This temperature sensor SD 122 with a stem and plastic head with a digital output RS 485 / MODBUS RTU is designed for contact temperature measurement of liquid and gaseous substances. In combination with a central holder, the sensor is suitable for temperature measurement in air conditioning ducts. The combination of a sensor and a thermowell is suitable for direct measurement of the medium in pipelines. The temperature sensor is easy to install thanks to the unique “S-head” design of the SENSIT s.r.o. company.
The sensors consist of a plastic head and a metal case, where the sensing element for temperature measurement (sensor) is placed. In the head, there is a terminal block with a converter located, to which a supply cable for sensor supply and digital output signal according to the sensor type is connected through a cable grommet or a connector.
SD 122, SD 122K – MODBUS/RTU communication protocol, communication via the RS485 bus
The temperature range of sensor use is defi ned in the table of technical parameters for the individual versions of sensors. The sensors meet the ingress protection of IP 65 according to EN 60529, as amended.
The sensors are designed to be operated in a chemically non-aggressive environment, the use must be chosen with regard to the temperature and chemical resistance of the sensor head.
ACCESSORIES
- plastic holder (supplied in the package)
- stainless steel thermowell JS 130
- K 120 metal holder
- CONEC 43-00092 connection plug
- connection cables with a straight RKT connector or a right-angled RKWT connector
- fitting with a collet or with cutting rings – for setting of diff erent immersion lengths of the temperature sensor stem
DECLARATION, CERTIFICATES, CALIBRATION
- Manufacturer provides EU Declaration of Conformity.
- Calibration – The entire production passes through a fi nal metrological inspection, which is carried out by comparing with standards or working measuring instruments. Continuity of the standards and working measuring instruments is ensured within the meaning of Section 5 of Act No. 505/1990 on Metrology. The manufacturer off ers to supply the sensors calibrated in the SENSIT s.r.o. laboratory (according to requirements of the EN ISO/IEC 17025 standard, as amended) or in an accredited laboratory.
- SPECIFICATIONS
- DIMENSIONAL DRAFT
- WIRING DIAGRAM
- DOWNLOAD
| Sensor type (K - with connector) | SD 122 SD 122K |
| Output signal | RS 485 / MODBUS RTU |
| Measuring range *) | -50 to 150 °C |
| Accuracy of the electronics | ± 0.2 °C |
| Type / Accuracy of the sensing element | Pt 1000 / ± (0.3 °C + 0.0005|t|) |
| Supply voltage (U) | 15 to 30 V DC |
| Rated supply voltage (Un) | 24 V DC |
| Consumption / Supply current | maximum: 500 mW typical: 300 mW |
| Working conditions | ambient temperature: -30 to 100 °C relative air humidity: max. 100 % atmospheric pressure: 70 to 107 kPa |
| Ingress protection | IP 65 in accordance with EN 60529, as amended |
| Time response | τ0.5 < 9 s (0.2 m/s-1 in running water) |
| Standard stem lengths | 70, 120, 180, 240 mm |
| Standard stem diameter | 6 ± 0.2 mm |
| Material of the stem | stainless steel DIN 1.4301 |
| Resistance to pressure (impact on the stem with the medium) | PN 25 (without thermowell) / PN 63 (with thermowell) |
| Insulation resistance | > 200 MΩ at 500 V/DC, 25°C ± 3 °C; humidity < 85 % |
| Dimensions of the connection head | 70 × 63 × 34 mm |
| Material of the connection head | POLYAMIDE |
| Connector type in the head (for sensors with a connector) | RSFM4 - M12- Lumberg |
| Recommended wire cross-section (for sensors with a grommet) | 0.14 to 1 mm2 |
| Weight | min. 170 g |
*) By extending the stem length by 60 mm, the Sd 122, SD 122K, SD 124 and SD 124K sensors can be used up to 200 °C.
Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.