MODELL 490513044 490513044 OUTPUT: 4-20 MA OPERATING VOLTAGE: 12VDC OPERATING TEMPERATURE AT LEAST: 0 ° C TO +50 ° C PH 0-14 (THE TEMPERATURE OF THE BATH IS UP TO 70 ° C), AND THE CONDUCTIVITY CAN BE MEASURED IN ?S /; P/N:311A5178P011 RVDT SX27RV120 RVDT SX27RV120SI RVDT SX27RV120SI 690100383 "RVDT SX27RV120SI OLD P / N : 690100383 RVDT SX36RV120SI RVDT SX36RV120SI 690100644 RVDT SX36RV120SI. S 175 CD S 200 C-20 FT S 200C S 500C