Rosemount™ 3900 General Purpose pH/ORP Sensors

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