The 1 Hz to 100 Hz passband, low-power, low-noise, extremely rugged and compact "workhorse" seismometers for applications requiring short-period sensitivity, fieldworthiness, and utmost portability.
A 3D (left) and a 1D vertical (right) version are available. With several thousand channels in daily use all over the world, LE-3Dlite has evolved into a trustworthy short-period standard. Since its inception in the late 1980s, continuous and careful updates and improvements have kept it the field worker's favorite instrument for rapid deployment as well as for demanding long-term observations.
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The most important characteristics:
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LE-3Dlite MkIII |
LE-1DV MkIII |
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Eigenperiod |
1 second |
1 second |
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Upper frequency limit |
100 Hz |
100 Hz |
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Transduction factor |
800 V/m/s (differential) |
800 V/m/s (differential) |
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Output signal |
3 analog voltages, max. +- 7V |
1 analog voltage, max. +- 7V |
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Power supply |
+10 ... +16V DC, typically 6.5 mA @12 V |
+10 ... +16V DC, typically 2.6 mA @12 V |
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Dimensions |
95 mm diameter, 65 mm height (excluding eyebolt) |
85 mm diameter, 55 mm height (excluding eyebolt) |
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Weight |
1.6 kg |
1.1 kg |
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Temperature range |
-15 ... +60 °C |
-15 ... +60 °C |
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RMS noise @ 1 Hz |
< 3 nm/s |
< 3 nm/s |
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Dynamic range |
> 136 dB |
> 136 dB |
