Level sensors (Generation 4)

Electrics and ElectronicsSensors & actuators

Making sure the (oil) level is always right: The latest generation of HELLA level sensors ensure that the liquid level is accurately recorded so that appropriate action can be taken if the level is too high or too low. For this reason, level sensors are particularly important for detecting oil level.

 

Oil level sensors continuously measure the oil level in the static and mechanical ranges and supply this data accordingly. In this way, expensive engine damage, for example due to a break in the oil film, can be effectively avoided. In addition to the oil level, the integrated temperature sensor can contribute an input variable for the engine’s thermal management.

 

Compared to sensors with many different electronic components, HELLA PULS (packed ultrasonic level sensor) oil level sensors are particularly resistant to shocks and vibrations. This is ensured by the individual multi-chip module, on which ultrasonic and temperature sensors as well as an ASIC (application integrated circuit) are integrated. HELLA oil level sensors are flush mounted vertically from below in the bottom of the oil pan.

Product Advantages

  • Fourth-generation level sensors: Reworked design and function
  • Especially high resistance to environmental influences
  • Continual measurement of the engine oil level in the static and dynamic range

Technical Data

Operating voltage (for oil level measurement) 9 – 16 V

Operating voltage (for temperature measurement)

9 – 16 V

Polarity reversal voltage

-14 V / 60 s
Overvoltage 15 s at 28 V; 250 ms at 32 V

Measuring range (static and dynamic)

13 mm to L -6 mm1)

Operating temperature

-40 °C to +160 °C

Operating temperature (for oil level measurement)1)

-10 °C to +150 °C

Re-heating temperature

Max. 5,700 h at 125 °C;
max. 240 h at 145 °C;
max. 60 h at 160 °C

Storage temperature

-40 °C to +150 °C

Current consumption 8 mA
Max. current consumption during measurement 50 mA
Report2) PWM
Protection class IP 6K9K
Weight Variant-dependent
Viscosities 1 mm2/s to 1,300 mm2/s

 

 

1) Depending on damping cup length (see variant overview) 

2) Level output above -10 °C. At temperatures below -10 °C,

an “empty” signal is sent (18 mm) together with the diagnostic signal “Out of tolerance”.

Program Overview

VariantMeasuring rangePart numberPackaging unit
Length of damping cup 85 mmStatic and dynamic 13 – 79 mmAvailable upon request1
Length of damping cup 95 mmStatic and dynamic 13 – 89 mmAvailable upon request1
Length of damping cup 109.8 mmStatic and dynamic 13 – 103.8 mmAvailable upon request1
Length of damping cup 135 mmStatic and dynamic 13 – 129 mmAvailable upon request1
Length of damping cup 150 mm

Static and dynamic 13 – 144 mm

Available upon request

1

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