDS
      • TETRA security class 1, 2, 3, 3G: non-encrypted, static encryption (SCK), dynamic encryption (CCK/DCK), group encryption (GCK)
      • Key distribution via air interface (OTAR)
      • Static encryption in the DMO mode (SCK)
      • Temporary Enable/Disable, Permanent Disable
      • Ambience listening

    • Voice services

      Group calls

      • Group call with defined priority (incl. pre-emptive priority)
      • Dynamic Group Number Assignment (DGNA)
      • Broadcast call (group, TMO)
      • Talking party indication (TPI)
      • Late Entry
      • Open group call
      • Group scan with priorities
      Individual call
      • Individual call, semi-duplex and individual call
      • Duplex (TMO) Individual call with defined priority (also pre-emptive priority)
      • Calling Line Identification Presentation (CLIP)
      Emergency call
      • Emergency call to selected or pre-defined group
      • Emergency call as individual call and as call to a telephone network (PSTN/PABX)
      • Programmable Transmit/Receive cycle (TMO and/or DMO)
      • Silent alarm (TMO)
      Calls to telephone networks (PSTN/PABX) (TMO)
      • PSTN/PABX individual call, full-duplex
      • PSTN/PABX individual call, half-duplex
      • DTMF
      • Calling Line Identification Presentation (CLIP)
      Additional call services
      • Callout
      • Gateway call (DMO) / repeater call (DMO)

    • Security and safety functions for the user

      • Emergency call button
      • Lone worker function / man-down alarm
      • Position alarm
      • Silent alarm
      • Call barring, Call Authorised by Dispatcher
      • Programmable key lock (individual keys can be excluded from the lock)
      • Configuration protection / configuration password
      • TX Inhibit (TXI), with optional status messages

    • Data services and message services

      • Send/receive short data service (SDS) – types 1, 2, 3, 4 and TL
      • Long SDS and Flash SDS
      • Send status message as an SDS message
      • Notification of new messages during a call
      • Packet Data service (packet data, single-slot, multi-slot)
      • Java™ platform MIDP 2.0, WAP

    • Functions of the user interface

      • 20 programmable keys for direct access to the individual
      • Functions (shortcut keys)
      • 4-ways navigation key
      • Separate rotary switches for call groups and audio volume
      • Flexible dialing (e.g. direct dialing, redialing, dialing lists, missed calls etc.)
      • Special microphone
        • Top microphone for semi-duplex calls
        • Bottom microphone for duplex conversations
      • Adjustable screen brightness & screensaver
      • Already many international languages available
      • Installation of several optional languages on radio
      • Positioning according to ETSI LIP or NMEA protocol
      • Completely integrated GPS/GLONASS/Beidou receiver
      • Completely programmable position updating
      • Display of direction and position of the other call parties
      • Transmission of the position data on emergency call
      • PEI interface
      • Clock synchronization via GPS / SAT, TETRA network or local time
      • Energy saving mode
      • Automatic cell re-selection without call interruption (handover)
      • Programming several selectable network identifications (99 TMO, 32 DMO)
      • Programming several selectable PSTN / PABX gateways
      • Customizable alarm tones
      • Radio User Assignment (RUA)
      • Over The Air Programming Interface (OTAP)

    Technical data

    General data

    Frequency ranges

    320 – 380 MHz / 380 – 430 MHz

    405 – 475 MHz / 806 – 870 MHz

    Dimensions (H × B × T)

    141 × 55 × 40.7 mm


    approx. 515 g (with 1800 mAh battery and antenna)

    Operating voltage

    7.4 V

    Battery (lithium-ion battery)

    1800 mAh (standard battery)
    2400 mAh (optional battery)

    Battery service life (5/5/90 duty cycle)

    > 16 hours (1800 mAh)
    > 20 hours (2400 mAh)

    Maximum audio power output

    > 1.2 W

    User interface

    LCD display

    160 x 128 pixels, 65,536 colors, 1.8 inches

    Call group number – TMO


    Call group number – DMO


    Phone book

    2000 entries

    Group folders – TMO (use for scanning, scan lists)

    200 (200 groups per list)

    Group folders – DMO

    50 (200 groups per list)

    Number of short messages (SDS) / (input, output, drafts)

    400 / 50 / 50

    Number of status messages


    Environmental conditions

    Operating temperature range (in non-hazardous environment)

    -30 °C to +60 °C

    Operating temperature range (in hazardous environment)

    -20 °C to +50 °C

    Storage temperature range

    -40 °C to +85 °C

    Relative humidity

    ETS 300 019 Class 7.3E

    Protection against dust and moisture

    IEC60529, IP67

    Shock and vibration resistance

    MIL-STD-810 G

    Explosion protection

    II 1 G Ex ia IIC T3 IP5X Ta -20°C to +55°C
    I M1 Ex ia I IP5x Ta -20°C to +50°C
    II 1 G Ex ia IIC T3 IP5X Ta -20°C to +50°C
    II 2 G Ex ib IIC T4 IP5X Ta -20°C to +50°C
    II 1 D Ex ia IIIC T160°C IP5x Ta -20°C to +50°C
    II 2 D Ex ib IIIC T120°C IP5x Ta -20°C to +50°C

    Radio characteristics

    Channel spacing

    25 kHz

    Transmitting power

    1 W

    Receiver class

    ETSI EN 392-2 / 396-2 class A & B

    Static receiver sensitivity

    -116 dBm (typically -117 dBm)
    -115 dBm (typically -116 dBm) (800 Mhz)

    Dynamic receiver sensitivity

    -106 dBm (typically -108 dBm)
    -105 dBm (typically -106 dBm) (800 Mhz)

    GNSS (GPS / GLONASS / Beidou)


    ≤ -148 dBm receiving sensitivity
    ≤ -167 dBm signal tracking sensitivity


    ≤ 2 m

    TTFF (Time To First Fix) cold start

    < 26 s

    TTFF (Time To First Fix) warm start

    < 1.5 s

    Features marked with * are available in future versions of the product.

    All technical data were tested according to the respective standards. Due to continuing development, technical changes are reserved.

    Scope of delivery

    • Handheld radio PT790 Ex
    • Antenna (GPS integrated)
    • Lithium-ion battery
    • Power adapter (country-specific)
    • Charger
    • Belt clip
    • Hand strap
    • Manual
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