MARWIS 2.0 with additional temperature humidity sensor

The New World of MARWIS

Not only got the Lufft Blog a new design, but also the mobile road weather sensor has been upgraded. What’s the difference between the first and the new MARWIS version? How does the MARWIS friction measurement differ from grip testers? And how do customers mount MARWIS on small transporters?

From the Lufft Development: MARWIS 2.0

Since Intertraffic 2016 the new MARWIS (2.0) is available. But where’s the difference between the first and the new version? If you take a closer look, there has been included a small new part in the MARWIS case.

This new component isn’t a new case design, but it’s an additional probe determining ambient temperature. In the first MARWIS model has only been included a temperature humidity sensor detecting these values at the surface. The second ambient temperature sensors now complements the surface temperature sensor perfectly and increases the measurement spectrum by ambient temperature and ambient humidity. Through this upgrade, MARWIS has evolved from a pure ground sensor to a mobile weather station.

Besides, our engineers took the chance to improve the firmware further: The new firmware version will come with an optimized water film height algorithm, improved ice percentage measurement and an optimized heating performance at 12 V.

From the Airport: Grip Testers

There are still some more frequently asked questions about the mobile road sensor. One of them is how MARWIS’ friction detection differs from grip tester devices. Grip testers are mechanical measurement devices which are able to issue the grip of different runway surfaces. They are attached to a trailer hitch and are directly drawn over the ground and are mostly used at airports. In the following table, I summed up the, in my opinion, most significant differences between the two measurement instruments (MARWIS and grip testers):

comparison table
Comparison between MARWIS and grip tester

From Weilheim: Sophisticated Automatic Positioning Fixture

Not only the Lufft engineers come up with new MARWIS equipment but also our customers have brilliant ideas. The public utility in Weilheim, Germany sent us a video of an outstanding installation example: They developed an MARWIS positioning fixture with which they are able to drive the MARWIS into and out of the transporter tarpaulin automatically. Thus, the sensor can be put back into a save place after a measurement tour. In the following videos you can see, how smart this construction is:

If you are looking for further information and product details, I recommend you to take a look on the following linked websites or to contact us.

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