Oil level sensors - hella.com · What can you expect? This is the “oil level sensors” section of the overall “Hella sensors and actuators” catalogue. The sensors can be used

Oil level sensors

What can you expect?

This is the “oil level sensors” section of the overall “Hella sensors

and actuators” catalogue. The sensors can be used for a wide

range of applications from the acquisition of the minimum oil level

to the continual measurement of the oil level. You know yourself

how broad and varied the range of applications for these parts is

– both for specific areas and products. With this summary we

would like to give you the opportunity to discover how you can

use Hella quality in your area of responsibility. This can certainly

be worth your while, because the overall quality of a product

always depends on the quality of its individual part.

About the contents

This brochure contains the key technical data required to

evaluate a sensor, its application use and integration in an overall

system. The summary at the bottom of this page and on the right

show you examples of areas where Hella oil level sensors and

actuators can be used. These are only suggestions, of course.

About Hella oil level sensors and actuators

They are manufactured in large-scale production in high Original

Equipment Manufacturer quality for the automotive industry. The

range of uses covers passenger cars, trucks and special vehicles

such as tractors, construction machinery, fork lift trucks, mobile

homes and buses. Their universality makes them suitable for a

wide range of industrial applications as well, of course – e.g. in

automation, mechanical engineering, environmental engineering

and the field of heating/sanitary equipment.

Discover the possibilities

Subject to technical and factual modifications. Hella does not accept any liability for the function of your overall system, only for the components described and their product features.

Overview of variants

Level sensors Examples in vehicles Examples for possible applications in the industrial field

Recording or measuring levels.

Monitoring the level in windscreen washer fluid tanks (washer fluid supply switches). Monitoring or measurement of the level of motor oil in the engine (oil level switch or oil level sensors).

Monitoring or measurement of the level (water or oil) in supply tanks, oil tanks, wind power plants, block heat and power plants, stationary motors etc.

Use our customer support

Contact us by phone or e-mail and we can discuss all the

detailed technical aspects with you. Naturally, we can support

you in your choice of components and its electrical integration.

We can send you sample sensors and actuators on request.

What we still have to tell you

We are sure you understand that Hella cannot accept liability for

the function of the systems Hella sensors and actuators are used

in. Our liability only covers the components described and their

product characteristics.

Phone + 49 29 41 38-3 11 74

Fax + 49 29 41 38-4 73 11 74

www.hella.com/electric-electronics-components

E-Mail: [email protected]

2 I Hella

Application overviewSolutions for Special OE Engine Manufactures

NTC temperature sensors

Measurement of liquid and air temperature

� For universal use for measuring the temperature

of liquids

� Suitable for media such as oils, coolants and fuels

�Measuring range -40 °C to +155 °C

� New sensor variant for charge air temperature

measurement with a reaction time of ≤ 15 sec

Universal pressure sensors

Pressure measurement for oil and fuel

� Pressure measurement

from 0 to 10 bar

� Can be used with a broad range

of diff erent liquids and gases

� Two thread sizes: M14 and M18

Ultrasonic oil level and temperature sensor

For continual oil level and temperature measurement

� Continual measurement of the level of motor

oil in the static and dynamic range.

