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SD 122 SERIES SENSORS – INTELLIGENT TEMPERATURE SENSORS WITH A STEM AND PLASTIC CONNECTION HEAD

Description and application

SD 122 SERIES SENSORS – INTELLIGENT TEMPERATURE SENSORS WITH A STEM AND PLASTIC CONNECTION HEAD

Temperature sensor  SD 122 is intelligent microprocessor-controlled temperature sensor. The temperature sensor is intended for contact temperature measurements of liquid or gaseous substances. The sensor-central holder combination is suitable for temperature measurements in air condition ducts. The sensor-thermowell combination is suitable for temperature measurements in tubing. The standard temperature range in which the sensors are allowed to be utilised is -40 to 150 °C. The sensor communicate by means of RS 485 bus and only the bus can control the sensor. Communication inputs are protected to overvoltage. In case the module is placed as terminal on the line, a terminating resistor can be attached to the wiring by shorting the contacts (the switch SW placed next to terminals for communication lines connection). All setting is stored in EEPROM memory. The electronic module is equipped with the WATCHDOG circuit, which safeguards proper program functioning in the microprocessor. Easy mounting of the temperature sensor is ensured by the unique “S head” design invented by SENSIT s.r.o.

The sensors are designed to be operated in a chemically non-aggressive environment. The sensor is made in variant:

  • SD 122 – the command structure corresponds with the ModBus RTU communication protocol.

ACCESSORIES

DECLARATION, CERTIFICATION, CALIBRATION

  • Manufacturer provides EU Declaration of Conformity.
  • Calibration – The final metrological inspection – comparison with standards or working instruments – is carried out for all the products. Continuity of the standards and working measuring instruments is ensured within the meaning of the Section 5 of Act no.505/1990 on metrology. The manufacturer offers a possibility to supply the sensors calibrated in SENSIT s.r.o.’s laboratory (according to requirements of the EN ISO/IEC 17025 standard) or in an Accredited laboratory.  

 


  • Specifications
  • Wiring diagram
  • Dimensional draft
  • Přiložené soubory

Sensor type SD 122
Power supply 10 to 35 V DC(unstabilized) 14 to 24 V AC
Power consumption max. 1000 mW
Measuring range -40 to 150 °C
Standard stem length 70, 120, 180, 240 mm
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
protocol ModBus RTU 1 stop bit, without parity
Accuracy of electronics 0.05 %
Accuracy of sensing element ± 0.5 °C
Resolution 0.01 °C
Ingress protection IP 65 in accordance with EN 60529
Material of the sensor stem stainless steel DIN 1.4301
Material of the connection head POLYAMIDE
Working conditions ambient temperature: -30 to 70 °C
relative humidity: max. 85% (at the ambient temperature 25 °C)
atmoshperic pressure: 70 to 107 kPa
Weight 0.2 kg

Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

SD 12x SERIES SENSORS – INTELLIGENT TEMPERATURE
SD 12x SERIES SENSORS – INTELLIGENT TEMPERATURESD 12x SERIES SENSORS – INTELLIGENT TEMPERATURE
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