When the LE-3D was introduced more than 30 years ago, Lennartz Electronic has set a new standard for short period seismometers regarding uniformity and handiness. Until today, our sensors rest upon the same basic principle and are still among the best-selling seismometers.
Lennartz sensors do not need any kind of transportation locking nor do they require excessive settling time or elaborate thermal shielding. A useful signal is present seconds after power-up. All sensors are exactly calibrated with the utmost diligence and have identical characteristics.
LE-3Dlite MkIII: the seismometer that started it all; evolved out of LE-3D classic. Introduced in 1986 and continuously optimized. The current version MkIII (since 2014) further improves on the already impressive features of its predecessors: Even less noise, even less power dissipation, increased sensitivity.
LE-1D/V MkIII: the single-component (vertical) version of the LE-3Dlite.
LE-3D/5s MkIII: three components, 5 sec corner period. Extremely low self noise, yet rugged and fieldworthy. The instrument of choice for H/V measurements.
LE-3D/20s: three components, 20 sec corner period. Longer periods but still portable.
LE-3D/BH: the downhole version of LE-3Dlite
LE-3D/BHs: the simplified version of the above, for installation in sand.