Level sensor for vehicles – maximum precision and reliability
PRODUCT FEATURES
Application
Vehicle level sensors or ride height sensors detect the vertical position of the body relative to the axle or chassis and are an essential component of modern chassis, headlamp levelling and driver assistance systems. They are used in countless vehicle variants, both in passenger cars and also in commercial vehicles, regardless of whether the vehicle has a combustion engine or an electric one.
Design and function
The vehicle level sensor is a precise electronic component that detects the vertical position of the vehicle body relative to the axle or chassis. Its design typically consists of a robust housing to protect the integrated electronics, a lever arm with a ball joint for mechanical connection and also a sensor element that converts the movement of the lever arm into electrical signals. In practice, potentiometer, Hall or inductive sensors are usually used for this purpose.
The functioning of the sensor is based on the detection of changes in height caused by uneven road surfaces, loads or dynamic driving conditions. These changes are recognised in real time and transmitted as electrical signals to a higher-level control unit. Depending on the version, various output signals are possible, for example analogue, PWM, SENT, CAN or LIN. The data collected is used, among other things, to control chassis systems such as air suspension and also automatic headlamp levelling, thus making a significant contribution to safety and comfort.
TECHNICAL DETAILS
| Operating voltage | 4 – 11 V |
| Temperature measuring range | - 40 °C to +125 °C |
| Output signal | Analogue, PWM, SENT, PSI 5 |
| Resolution | 12 bit |
Product: 6PM 012 699-511
PROGRAM OVERVIEW
1 What is the task of a vehicle level sensor?
The level sensor measures the vertical position of the body in relation to the axle or chassis, usually via a lever mechanism with a potentiometer, Hall or inductive sensor. The recorded data is transmitted to control units and serves as the basis for systems such as automatic headlamp levelling, adaptive damper control, air suspension and level control and also ESP and roll stabilisation. In this way, the sensor makes an important contribution to safety and driving comfort.
2 What are the main advantages of the HELLA level sensor?
The level sensor from HELLA impresses with its precise measurements thanks to the patented CIPOS® technology, which is contactless, wear-free and highly accurate. Its robust and compact design makes it resistant to vibrations, temperature fluctuations and moisture, ensuring a high level of functional reliability and safety even under extreme conditions.
3 For which vehicles is the sensor relevant?
The level sensor is relevant for vehicles with xenon or LED lamps where automatic headlamp levelling is required by law, and also for vehicles with active chassis, air suspension or adaptive damping. It is used in various vehicle models and supports the respective comfort and safety systems in operation in each type of vehicle.
4 What are the typical causes of failure?
Workshops often encounter defects in level sensors because of interrupted connection cables, internal short circuits that cause faulty signals, and also because of mechanical damage brought about by, for example, stones, accidents or chassis repairs. Corrosion caused by moisture and road salt is also a typical cause of failure.
5 What happens when you drive with a defective vehicle level sensor?
A defective sensor can lead to incorrect controlling of the chassis and stability systems. The result: reduced driving comfort, unsafe driving behaviour or malfunctions in the headlamp levelling system. A quick diagnosis and sensor replacement are therefore important.
6 Why should wholesalers have HELLA vehicle level sensors on offer?
HELLA offers a constantly growing portfolio of level sensors for many popular vehicle brands so that wholesalers can stock their warehouses in line with requirements. The broad vehicle coverage and the increasing number of vehicles with LED or xenon lamps and with active chassis also open up strong market opportunities in the aftermarket.