� Compact sensor architecture with a multi-chip module

� Integrated temperature sensor

� Immediate measurement after switch-on

Angle position sensor

Accelerator sensor angle measurement

� Individual or passive sensors

� High precision thanks to

internal 14 bit resolution

� High thermal stability and linearity

� Insensitive to magnetic fi elds

Accelerator pedal

Upright and pendant

� Contact-less measuring system

� Slim and sturdy design

� Simple mechanical connection

� Passive output signal

� High measuring accuracy and

resistance to interference

Oil level sensor

Acquisition of oil level

� Compact sensor design

� Installed in the oil pan

� Simple electrical connection

Further Solutions

Hella I 3

Product features

� Compact sensor

� Installed in the oil pan

� Simple electrical connection

� Principally used for motor oil

� Application in further media possible

Structure and function

The oil level switch is made up of a Reed contact and a float

which is actuated by its buoyancy behaviour depending on the

level of fluid. When the Reed switch is opened, this indicates that

the level has fallen below the fixed switching point of the oil level

switch. Since the oil level switch is closed above the minimum

level, this can be used to diagnose a faulty function. The oil level

switch signal is evaluated via a customer-specific evaluation

algorithm which is stored in the vehicle control unit/controller. The

minimum warning is triggered by a defined switch-off length of

the signal within the evaluation algorithm.

This sensor variant can be installed on the bottom of the oil pan.

The oil level switch is usually situated on a ledge in the oil pan or

on an additional holder, so that the minimum level of the

application can be adapted to that of the oil level switch.

Sensors Level sensors

Acquisition of fluid levels (static or dynamic)

Use

This level switch is used to monitor levels. Its main field of

application is the monitoring of the level of motor oil and thus

ensuring there is a minimum filling level in the static range (engine

at a standstill) or dynamic range (engine in operation) in various

vehicle motors including tractors, fork lift trucks, construction

machinery, special vehicles etc.. In addition, the straightforward

application allows the sensor to be used in industrial applications

to guarantee minimum levels are never exceeded.

4 I Hella

Tank

(e. g. Oil pan)

Connector

Switching point

Static or dynamic

minimum level


Installation Two-way connector Material Part number Technical data on page

Interior, with 190 mm cable(e.g. on bottom of oil pan)

Delphi ZFW2-141 or Bosch ZFW2-83

PA6, 6T Ultramid TKR 4350, black (housing)

6PR 232 000-001 6

Interior, with 275 mm cable(e.g. on bottom of oil pan)

Delphi ZFW2-141 or Bosch ZFW2-83

PA6, 6T Ultramid TKR 4350, black (housing)

6PR 232 000-011 8

Principle sketch (oil pan installation)

Hella I 5

SensorsLevel sensors


Part number 6PR 232 000-001

Technical data

Switchpoint 29 ± 1 mm

Max. slant of the oil level switch

≤ 8°

Supply voltage 5 V ± 5 % or 14.5 V ± 5 %

Switching current min. 5 mA/typ. 12 mA/max. 20 mA

Pin 1 Signal

Pin 2 Ground

Voltage drop max. 2 mV

Insulation resistance > 1 MΩ at 500 V DC voltage for 60 sec.

Dielectric strength up to 500 Veff.

With AC voltage (50 Hz) and 2 sec.

Permanent operating temperature -40 °C to +150 °C

Qualified oils Standard motor oils (e. g. Shell Helix Ultra 5W30)

Resistant to

Exhaust gases, dust, diesel fuels in accordance with DIN EN 590, rapeseed oil (E DIN 51606), lead-free fuels (DIN

EN 339), brake fluid DOT4, hydraulic oil Pentosin CHF 11S

Service life 50,000 switching cycles

Storage temperature -40 °C to +70 °C

Operating pressure -5 kPa to 0 kPa

Protective rating of the connector seal to the oil pan

IP 69K

Weight ≤ 60 g

Cable length 190 + 15 mm

Cable cross-section 2 x 0.8 mm

Cable insulation material Polyester Betax-HX FL 33 x 33 x 109

Individual wire tin-plated, oil-resistant

Connector housing material PA66 Zytel 70G35 HSLX black BK 357

Original connector material ACM or AEM, black, Shore hardness 70 ± 5

Oil level switch housing material PA6, 6T Ultramid TKR 4350, black

Base plate material oil level switch

PA66 Zytel 70G35 HSLX, black, BK 357

Bushing material CuZn 39Pb3 R430 EN12164

Contact material Bd EN 1652 O. 6 CuNi10Fe1Mn

Float material PA6 Ultramid B3S, natural coloured

Reed contact Contact wire alloy 52 F52 %Ni48 %, Ri = 100 m Ω max.

