Instruction Sheet
PN
Model 400 and 400 VP
ENDURANCE™ Conductivity Sensors
For additional information, please refer visit our website at
www.emersonprocess.com/raihome/liquid/.
CAUTION
SENSOR/PROCESS
APPLICATION COMPATIBILITY
The wetted sensor materials may not be compatible with process composition and operating conditions. Application compatibility is entirely the responsi- bility of the user.
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!
SENSOR SPECIFICATIONS
SPECIFICATIONS | MODEL 400 | MODEL 400 VP | FLOW CELL PN |
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Wetted Materials | titanium, PEEK | titanium, PEEK | polycarbonate, polyester, |
| 316 SST, EPDM | 316 SST, EPDM | 316 SST, silicone |
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Temperature Range | stnd: | ||
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| junction box) |
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Maximum Pressure | 250 psig (1825 kPa abs) | 250 psig (1825 kPa abs) | 90 psig (722 kPa abs) |
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Vacuum Service | 7.3 psia (51 kPa abs) | 7.3 psia (51 kPa abs) |
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INSTALLATION
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
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.
