FEATURES AND APPLICATIONS
- EXTENDED SENSOR LIFE provided by double junction reference.
- ENHANCED PERFORMANCE AND INCREASED LIFE with minimized glass cracking
provided by field-proven ACCUGLASS™ pH glass formulations.
- VP8 QUICK CABLE-TO-SENSOR RELEASE, provided by the watertight VP8 multiple-pin
connector, eliminates cable twisting.
- MAXIMUM CHEMICAL RESISTANCE provided by rugged polyphenylene sulfide body,
completely sealed to eliminate sensor leakage.
- NEW 3/4'' AND 1'' MOUNTING SOLUTIONS to meet a variety of application
- OPTIMUM VERSATILITY WITH VARIOUS MOUNTING
OPTIONS provided by one-piece construction with process
threads in two places.
- OPERATES IN SUB-ZERO TEMPERATURES
down to -10°C (14°F).
General purpose pH/ORP sensor model
3900/3900VP. The double junction reference aids in the
sensor’s resistance to harsh environments and helps
prolong sensor life. Models 3900 and 3900VP are provided
with a double junction reference, which protects the
reference element from poisoning ions – such as ammonia,
chlorine, cyanides, and sulfides – in the process. Both
models are made with porous Teflon® junction positioned
near the pH/ORP-sensitive membrane.
The AccuGLASS pH glass formulations exceed industry standards.
The AccuGlass pH glass is a result of many years of
glass research resulting in a formulation which has been
found to increase the life of the sensor. Unlike other pH
glasses presently on the market, this glass resists cracking
especially at higher temperatures and reduces sodium ion
error commonly found in high pH applications. Overall, the
AccuGlass formulation enhances the sensor performance to
measure pH more accurately and have a longer sensor life
than ever before
Model 3900VP is offered with a watertight sensor-to-cable
connector which eliminates re-wiring and cable twisting
when replacing sensors. The Variopol VP multiple pin
connector is an integral part of each sensor model and
uses a mating VP cable. Once the cable is installed and
wired to the analyzer, sensors are easily replaced without
replacing the cable and without rewiring the analyzer. Also
the cable can be disconnected from the sensor before
removal from the process which eliminates cable twisting.
Models 3900 and 3900VP are housed in a molded PPS
body, making each sensor virtually indestructible and
chemically resistant. Complete encapsulation eliminates
leakage or high humidity problems traditionally found in
other pH/ORP designs. The simplified construction,
designed with user convenience in mind does not require
electrolyte (KCl) replenishment or any high maintenance
Installation is easily achieved through the wide variety of
mounting configurations. Both Models feature 1'' and 3⁄4''
inch (MNPT) front facing connections for insertion,
submersion, or flow-through pH and ORP applications.
Both models are combination sensors (pH, reference, and
temperature within sensor body) and measure pH or ORP
(Oxidation/Reduction Potential) of aqueous solutions in
pipelines, open tanks, or ponds. Models 3900 and
3900VP are suitable for virtually all applications and are
compatible with Rosemount Analytical and other