RS485 Modbus temperature probe - plastic connection head

RS485 Modbus temperature probe - plastic connection head

2 to 3 weeks
All of this temperature sensors with stainless steel tube and plastic head with digital output RS 485 / MODBUS - SD 102 are designed for measuring the temperature of gaseous substances and liquids. In combination with the central support, the sensor is suitable for measuring the temperature in air conditioning ducts. The sensor / well combination is suitable for direct measurement in the pipeline. VShe temperature sensor is easy to mount thanks to the unique "S head" design.

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This sensor comprises a plastic head and stainless steel tube in which is placed a temperature sensor. In the head is a terminal block or a converter with a terminal block, to which the power cable intended to supply the sensor and to the digital output signal are connected via a cable gland and a connector. 

SD 122,  communication protocol SD 122K MODBUS / RTU, RS485 communication

The temperature range of the sensors is defined in the table of technical parameters for each variant. The sensors comply with the protection class IP 65 in accordance with the modified standard EN 60529. 

The sensors are designed to operate in a chemically non-aggressive environment, the method of use must be chosen according to the temperature and the chemical resistance of the sensor head.

The sensor is manufactured in a variant:Modbus RS485 temperature probe

  • SD 122 - the control structure corresponds to the ModBus RTU communication protocol.


  • central plastic support
  • stainless steel etablowmowell JS 130
  • central metal support
  • screw with collar or cutting rings - if different immersion lengths of the temperature sensor are set


  • The manufacturer provides an EU declaration of conformity.
  • Calibration - The final metrological control - comparison with standards or working instruments - is carried out for all products. The continuity of standards and work measurement instruments is ensured within the meaning of article 5 of Law No. 505/1990 on metrology. The manufacturer offers the possibility of supplying the calibrated sensors.
  • Features
  • Cable schematics
  • Dimensional draft
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Sensor type SD 122
Power source 10 to 35 V DC (not stabilized) 12 to 24 V AC
Energy consumption max. 1000 mW
Measuring range -50 to 150 ° C
Communication properties communication via RS 485 maximum segment length is 1200 m, asynchronous transfer
preset transfer speed 9600 Bd optional transfer speeds 1200, 2400, 4800, 9600, 19200, 57600, 115200 Bd - DIP switch
247 modules / 1 serial port
ModBus RTU protocol 1 stop bit, no parity
Electronics accuracy *) ± 0.2 ° C
Type / precision of the sensitive element *) Pt 1000 / ± (0.3 + 0.005 | t |)
Resolution 0.01 ° C
Ingress protection IP 65 according to EN 60529
Standard rod length 70, 120, 180, 240 mm
Sensor rod material DIN 1.4301 stainless steel
Connection head material POLYAMIDE
Working conditions ambient temperature: -30 to 70 ° C
relative humidity: max. 85% (at room temperature 25 ° C)
atmospheric pressure: 70 to 107 kPa
Weight 0.2 kg


Product Type
Protection sign
Maximum operating temperature
6 mm
tube length
70 mm
120 mm
180 mm
240 mm
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