Siemens 6AG1331-7RD00-2AB0 SIPLUS S7-300 SM 331 4AI -25...+60 °C -25...+70 °C (only 4-wire) with conformal coating (Siemens 6AG13317RD002AB0)
Siemens 6AG1331-7SF00-4AB0 SIPLUS S7-300 SM 331-20-pole medial exposure with conformal coating (Siemens 6AG13317SF004AB0)