Rosemount 3900 General Purpose pH/ORP Sensor

Product Benefits

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 sulphide (PPS), EPDM and silicone

ORP: Platinum

Integral Cable: 32 ft (10m) cable with an 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

Technical Data

  • Extended sensor life and protection against poisoning ions using a double junction reference
  • Enhanced performance and increased life with cracking resistant glass
  • Maximum chemical resistance provided by a rugged polyphenylene sulfide body
  • Operates in sub-zero temperatures down to -10°C (14°F)
  • Built-in solution ground for advanced diagnostics
  • The sensor body features a one-piece construction with both front facing and rear facing process threads
  • ¾” and 1” MNPT process connections to meet a variety of application installation requirements
  • SMART enabled for pH measurements



  • F00d & Beverage
  • Chemical
  • Textile
  • Power
  • Refinery
  • Water & Waste Water

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