“PLEASE, BY ALL MEANS RESIST THE TEMPTATION OF OPENING THE SENSOR!
As we have stated previously, there are (very literally!) no user serviceable parts inside, and you will only make things worse. Once the sensor has been opened, the average user is unable to reseal the sensor properly.”
That is from page 23 of the Lennartz 3d-Lite manual. I don’t know about you but for me that is like waving a red cape in front of a Murcia bull. What could possibly be inside, what wonders beyond the average person lie in waiting? We just had to find out.
So here it goes: What’s Inside a Lennartz 3D-Lite?:
For many years, the Lennartz 3d-Lite has been the gold standard in electronically extending the period of geophones. You can see the patent here: https://register.dpma.de/DPMAregister/pat/PatSchrifteneinsicht?docId=DE3307575A1. Yes it is in German and it is expired. Dave Nelson (the fellow in the first photo) has designed a circuit for OSOP based on the Lippmann patent that is the basis of our Sixaola and Darien sensors.
So there you have it, that’s what is inside a Lennartz 3D-Lite.