Magnet material Hard ferrite 24/23, M = 10.33 ± 0.9 x 10 -6 Vscm

Air-tightness of connector up to 50 ± 5 kPa oil pressure

Connector Bosch compact connector 1928 497 999 E

Pin coatinggalv. silver-coated 2701 according to Hella Norm 47102-

6(layer thickness according to DIN 50987 min 3 μm Ag)

Two-way connector1) Delphi ZFW2-141 or Bosch ZFW2-83

Technical data

Vibration resistance (carried out in succession) Sinus-shaped (in accordance with IEC 60068-2-6) greatest offset at 100 Hz: 0.177 mm, 200 Hz: 280 m/s2, 220 Hz: 280 m/s2, 240 Hz: 160 m/s2, 320 Hz: 160 m/s2, 340 Hz: 125 m/s2, 440 Hz: 125 m/s2 Broadband noise (in accordance with IEC 60068-2-64) Eff. total acceleration = 170 m/s2

10 Hz: 10 (m/s2)2/Hz, 100 Hz: 10 (m/s2)2/Hz, 300 Hz: 0.51 (m/s2)2/Hz, 500 Hz: 45.6 (m/s2)2/Hz, 1500 Hz: 15.26 (m/s2)2/Hz

Magnetic properties must be checked for every application.

1) These accessories are not inclued as part of the sensor. To be purchased from Bosch/Delphi.

6 I Hella

Ø7

6.5

50

True length 190 +15

15

Ø24 + 0.05

1.7

± 0.

1

30º ± 0.3

12.1

± 0

.1

Ø50

Mounting Hole for Plughousing

Mounting point for switch

Area sets free formounting of the plug

M67

100º

14

min

. 15

50 ± 0.2


Ø34

40.6

Switchpoint

29

37

Ø 4.5

Technical drawing

Hella I 7




Technical data

Switchpoint 29 ± 1 mm

Max. slant of the oil level switch

≤ 8°

Supply voltage 5 V ± 5 % or 14.5 V ± 5 %

Switching current min. 5 mA/typ. 12 mA/max. 20 mA

Pin 1 Signal

Pin 2 Ground

Voltage drop max. 2 mV

Insulation resistance > 1 MΩ at 500 V DC voltage for 60 sec.

Dielectric strength up to 500 Veff.

With AC voltage (50 Hz) and 2 sec.

Permanent operating temperature -40 °C to +150 °C

Qualified oils Standard motor oils (e. g. Shell Helix Ultra 5W30)

Resistant to

Exhaust gases, dust, diesel fuels in accordance with DIN EN 590, rapeseed oil (E DIN 51606), lead-free fuels (DIN

EN 339), brake fluid DOT4, hydraulic oil Pentosin CHF 11S

Service life 50,000 switching cycles


Operating pressure -5 kPa to 0 kPa

Protective rating of the connector seal to the oil pan

IP 69K

Weight ≤ 60 g

Cable length 275 + 15 mm

Cable cross-section 2 x 0.8 mm

Cable insulation material Polyester Betax-HX FL 33 x 33 x 109

Individual wire tin-plated, oil-resistant

Connector housing material PA66 Zytel 70G35 HSLX black BK 357

Original connector material ACM or AEM, black, Shore hardness 70 ± 5

Oil level switch housing material PA6, 6T Ultramid TKR 4350, black

Base plate material oil level switch

PA66 Zytel 70G35 HSLX, black, BK 357

Bushing material CuZn 39Pb3 R430 EN12164

Contact material Bd EN 1652 O. 6 CuNi10Fe1Mn

Float material PA6 Ultramid B3S, natural coloured

Reed contact Contact wire alloy 52 F52 %Ni48 %, Ri = 100 m Ω max.

