AT 3051 Liquid Level Transmitter,Double Flange sensors differential pressure AT 3051 Liquid Level Transmitter,Double Flange sensorsdifferential ... standard flanges of all sizes;Contactor membrane material: 316L, Hastelloy C-276, Tantalum, Monel (based on diagram of contactor), filling ... ;Ambience: relative humidity, 0 ~ 100%; temperature: -35°C ~ 138°CApplied to acid-base salt corrosive liquid vapor