YOKOGAWA SC72 - Wetted Part Materials of Sensors

IM 12D03D02-01E
7-4
7. Measuring Principles of this Instrument
• Checking if meter is working correctly
When the temperature coe󰀩cient already set is accurate, the conductivity displayed
should be constant regardless of liquid temperature (within permitted temperature
range).
Check that the temperature coe󰀩cient already set is accurate. When the liquid
temperature is lowered, if a larger conductivity is indicated, the temperature
coe󰀩cient already set is too small; whereas, if a smaller conductivity is indicated,
the temperature coe󰀩cient already set is too large. In such a case, change the
temperature coe󰀩cient such that the measured conductivity does not change with
temperature.
7.4 Wetted Part Materials of Sensors
• For general-purpose sensor
Titanium (sensor)
Polyphenylene sulte resin, Polypropylene resin (insulated area and cover)
Fluoro rubber (O-ring)
• Sensor for high purity water measurement
SUS 316 stainless steel (electrode element)
Polypropylene resin (insulated area)
Fluoro rubber (O-ring)
• Chemical-resistant sensor
Glass, platinum black (electrode element)
• Sensor for high-conductivity measurement
Glass, platinum black (electrode element)