Magnet material Hard ferrite 24/23, M = 10.33 ± 0.9 x 10 -6 Vscm

Air-tightness of connector up to 50 ± 5 kPa oil pressure

Plug Bosch compact connector 1928 497 999 E

Pin coatinggalv. silver-coated 2701 according to Hella Norm 47102-

6(layer thickness according to DIN 50987 min 3 μm Ag)

Two-way connector1) Delphi ZFW2-141 or Bosch ZFW2-83

Technical data

Vibration resistance (carried out in succession)Sinus-shaped (in accordance with IEC 60068-2-6)greatest offset at 100 Hz: 0.177 mm,200 Hz: 280 m/s2, 220 Hz: 280 m/s2, 240 Hz: 160 m/s2,320 Hz: 160 m/s2, 340 Hz: 125 m/s2, 440 Hz: 125 m/s2

Broadband noise (in accordance with IEC 60068-2-64)Eff. total acceleration = 170 m/s2

10 Hz: 10 (m/s2)2/Hz, 100 Hz: 10 (m/s2)2/Hz,300 Hz: 0.51 (m/s2)2/Hz, 500 Hz: 45.6 (m/s2)2/Hz,1500 Hz: 15.26 (m/s2)2/Hz

Magnetic properties must be checked for every application.

1) These accessories are not supplied as part of the sensor. To be purchased from Bosch/Delphi.

8 I Hella

Dimensions

Ø7

6.5

50

True length 190 +15

15

Ø24 + 0.05

1.7

± 0.

1

30º ± 0.3

12.1

± 0

.1

Ø50

Mounting Hole for Plughousing


Area sets free formounting of the plug

M67

100º

14

min

. 15

50 ± 0.2


Ø34

40.6

Switchpoint

29

37

Ø 4.5

Hella I 9

Principle sketch of the 5 V version

Principle sketch of the 12 V version

Product features

� Continual measurement of the level of motor

oil in the static and dynamic range

� Compact sensor architecture with a multi-chip module

� Integrated temperature sensor

� Immediate measurement after switch-on

Structure and function

The sensor architecture of the oil level sensor PULS (Packed

Ultrasonic Level Sensor) comprises one single multi-chip module

which integrates the ultrasonic and temperature sensor as well as

an ASIC (Application Specific Integrated Circuit). The

compactness of our sensors increases their impact and vibration

resistance compared with sensors that are fitted with numerous

electronic components. The ultrasonic sensor integrated in the

multi-chip module transmits a signal that is reflected by the

bounding surface between the motor oil and the air.

The signal’s running time is measured and the filling level is

calculated depending on the speed of sound in the medium. The

attenuation cup attached above the multi-chip module serves to

calm the medium (particularly) in the dynamic measuring range.

The attenuation cup has openings on the base and at the tip

which allow permanent oil flow.


Measurement of fluid levels (static and dynamic)

Static measurement range 129 mm

Dynamic measurement range 96 mmTransition zone

Damping cupExample of dynamic oil minimum

Example of static oil minimum

Static or dynamic measurement range 45 mm

Transition zone

Damping cup

Example of static or dynamic oil minimum

Use

In vehicles, oil sensors ensure that the engine cannot work

unnoticed with too little oil. The tried-and-trusted technology of

the ultrasonic sensors works on the delay time principle and

records the filling level continuously during the trip. During engine

operation (dynamic measuring range) the filling level is

significantly lower than when the engine is at a standstill (static

measuring range). A dipstick only records the oil level of mobile

engines in the static range. This oil level sensor can measure the

oil level continuously, i.e. both in the dynamic and in the static

range. It thus provides information about the oil level within the

whole period of engine operation, which can often be several

hours in the case of construction machinery, tractors and fork lift

trucks. The sensor monitors the oil level continuously during the

entire engine operation, which means the oil level can be

prevented from falling below the minimum level during operation,

which in turn means the oil film is not interrupted (which would

lead to engine damage). Secondary influences such as the slope

of the vehicle, lateral and longitudinal accelerations, are

compensated by the vehicle control unit calculating a mean

value.

