Transmitter Series EE36 are specially designed for the measurement of water content in
oil, it can be portable or online use. They are certified in accordance with the regulations
of the "Germanischen Lloyd (GL)" and therefore can be utilized in the maritime field as well.
EE36 is ideal for online monitoring of moisture in lubrication or insulation oil after installing
on equipments, which is very important for the long-term performance and adaptive
maintenance of plant and machinery. For instance, moisture affects dramatically the
insulation characteristics of electrical transformer oil and therefore continuous monitoring
is extremely important. The modular housing enables a user-friendly operation and a quick
replacement of the sensor unit for service purposes. The construction of the transmitter
makes field and local loop calibration an easy task.
Humidity measurement in oil
Similar to the humidity in the air, the water content in oil can be described by the absolute
value in ppm or by the relative value aw:
PPM (mass of water / mass of oil)
AW (actual water content as fraction of the water content in the saturated oil) aw = 0
corresponds to water-free oil, while aw = 1 describes fully saturated oil
aw measurement with EE36 transmitter series is based on the outstanding long term
stability and resistance to pollution of the E+E capacitive sensor elements series HC.
The physical quantities measured are water activity aw and temperature T. With these
quantities EE36 calculates the water content (ppm) in mineral transformer oils. Calculation
of water content in non-mineral transformer oils and lubrication oils can be accomplished by downloading specific
parameters of the oil.
The measured and the calculated values are available on two free scaleable and
configurable analogue outputs. In addition, an optional relay output can be used for
alarms and process control.
The sensing probe is designed for inline monitoring and can be placed directly in the oil,
at pressures up to 10 bar. In addition to direct mounting of the sensing probe, a ball valve
installation provides mounting and removal of the probe without interrupting the process.
Easy Calibration and Adjustment of EE36
The user can easily readjust or calibrate the transmitter by using either a simple procedure
with two push buttons on the printed circuit board or the configuration software.
|Power supply:||8-35V DC, 12-30AC. ( Option: Built-in 100-240AV, 50/60HZ)|
|Output||0-5V, 0-10V, 4-20mA, 0-20mA|
|Measuring range||0...1 aw, 0~500 ppm (Option:0~ 1000/10000 ppm)|
|Temperature range||-40~ 180°C|
|Accuracy||± 0.013~± 0.015 aw, ± 0.005°C|
|Sensor Pressure Range||0.01~20bar|