The Rosemount 3900 pH Sensor / ORP Sensor features a double junction reference that aids in the sensors' resistance to harsh environments and helps prolong sensor life. The double junction protects the reference element from poisoning ions-such as ammonia, chlorine, cyanides, and sulfides. Both sensors are made with a porous Teflon® junction. The robust ph/ORP sensor design provides reliability in a wide range of aqueous solutions found in pipelines, open tanks or ponds.
Operating Temperature: –10° to 100°C (14° to 212°F)
Max. Operating Pressure: Maximum Pressure: 790 kPa [abs] (100 psig) at 100°C (212°F)
Materials of Construction: Stainless steel, glass, Teflon®, polyphenylene sulfide (PPS), EPDM and silicone (If selecting the ORP sensor, an additional wetted material is Platinum.)
Process Connection: Front facing: 3⁄4" and 1" MNPT; Rear facing: 1" MNPT
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