10 I Hella

Temperature

Analysis

Control unit /

pull up (e.g. 3.9/10k Omh)

5V/12V

Oil Level

A

15

A

31

A

15

31

Installation

The sensor has been designed for vertical installation from below,

directly into the bottom of an oil pan. The oil level sensor is usually

located on a ledge in the oil pan to protect the sensor base. This

installation location in connection with the ventilation opening in

the cap make a permanent oil flow possible, preventing sludge

accumulation within the attenuation cup.

Block circuit diagram


Installation Supply voltage Measuring range Part number Technical data on page

From below 12 V static 129 mm, dynamic 96 mm

6PR 009 622-051 12

From below 5 V static or dynamic 45 mm

6PR 009 622-041 15

Hella I 11




GASKET MUST BE ONLY USED ONCE IN PRESSED CONDITION

VENTILATION OPENING

DYNAMIC MEASUREMENT RANGE 96 mm

STATICMEASUREMENT RANGE 129 mm

Ø 40

Mechanical offset 18 mm

147 mm

Ø 60

Ø 110°

Ø 130°

Ø 1

0°

3x Ø 6.6

Technical data

Measuring range (static) 129 mm

Measuring range (dynamic) 96 mm

Mechanical offset 18 mm

Accuracy (absolute)1) ± 3 mm

Accuracy in the transition area2) of the attenuation cup

-2 to +4 mm

Reaction time for level measurement < 1 ms

Maximum slope of the sensor (installation)

4° in all directions

Sensor slope (operation, static) (operation, dynamic)

min. 10° min. 20°

Qualified oils Standard motor oils (e.g. Castrol 10W30)

Nominal voltage 12 V

Voltage range 9 V to 16 V

Temperature measuring range -40 °C to +160 °C

Accuracy (between 60 °C and 120 °C)3) ± 2 K

Reaction time for temperature measurement

< 1 ms

Output PWM (open collector, lowside)

Signal output voltage (high) (low)

corresp. to voltage range max. 1 V

Signal output current (high) (low, max.) (low, ref.)

20 μA 10 mA 2 mA

Load (pull-up resistor) 1.6–10 kΩ

Current consumption 6 mA (typical)

Current consumption (peak) (pulse generation)

max. 50 mA

Output voltage 5 V... UB

Operating temperature -40 °C to +150 °C


EMC on request

Temperature resistance (IEC 60068-2-2)

750 h at 150 °C

Resistant to Brake fluid, petrol, salt, battery filling agent

Vibration resistance (IEC 60068-2-6)DirectionDurationTemperature rangeTest environmentSpeed of temperature changeNo measurement during the test

in three directions (X, Y, Z)t = 216 hours, 72 hours per direction

-40 °C to +140 °COil (Castrol SLX R-tec); level ~ 21 mm

1K/min (25 cycles per direction)10–50 Hz -> 1 g

50–250 Hz -> 15 g250–2500 Hz -> 35 g

Shock resistance (IEC 60068-2-27)AccelerationDurationNumber of cyclesTest environment

± 100 g10 ms6/axis

20 °C airNo measurement during the test

Technical data

Maximum operating pressure: Sensor only contains electronic components and no glass components such as Reed contact. The typical pressure in an oil pan is around 0.5 bar. The functional ability of the sensor is independent of the ambient pressure. The sensor seal is the same as with a pressure sensor. For this reason, theoretical ambient pressures of up to 40 bar are possible.

Housing material Polyamide 66, 36 % fibreglass

Sealing ring AEM 70 ± 5 Shore A (ethylene acrylate rubber)

Pin material CuNi10

Pin coating Silver

Two-way connector4) Kostal no. 09 44 13 82

Protective rating (connector) IP 69K

Service life 15 years or 300,000 km

1) In the temperature range from 0 °C to 150 °C, ± 2 mm accuracy at ≤ 100 mm and 30 °C to 120 °C

2) In the temperature range from 30 °C to 150 °C

3) ± 3K in the temperature range – 40 °C to 60 °C and 120 °C to 160 °C

4) These accessories are not supplied as part of the sensor. To be purchased from Kostal.

