Yokogawa PH72 Personal pH/ORP Meter - Manual (Page 79)

IM 12B03D02-01E 9-12
9. Technical Information
9.10 Wetted Part Materials of Sensors
• General pH Sensors
Polypropylene resin (sensor body, protective cover)
Glass (glass electrode, temperature element protective tube)
Ceramics (liquid junction)
Silicon rubber (sensor seal)
- When cable is immersed (KCl replenish-free type)
Rigid polyethylene (sensor grip)
PVC (sensor cable)
Ethylene propylene rubber (sensor grip, cable connection)
• Needle type pH sensor
Glass (sensor)
• Test tube size pH sensor
Glass (sensor)
• ORP sensor
Polypropylene resin (sensor body, protective cover)
Platinum (electrode)
Glass (glass electrode, temperature element protective tube)
Ceramic (liquid junction)
Silicon rubber (sensor seal)
9.11 References
• JIS Z8802-1984, Methods for Determination of pH of Aqueous Solutions
• Moore, W. J., Basic Physical Chemistry, Prentice-Hall, Inc., U.S.A. 1983
• Donald, Andrzej, Julian, Electrochemistry for chemists 2nd Ed., Maruzen 2003
• Bates, R. G., Determination of pH: theory and practice 2nd Ed., John Wiley &
Sons, Inc.,1973