2-Wire Temperature Transmitter PTT74-Ex Series

PTT74 HART transmitters

  • PTT74-Ex is a smart 2-wire transmitter for temperature and other universal input measurement applications.
  • Is fully HART-compatible.
  • Provides excellent flexibility, low storage and installation costs. The high reliability ensures a safe system operation and low maintenance costs.
  • Input

    Resistance thermometer (2,3,4 wire circuit)
    Thermocouples B,C,E,J,K,L,N,R,S,T,U

    Thermoresistant (NTC)

    Resistance remote signaling Unit(0…5000 Ohm)
    Voltage, mV (-125…1150 mV)


  • Output
    2-wire technique
    4…20 mA


  • Operating Temperature
    -40°C to 85°C


  • Electrical isolation between input and output(I/O Isolation)


  • Digital low drift processing of measurement values


  • Customer –specific linearization
    32 tie points


  • Continuous sensor self-monitoring
    Parameters saved permanently in EEPROM
    Monitoring of ADC and DAC parameters every 1 sec
    Wire break monitoring acc. With NAMUR NE 89


  • Dual Input functionality
    Absolute, differential, average values


  • Parameterization (Software configuration)
    Smartware Calibration Tools (SCT)
    Siemens PDM Software


Hand held terminal: DHH691, 691HT, STT04, HC275, HC374, HC475 …


  • Approval for explosion protection
    Intrinsically safe               II 2 G EEx ib IIC T6, mount in zone 1
                                                        II 3 G EEx nA II T6, mount in zone 2


2-Wire Temperature Transmitter PTT74-Ex Series

2-Wire Temperature Transmitter PTT74-Ex Series2-Wire Temperature Transmitter PTT74-Ex Series


If you are looking for Temperature Sensors, please refer to Temperature Sensor and Thermowell page.


PTT74-Ex Temperature Transmitter
PTT74-Ex Temperature Transmitter