TURTLE
TOUGH
®
10
Sensor Maintenance
The M4S TOUGH Dissolved Oxygen Sensors are extremely
corrosion, vibration, and knock resistant, due to their design
and construction.
•
The sensor body (6) and most other sensor components are
made of plastic material suitable for recycling.
•
The visible cathode (3) consists of fine silver in the case of
the “active” sensor and of gold in the case of the “passive”
sensor.
•
The anode, which can only be seen through the automatic
pressure compensation (7), consists of lead or, in the case
of the “passive” sensor, of silver.
•
Directly behind the cathode (not visible!), there are two
temperature sensors for supporting the display and com-
pensation of the temperature.
•
The cathode membrane (2) is the most sensitive part of the
sensor, although it is made of a strong Teflon material. It
is held by means of two red collars (4) and one O-Ring (5).
During measurements, the membrane must not come into
contact with sharp objects such as stones or sharp-grained
sand, which might damage the membrane surface.
•
The sensor tip is provided with a screw-on protection cap (1).
•
The active sensor elements and the electrolyte tank are
dimensioned to permit application with great long-term
stability. The theoretical life amounts to at least 20 years.
•
We offer our sensors in two different types: the “active”
and the “passive” sensors. The outer design of both systems
are nearly the same, the selection of the electrode materials
and of the electrolyte are different:
Element
Active Sensor
Passive Sensor
Cathode
Silver
Gold
Anode
Lead
Silver
Electrolyte
Liquid
Liquid
Material of sensor body
PVC
PVC
Membrane
Teflon
Teflon
Pressure compensation
Automatic
Automatic
Temp. compensation
Automatic
Automatic
Max operation temp.
50 °C
50 °C
Calibration
Single point air Single point air
