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The Rosemount 3900 pH/ORP combination sensor’s double junction reference aids in the sensor’s 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 sensor design makes the 3900 reliable in a wide range of aqueous solutions found in pipelines, open tanks or ponds .
| Preamplifier Option | Preamplifier, No preamplifier |
| Measuring Electrode | General Purpose Low Resistivity (GPLR) pH glass, Platinum ORP |
| Measurement Range | pH: 0 to 14 ORP: -1500 to +1500 mV |
| Operating Temperature | –10° to 100°C (14° to 212°F) |
| Pressure Port/Fitting 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 ORP: Platinum Integral Cable: 32 ft (10m) cable with integral SMART preamp; 15 ft (4.7m) cable without preamp sensor VP8 Cable: use 24281-XX, 2.5 ft (.8m) to 100 ft (31m) |
| Process Connection | Front facing: 3⁄4″ and 1″ MNPT; Rear facing: 1″ MNPT |
| Product Certifications | IECEx, ATEX, FM, CSA |
Rosemount™ 3900 General Purpose pH/ORP Sensors