Althen Compact Design, High Accuracy, Low Cost Linear Inductive Displacement Sensors
2023-07-13 08:21:35, Althen GmbH Mess- und SensortechnikAlthen's sales and development go hand in hand with in-house production to create customer-specific system solutions. We test the functionality of all our products in our calibration laboratory. Careful control of in-house development and sales of our products has given Althen a special position in the German market for measurement technology and sensors.Althen was one of the first companies in the industry to be certified according to DIN EN ISO 9001:2015.
Linear Inductive Displacement Sensors
The LIPS S114 inductive displacement sensor provides users with a highly accurate, low-cost sensor derived from the P101 version, developed for applications where the sensor is fully immersed during normal operation, and which has a compact design for use at pressures up to 10 bar. The output signal of the sensor is proportional (similar to a potentiometer) to the mechanical displacement to be measured and the supply voltage (proportional operation). The signal range is 0.5-4.5 volts at an operating voltage of 5 V. In contrast to many digital encoders, the signal is provided as an analogue absolute value immediately after commissioning.
The sensors are very robust and the housing and actuator are made of stainless steel to ensure a long service life and good resistance. In the standard version, the removable pushrod is provided with a threaded hole M5, the encoder housing is clamped, the screwed-in spherical rod end M5 (for housing and pushrod) and then the cable outlet is transverse and the sensor is sealed according to IP68-10 bar.
Product features
Compact and self-contained
Travelling set-up according to customer requirements
High durability and reliability
High accuracy and stability
Sealed to IP68-10bar
Non-contact sensing technology to eliminate wear and tear
Technical Parameters
Measuring range: up to 800mm
Independent linearity: ± 0.25% to ± 0.5%
Frequency response: 300hz (-3dB)
Sealing: IP68 10 bar, 100 MW, 145 psi
Application Scenarios
Displacement transducer for maintenance of Noordersluis
The old IJmuiden lock is the gateway to Amsterdam: with it, ships can now sail directly into the harbour of the Dutch capital. But even such a steel giant is too small for the growing number of sea and cruise ships. In order to continue to ensure safety and productivity, today, 85 years later, it will be modernised and expanded.
At the time of its opening in 1927, the Noordersluis (North Locks), at 400 metres long, 50 metres wide and 15 metres deep, was still one of the largest locks of its kind, surpassing even the previous Panama Canal world record holder.In 2029, the lock will be replaced by a huge new structure, 500 metres long, 70 metres wide and 18 metres deep.
Plug-and-play measurement system for ship locks
Althen was asked to help measure rail suspension and delivered a complete measurement system just two weeks after the initial contact.Divers installed 20 linear position sensors on the rails (10 sensors per rail).The S114 linear position sensors are robust, very accurate and particularly suitable for underwater use. The system measures the strength of the track movement when opening and closing the sluice gate. The combined measurements are recorded in the GL 7000 data logger. Thanks to the plug-and-play concept, the system is ready for use half an hour after installation.
Deployment of the measurement system
The 20 position sensors are connected to the GL 7000 data logger with 100 metres of cable via a specially developed junction box from Althen. Measurement data can be monitored in real time on the data logger's display. Measurements can be stored in real time, exported or read remotely.
After two weeks, the collected measurement data was sent to TNO (The Netherlands Organisation for Applied Natural Science Research). They analysed the data and prepared a report for Rijkswaterstaat. Based on this report, SPIE developed a detailed maintenance plan for Noordersluis.
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