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on either the process side of the power/electrical side and they can even occur through the atmosphere/air.
As such the pH/ORP sensor should be installed as far away as possible from high current carrying equipment such
as pumps, motors, variable speed drives etc.
Position-Sensitive Sensors
It is recommended that pH Sensors be optimally installed at a 45° angle as this avoids air bubbles being trapped
at the sensor/process interface and ensures optimal glass/silver-chloride interaction. It is also acceptable to
install vertically down. pH sensors should never be installed inverted (ie upside down) or below the horizontal
axis. They must be at least 15° above the horizontal axis.
Position Insensitive Sensors
For ORP and Conductivity, these are both positions insensitive, meaning the sensor can be installed at any angle.
pH and Dissolved Oxygen on the other hand are not, and must always be in the vertically down position. It is still
recommended to install these sensors vertically down (tip down) for several good reasons:
•
Upside down is messy and can result in product spillage and overflow.
•
It can be unsafe if the process is not isolated correctly.
•
Product with any solids… solids can settle out and get trapped in the sensor tip and cause excess fouling.
•
People see an ORP or Conductivity sensor upside…. They then install a pH or DO sensor upside down
(which is not good).
Should you require any more assistance regarding the installation of our sensors, please contact Turtle Tough.
