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Instruction Sheet
PN 51A-400/rev.R
December 2010
INSTALLATION
SENSOR SPECIFICATIONS
SPECIFICATIONS
MODEL 400 MODEL 400 VP FLOW CELL PN 24091-02
Wetted Materials titanium, PEEK (glass-filled), titanium, PEEK (glass-filled) , polycarbonate, polyester,
316 SST, EPDM 316 SST, EPDM 316 SST, silicone
Temperature Range stnd: 32-221°F (0-105°C) 32-221°F (0-105°C) 32-158°F (0-70°C)
Maximum Pressure 250 psig (1825 kPa abs) 250 psig (1825 kPa abs) 90 psig (722 kPa abs)
Vacuum Service 7.3 psia (51 kPa abs) 7.3 psia (51 kPa abs)
For additional information, please refer visit our website at
www.emersonprocess.com/raihome/liquid/.
Keep 1/4 in. (6 mm) clearance between electrodes and piping. The electrodes must be completely submerged in the
process liquid, i.e., to the level of the threaded connection. See Figures 1 - 6 for recommended orientation and installa-
tion. Models 400 and 400VP sensors with 0.1 and 1.0/cm cell constants can be installed in 3/4-inch pipe tees. All Model
400 and 400VP sensors can be installed in 1-inch tees with a 3/4-inch bushing.
If the sensor is installed in a pipe tee or flow cell with the sample draining to open atmosphere, bubbles may accumulate
on the electrodes. Trapped bubbles will cause errors. As bubbles accumulate, the conductivity reading normally drifts
down. In the plastic flow cell, bubbles are readily visible. To control bubble formation, apply a small amount of back pres-
sure to the flow cell or pipe tee.
-60: 32-392°F (0-200°C)
(requires sensor-mounted
junction box)
The wetted sensor materials may not be compatible
with process com position and operating conditions.
Application compat ibility is entirely the
responsi-
bility of the user.
CAUTION
SENSOR/PROCESS
APPLICATION COMPATIBILITY
WARNING
Before removing the sensor, be absolutely certain
that the process pressure is reduced to 0 psig and
the process temperature is lowered to a safe level!
WARNING
Model 400 and 400 VP
ENDURANCE
™
Conductivity Sensors