Page 17
www.argo-hytos.com
LubCos H
2
O+ II
Continuous Oil Condition Monitoring
Lubricant Condition Sensor
LubCos H
2
O+ II
Application area
Stationary screw-in sensor for continuous determination of the
oil condition, humidity and temperature in hydraulic and
lubricating oils.
Performance features
Measurement of changes in hydraulic fl uids and lubricants. Data
is continuously documented evaluated and stored. In that way
deterioration and changes in the oil (e.g. water inleakage, oil
change, ...) can be indicated. Through this, damage can be
recognized or completely avoided at an early stage. This offers
the opportunity to prevent machine failures as well as to prolong
maintenance and oil change intervals by means of appropriate
measures. Furthermore, by monitoring the lubricant, correctly
performed maintenance work and the use of the required
lubricant quality may be documented.
Measuring principle
The sensor records the following physical oil characteristics as
well as its periodic change: Temperature, relative oil humidity
and water activity resp., relative dielectric number
(relative permittivity) and conductivity of the fl uid.
As especially the conductivity and the relative dielectric number
show a strong connection to the temperature, next to the
characteristic values at current temperature the sensor also sends
the data at reference temperature (40 °C / 104 °F). The sensor is
able to evaluate condition changes automatically.
Design characteristics
The sensor is provided with a G¾ thread and can be integrated
in the tank.
The communication with the sensor either takes place over
a serial RS 232 interface, two analogue outputs (4 ... 20 mA) or
CANopen.
In order to also enable a long-term record of data up to half a
year, the sensor is provided with an internal data storage unit.
Software
A free software for data recording and evaluation of the
measured values can be downloaded from our website at
www.argo-hytos.com > Products > Sensors & Measurements >
Software.
Description
* mm
Ø42 mm (Ø1.65 inch)
M12 x 1*
10 mm (0.39 inch)137 mm (5.39 inch)
77 mm (3.03 inch)
sealing ring
DIN 3869-HNBR70
G¾
Ø22 mm (Ø0.87 inch)
47 mm (1.85 inch)
AF 32*
label
14 mm (0.55 inch)
Dimensions
Subject to change · 100.05-EN/US · 0919
Page 18
www.argo-hytos.com
Application example
By using the sensor different changes of the oil condition can be
detected. The following example shows a typical course of
relative dielectric number, conductivity and relative humidity
during various changes of the condition in the system. By means
of the characteristics, different oil types may be differed, oil
refreshing and oil change can be detected and the relative
humidity, free water as well as the deterioration and deterioration
rate can be defined respectively.
G
r.H.
5000
4000
3000
2000
1000
0
relative humidity r.H. [%]
conductivity G at
40 ºC (104 °F) [pS/m]
free water
drying
water
ingress
ε
NZ
oil 1
11 l
refill oil 1
5 l
oil change to oil 2
11 l
relative dielectric number at
40 ºC (104 °F) [-]
total acid number NZ [mg
KOH
/g
oil
]
time
time
2,0
1,6
1,2
0,8
0,4
0
3,4
3,2
3,0
2,8
2,6
2,4
100
80
60
40
20
0
Sensor data Size Unit
Output
Power output (2x)
4
Accuracy power output
5
Interfaces
4 ... 20
± 2
RS 232/CANopen
mA
%
-
Connections
Threaded connection
Tightening torque of
threaded connection
Electrical connection
Tightening torque
M12-connection
G¾
45 ±4.5
M12 x 1, 8-pole
0.1
inch
Nm
-
Nm
Measuring range
Rel. dielectric number
Rel. humidity
Conductivity
Temperature
1 ... 7
0 ... 100
100 ... 800,000
-20 ... +85
(-4 ... +185
-
% r.H.
pS/m
°C
°F)
Measuring resolution
Rel. dielectric number
Rel. humidity
Conductivity
Temperature
1*10
-4
0.1
1
0.1
-
% r.H.
pS/m
K
Measuring accuracy
6
Rel. dielectric number
7
Rel. humidity (10 ... 90%)
8
Rel. humidity (<10%, >90%)
8
Conductivity (100 ... 2000 pS/m)
Conductivity
(2000 ... 800,000 pS/m)
Temperature
rel. ±0.015
±3
±5
±200
Typ. < ±10
±2
-
% r.H.
% r.H.
pS/m
%
K
Response time humidity
measurement (0 to 100%)
<10 min
Weight 140 g
1
Outside the specified measuring range, there are possibly no plausible
measuring values to be expected
2
With screwed on connector
3
Automatic switch off at U <8 V and U >36 V,
with load-dump impulses over 50V an external protection must be provided
4
Outputs IOut1 and IOut2 are freely configurable
(see interfaces and communication commands)
5
In relation to the analogue current signal (4 ... 20 mA)
6
Works calibration
7
Calibrated to n-Pentan at 25 °C (77 °F)
8
Calibrated to air at room temperature
Technical data
Sensor data Size Unit
Max. operating pressure 50 (725) bar (psi)
Operating conditions
Temperature
1
Rel. humidity
1
-20 ... +85
(-4 ... +185
0 ... 100
°C
°F)
% r.H.
(non-condensing)
Compatible fluids mineral oils
(H, HL, HLP, HLPD, HVLP),
synthetic esters
(HETG, HEPG, HEES, HEPR),
polyalkylenglycols (PAG),
zinc and ash-free oils (ZAF),
polyalphaolefins (PAO)
Wetted materials aluminum, HNBR,
polyurethane resin, epoxy resin,
chemical nickel/gold (ENIG),
soldering tin (Sn96,5Ag3CuO,5NiGe),
aluminum oxide,
glass (DuPont QQ550)
gold, silver-palladium
Protection class
2
IP67
Power supply
3
9 ... 33 V
Power input max. 0.2 A
LubCos H
2
O+ II SCSO 100-1010
LubCos H
2
O+ II SAE J1939 SCSO 100-1010J
Accessories
Screw-in block for mounting in
a return line, connection G¾
SCSO 100-5070
Complete data cable set, 5 m (16 ft) length SCSO 100-5030
Data cable with open ends, 5 m
(16 ft) length
SCSO 100-5020
Contact box for connection of
a data cable
SCSO 100-5010
USB adapter - RS 232 serial PPCO 100-5420
Power supply SCSO 100-5080
Ethernet - RS 232 gateway SCSO 100-5100
Display and storage device
LubMon Visu
SCSO 900-1000
Order code
Subject to change · 100.05-EN/US · 0919
