Rosemount Analytical TF396 Specifications

• NO GLASS TO BREAK due to use of Ion-selective field
effect transistor.

• REDUCED DRIFT with TUpH reference technology.

• SUITABLE FOR USE AT COLD TEMPERATURES with
continued rapid response and accuracy.

• REDUCED CALIBRATION FREQUENCY due to
increased sensor stability.

• QUICK CABLE-TO-SENSOR RELEASE provided by
waterproof electrode/cable connector.

• MINIMUM SENSOR MAINTAINANCE due to TupH reference
technology which ensures continued reference performance
when the sensor becomes coated.

• OPTIMUM VERSATILITY by providing various mounting options.

• BUILT-IN CABLE CAP PREAMPLIFIER allows use with most
pH instruments.

• AVAILABLE WITH 316SS TRI-CLOVER

®

FITTING.

Product Data Sheet

PDS 71-TF396/rev.I
June 2012

Model TF396

Model TF396 with Mating Cable

Model TF396

with Tri-Clover®Fitting

NON-GLASS pH SENSOR FOR
SUBMERSION/INSERTION

FEATURES AND APPLICATIONS

The ion-selective field effect transistor (ISFET) pH electrode
provides a stable pH measurement. Its rate of response can
be ten times faster than glass electrodes, enabling better
process control. Its short response time and increased sta­bility at low temperatures make it suitable for use in cold
processes like brine or water for cooling. Aging effects
caused by temperature fluctuations or large changes of
process pH are greatly reduced, providing longer intervals
between calibration and maintenance of the sensor.

Because there is no glass bulb, it can be used in many
applications that restrict or prohibit pH glass electrodes due
to the risk of broken glass getting into the process. It may
also provide longer sensor life in processes that will break or
crack pH glass bulbs. By allowing direct installation into the
process, costs for laboratory analysis of sample lines are
greatly reduced.

The TUpH Reference technology includes a large area ref­erence junction for minimum maintenance requirements.
The reference junction provides an electrical connection
between the reference electrode and the sample, and helps
maintain a stable reference potential, regardless of the
change in sample pH. The TUpH reference electrode junc­tion (the entire plastic tip surrounding the ISFET electrode)
maintains a steady reference signal, even in dirty applica­tions, by resisting plugging (a common cause of pH signal
drift). This large reference junction area (400 times greater
than typical teflon or ceramic junctions) is made of micron­sized reference pathways allowing for ionic exchange but
preventing plugging by larger particles and will continue to
send a steady pH signal, even in the dirtiest of applications.
The field-proven TUpH reference junction technology results
in greatly reduced maintenance requirements.

continued on page 2

®

Tri-Clover is a registered mark of Alfa Laval Corporate AB

2 Rosemount Analytical

FEATURES AND APPLICATIONS (continued)

The TUpH helical reference pathway resists reference poisoning.
Ions diffuse through the reference pathways and a charge is
passed to the reference element. The reference element must
be protected from contamination by poisoning ions such as
sulfide, mercury, cyanide, and ammonia that will cause reference
drift and offsets. The TUpH sensor's long internal reference
pathway hinders the contaminants' migration to the reference
element thereby providing an increased sensor life.

All TUpH sensor models have been specifically designed for
improved performance in harsh, dirty, or abrasive applications
where large quantities of suspended solids are present.

The Model TF396 offers a watertight sensor-to-cable connector
that prevents cable twisting and eliminates the need for rewiring
when replacing the sensor. The sensor cable includes an inte­gral preamplifier cap with mating connector and is compatible
with most Rosemount Analytical analyzers and transmitters.

SPECIFICATIONS

Measurement Range: 2-12 pH

Measuring element: ISFET

Repeatability: ±0.05 pH

Response time to pH change: 99% in 30 seconds step change

Wetted Materials: Code -01: Polypropylene, EPDM, Ryton, Silicon.

Code -02: 316SST, Titanium, Polypropylene, EPDM, Ryton, Silicon

Process Connections: Code -01: 1 in. MNPT front and rear facing threads

Code -02: 2 in. Tri-Clamp connection

Temperature Range: 0 to 100°C (32 to 212°F) @ 50 psig

Pressure Range: -10 to 100 psig (32 to 790 kPa [abs]) at 50°C

Minimum Process Conductivity: 100 µS/cm

Cable Lengths: 20 ft, 50 ft (6 m, 18 m)

Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)

MODEL TF396-01 DIMENSIONS

CONNECTION. PREAMP
CAP ADAPTOR WITH
CABLE
PN 23991 -02 -01