Technical drawing

12 I Hella

TTemp.

22ms

20%

T1 Temperature

10ms920ms

Startup/Checksum

T=110ms

22ms

T=110ms

TLevel

TT2 Level

68,2ms

T=1210ms

T 3

T1T3

1141,8ms

=1000msTSignal

20% 80%80%

Start Repetition

SEALING AREA FREE OFF BURRMAX. ACCEPTED CIRC. RADII R0. 3mmOPTIONALLY CHAMFER CIRC. 0.3 mm X 45°

Rz 25 M6

Ø 40.5

22

17

126.1

Pin 1 terminal 15 VBatt

Pin 3 OUTPUT

Pin 2 terminal 31 GND

16.25

12.25

Technical drawing

PWM (open collector) signal evaluation

Hella I 13

Star check sum = 920 ms

PWM blocking period T = 110 ms

PWM blocking period T3 = 68,2 ms (fixed)

Total PWM blocking period TSignal = 1000 ms

Pause signal 670 ms

Tolerance of all time signals (from PWM cycle) ± 10 %

Calculation in the control unit

Level (mm) = [(T2/T-0.2) x 215 + 12.66] x + 5.34T

110

Temp (°C) =(T1/T - 0.32)

0.003



Level Duty Cycle (DC2)DC

18.0mm

80%88ms

20%22ms

T2(Tlevel)

147mm

Level Duty Cycle (D2)

20 % of the PWM blocking period T1 (22 ms)

corresponds to the lowest measuring point of the

measuring range of -40 °C


corresponds to the highest point of the

measuring range of 160 °C



measuring range of 18 mm



measuring range of 147 mm

Temperature Duty Cycle (DC1)DC

-40ºC

80%88ms

20%22ms

T1(TTemp)

+160ºC

Temperature Duty Cycle (D1)

All the calculation data only apply for standard motor oil on

account of the dependence between ultrasonic speed and

density of the medium.

Consequently, the above calculation only works for standard

motor oils (e.g. Castrol 10W30). In the case of other measurable

non-conductive media, the calculation must be checked in the

respective application.

Temperature evaluation (T1 Temp)

Oil filling level evaluation (T2 level)

Basic information about the signal duration

14 I Hella




Ø 60

Ø 110°

Ø 130°

Ø 1

0°

3x Ø 6.6

Technical data

Measuring range (static/dynamic) 45 mm

Mechanical offset 20.9 mm

Accuracy (absolute)1) ± 3 mm

Accuracy in the transition area2)

of the attenuation cup-2 to +4 mm

Reaction time for level measurement < 1 ms

Maximum slope of the sensor (installation)

4° in all directions

Slope of the sensor(operation, static) (operation, dynamic)

min. 10° in. 20°

Qualified oils Standard motor oils (e. g. Castrol 10W30)

Nominal voltage 5 V

Voltage range 4.9 V to 9 V

Temperature measuring range -40 °C to +160 °C

Accuracy (between 60 °C and 120 °C)3) ± 2 K

Reaction time for temperature measurement

< 1 ms

Output PWM (open collector, lowside)

Signal output voltage (high) (low)

corresp. to Voltage rangemax. 1 V

Signal output current (high) (low, max.) (low, ref.)

