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allows the process to flow by the glass electrode for accurate and reliable pH measurement. Both
pH glass bulbs — the standard hemi or optional flat pH glass — are exceptional for increased resist-
ance to high temperature and other effects of aging for longer life.
The TUpH reference junction and helical pathway combined with the AccuGLASS pH glass
performs exceptionally well in dirty, high solid applications and requires only minimum mainte-
nance. This is the toughest pH sensor on the market and is still unmatched by all other pH
sensors. The constant increase in demand for the TUpH sensor proves it's success as the best
process industry pH sensor.
All TUpH sensor models have been specifically designed for improved life in harsh, dirty, and abra-
sive applications such as lime slurry, waste treatment, paper machine headbox, and pigment/dye
applications, where large quantities of suspended solids are present. Various sensor materials,
depending on the sensor model, are available for a variety of different application needs.
SMART is the standard option. A preamplifier converts the high impedance pH signal into a
stable, noise-free signal and must be used with all pH sensors. An integral SMART preamplifier
stores calibration information and can be built into the sensor when ordering the SMART pream-
plifier option. Otherwise, a standard preamplifier can be used in a junction box or built into the
analyzer/transmitter. All integral preamplified SMART TupH Sensors are compatible with all Rose-
mount Analytical instruments.
The 396VP, 396PVP, and 396RVP are offered with a watertight VP sensor-to-cable connector
which eliminates rewiring and cable twisting when replacing sensors. The VP (Variopol) 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,
without rewiring the analyzer (if the replacement sensor is the same as its predecessor). Also the
sensor can be disconnected from the cable before removal from the process which eliminates
cable twisting. VP8 cable assemblies work with all VP sensors. VP8 wiring is standard across all
pH sensor families. VP8 is required when used with SMART preamplified sensors.
2 Description and Specifications
FIGURE 1-1. Cross Section Diagram of the TUpH Reference Technology. All TUpH sensors are designed with a
large area reference junction, helical reference pathway, and an AccuGlass pH glass bulb. This sensor technology
e
nsures superior performance while only requiring minimal maintenance.
Section 1: Description and Specifications 396P + 396PVP Sensors Instruction Manual
August 2013 LIQ_MAN_396P_396PVP