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3900/3900VP General-Purpose pH/ORP Sensor

Brand: Rosemount
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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.
Features
  • 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” Male NPT process connections to meet a variety of application installation requirements
  • Variopol (VP8) cable connection option, for quick cable-to-sensor release, eliminates cable twisting
  • SMART enabled for pH measurements
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.
Features
  • 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” Male NPT process connections to meet a variety of application installation requirements
  • Variopol (VP8) cable connection option, for quick cable-to-sensor release, eliminates cable twisting
  • SMART enabled for pH measurements
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Specifications

Brand

Approvals & Certifications

  • ATEX
  • CSA
  • FM
  • IECEx

Enclosure, Body Material

  • Ryton - Polyphenylene Sulfide (PPS)

Materials of Construction

  • Junction: PTFE (Teflon)
  • ORP Electrode: Platinum
  • pH & ORP Electrode: Glass
  • Solution Ground: Stainless Steel

Maximum System Pressure

  • psia: 114.6 (kPa: 790, bar: 1.15) at 100° C (212° F)
  • psig: 100 (kPa: 689, bar: 6.89) at 100° C (212° F)

Measuring Range

  • 0 to 14 pH
  • ORP: -1,500 to 1,500 mV

NPT Connection

  • 1” NPT Male
  • 3/4” NPT Male

O-Ring Material

  • EPDM

Operating Temperature

  • -10° to 100° C (14° to 212° F)

Pressure Rating

  • CRN Rating - psig: 60 (kPa: 441, bar: 4.41) up to 100° C (212° F)
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