20 μA 10 mA2 mA

Load (pull-up resistor) 1.6–10 kΩ

Current consumption 6 mA (typical)

Power consumption (peak) (pulse generation)

max. 50 mA

Output voltage 5 V... UB

Operating temperature -40 °C to +150 °C


EMC on request

Temperature resistance (IEC 60068-2-2)

750 h at 150 °C

Resistant to Brake fluid, petrol, salt, battery filling agent

Vibration resistance (IEC 60068-2-6)DirectionDurationTemperature rangeTest environmentSpeed of temperature changeNo measurement during the test

in three directions (X, Y, Z)t = 216 hours, 72 hours per direction

-40°C to +140°COil (Castrol SLX R-tec); level ~ 21 mm

1K/min (25 cycles per direction)10–50 Hz -> 1 g

50–250 Hz -> 15 g250–2500 Hz -> 35 g

Shock resistance (IEC 60068-2-27)AccelerationDurationNumber of cyclesTest environment

± 100 g10 ms6/axis

20 °C air No measurement during the test

Technical data

Maximum operating pressure: Sensor only contains electronic components and no glass components such as Reed contact. The typical pressure in an oil pan is around 0.5 bar. The functional ability of the sensor is independent of the ambient pressure. The sensor seal is the same as with a pressure sensor. For this reason, theoretical ambient pressures of up to 40 bar are possible.

Housing material Polyamide 66, 36 % fibreglass

Sealing ring AEM 70 ± 5 Shore A (ethylene acrylate rubber)

Pin material CuNi10

Pin coating Silver

Two-way connector4) Kostal no. 09 44 13 82

Protective rating (connector) IP 69K

Service life 15 years or 300,000 km

1) In the temperature range from 0 °C to 150 °C, ± 2 mm accuracy at ≤ 100 mm and 30 °C to 120 °C

2) In the temperature range from 30 °C to 150 °C

3) ± 3K in the temperature range – 40 °C to 60 °C and 120 °C to 160 °C

4) These accessories are not supplied as part of the sensor. To be purchased from Kostal.

Hella I 15

TTemp.

22ms

20%

T1 Temperature

10ms920ms

Startup/Checksum

T=110ms

22ms

T=110ms

TLevel

TT2 Level

68,2ms

T=1210ms

T 3

T1T3

1141,8ms

=1000msTSignal

20% 80%80%

Start Repetition

Technical drawing

PWM (open collector) signal evaluation

terminal

terminal

16 I Hella

Star check sum = 920 ms

PWM blocking period T = 110 ms

PWM blocking period T3 = 68,2 ms (fixed)

Total PWM blocking period TSignal = 1000 ms

Pause signal 670 ms

Tolerance of all time signals (from PWM cycle) ± 10 %

Calculation in the control unit

Temp (°C) =(T1/T - 0.32)

0.003



Level Duty Cycle (DC2)DC

18.0mm

80%88ms

20%22ms

T2(Tlevel)

147mm

Level Duty Cycle (D2)



measuring range of -40 °C



measuring range of 160 °C



measuring range of 20.9 mm



measuring range of 65.9 mm

Temperature Duty Cycle (DC1)DC

-40ºC

80%88ms

20%22ms

T1(TTemp)

+160ºC

Temperature Duty Cycle (D1)

All the calculation data only apply for standard motor oil on

account of the dependence between ultrasonic speed and density

of the medium. Consequently, the above calculation only works

for standard motor oils (e.g. Castrol 10W30). In the case of other

measurable non-conductive media, the calculation must be

checked in the respective application.

Temperature evaluation (T1 Temp)

Oil filling level evaluation (T2 level)

Basic information about the signal duration

Level (mm) = [(T2(T-0.2) x 75 + 15.56] x + 5.34T

110

Hella I 17

Notes

18 I Hella

Notes

Hella I 19

© Hella KGaA Hueck & Co., Lippstadt

Hella KGaA Hueck & Co.

Rixbecker Straße 75

D-59552 Lippstadt/Germany

Telefon + 49 29 41 38-3 11 74

Telefax + 49 29 41 38-4 73 11 74

www.hella.com/electric-electronics-components

E-Mail: [email protected]

Documents

Oil level sensors - hella.com · What can you expect? This is the “oil level sensors” section of the overall “Hella sensors and actuators” catalogue. The sensors can be used