Function; Ideal Saturation Level In Hydraulic And Lubrication Systems - HYDAC AS 1000 Benutzerhandbuch

Aqua Sensor AS 1000

4 Function

AquaSensors in the series AS 1000 are water and temperature sensors designed for the
permanent and precise online monitoring of hydraulic and lubrication fluids.
They measure the water content relative to the degree of saturation (saturation level),
where 0% means the oil is free from water and 100% means the oil is fully saturated with
water.
The capacitive sensor used to measure the the saturation level absorbs water molecules
from the fluid which produces a change in capacitance on the sensor element. The value
obtained represents the degree of saturation of the fluid as a percentage.
A thermocouple integrated on the sensor measures the temperature in the range from
-25 to 100°C.
In the version with 2 switch outputs, the switch outputs switch according to the saturation
level and the pre-set switching parameters. You have the option of individually adapting the
AS 1000 sensor to the relevant application by means of the HYDAC service devices HMG
3010 and HMG 4000, the Condition Monitoring Unit CMU 1000 and the Condition
Monitorung Interface Module CSI-B2.

4.1 Ideal saturation level in hydraulic and lubrication systems

Since the effects of free (or emulsified) water are more harmful than those of dissolved
water, water levels should remain well below the saturation point. However, even water in
solution can cause damage. Therefore, every reasonable effort should be made to keep
saturation levels as low as possible. There is no such thing as "too little water" in hydraulic
and lubrication fluids!
As a guide, we recommend that saturation levels remain below 45% in all systems.
Saturation Level
Edition: 2017-07-17
100%
75 %
50 %
25 %
0 %
HYDAC ELECTRONIC GMBH
Saturation-
point
5
E
Part No.: 669705