The SGW family combines a thermocouple or resistance temperature probe with a transmitter installed in the connection head. It converts the sensing signal into a temperature-linear two-wire 4-20mADC output. The thermocouple transmitter includes cold-junction compensation. Small or large stainless steel heads and aluminum heads are available, along with local pointer or digital display options.
| Sensor category | Element options | Construction | Sheath diameters | Basic transmitter accuracy |
|---|---|---|---|---|
| Thermocouple | K, N, E, J, T, S, R or B | Single or dual sheathed elements | 3mm, 4mm, 5mm, 6mm or 8mm | 0.75%FS |
| RTD | Pt100, Cu50 or Cu100 | 0.25%FS |
| Parameter | Specification |
|---|---|
| Output | 4-20mADC, linear with measured temperature; two-wire transmission |
| Supply | 12-40V; nominal 24VDC; reverse-polarity protection |
| Maximum load resistance | Rmax=(Vs-7.5V)/0.022A, where Vs is the supply voltage |
| Transmitter vibration resistance | 4g over 2-150Hz |
| Open-sensor lower alarm | Output below 3.5mADC for two-wire RTD and thermocouple transmitter modules |
| Open-sensor upper alarm | User set; 20.5mADC is an example setting |
| Ingress protection | IP65 |
| Flameproof marking options | Ex d IIB T4-T5 or Ex d IIC T1-T6 |
| GT ambient option | -20-70°C |
| LT ambient option | -40-80°C |
| Relative humidity | 0-100%, non-condensing |
Connection structures can be selected for thermal mounting sleeves, while reinforced sleeve versions can mount directly to the equipment. Two-wire current transmission uses ordinary copper wiring. Match the output to the current input of a display, recorder, controller, PLC or computer control system. An LB830S barrier pairing is also listed as an available system option.
