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DoReMi - The cable seismograph
This innovative
seismograph embeds and distributes a modular seismograph
with a one-to-one channel scalability all
along the cable. This is an electronically comprehensive seismograph.
It is a light, practical and very high performance device:
- Ideal solution
for MASW, ReMi, Refraction, etc.
- 127dB of dynamic range at all available sampling frequencies
- high noise immunity
- 64k bytes memory (30k samples)
- sampling from 5 millisecond (slow) up to 50 microseconds (FAST)
- up to 255 channels per string
- 127dB of dynamic range at all available sampling frequencies
- high noise immunity
- 64k bytes memory (30k samples)
- sampling from 5 millisecond (slow) up to 50 microseconds (FAST)
- up to 255 channels per string
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a chain of elements, a refraction screenshot, the main interface
Here a couple of videos taken during one of our test sessions.
The DoReMi was connected to a palm device Acer N300.
(We apologise for the low quality of the video. It was made on the fly during a survey test on the field. We will post better images as soon as possible)
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Due to its exceptional low noise at low frequency, our SADC20 a/d converter (originally designed for weak motions -i.e. micro-earthquakes- recordings) is particularly suitable for geophysical investigation, such as soil characterization surveys according to the Nakamura methodology.
Sensors recommended for this applications are the HS-1 2Hz. They can be either embedded in the instrument, using the HS1PACK, or external using the SS-20. A cheaper solution is the use of either 4.5Hz internal geophones, using the GS11DPACK, or the external seismic unit SS-45.
Although the SR04 is optimized for electrodynamic sensors (velocimeters) it can be used also with thirdy parties sensors such as Gur__p, Kine__s, Nano__cs or Lenn__z.
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With the same high quality signal of the SR04, the SL07 is capable to record on SD/MMCX flash memory cards.
It can be used together with sensors of many kinds and gives excellent results on Nakamura's method surveys. Sensors recommended for this applications are the HS-1 2Hz. They can be either embedded in the instrument, using the HS1PACK, or external using the SS-20. A cheaper alternative is the use of 4.5Hz internal geophones, using the GS11DPACK or the external triaxial unit SS-45.
Although the SR04 is optimized for electrodynamic sensors (velocimeters) it can be used also with thirdy parties sensors such as Gur__p, Kine__s, Nano__cs or Lenn__z.
Due to its very low power consumption (only 1.5W), the SL07 seismic unit can be used also in remote istallations with a small external battery.
triaxial 4.5Hz sensor package to be embedded in SR04C3 and SL07C3 recorderds/digitizers
triaxial 2.0Hz sensor package to be embedded in SR04C3 and SL07C3 recorderds/digitizers
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Sensor with 2Hz eigenfrequency, high sensitivity, aluminum box with levellable tripod and bull's eye level. This is the ideal sensor to combine with the SR04 and/or SL07 instruments. You can easily monitor earthquakes, volcanos, landslides, structures, etc...
Signal cables always included with the unit
SS-45
Sensor with 4.5Hz eigenfrequency, high sensitivity, aluminum box with levellable tripod and bull's eye level. This is the ideal sensor to combine with the SR04 and/or SL07 instruments. You can easily monitor earthquakes, volcanos, landslides, structures, etc...
It is a small sensor with an exceptional quality/price ratio.
Signal cables always included with the unit
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Borehole triaxial sensor. Customizable with 3 or 5 sensitivity axis.
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Electrodynamic velocimeter cartridge of 4.5Hz eigenfrequency available in vertical and horizontal sensitivity.
Land Case Geophone of 4.5Hz eigenfrequency available in vertical and horizontal version. Split spring connector and available upon request.
The yellow takeout is in reality an element of the DoReMi, it is a single channel digitizer and it is not sold with the geophone.
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Geospace sensor with eigenfrequency of 1Hz available as vertical or horizontal. It is a good alternative and even better than classic sensors on the market since many years due to its high reliability in extreme environemental conditions.
Connecting cable to our digitizer included with the sensor.
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Three orthogonally assembled GS1 ina single canister equipped with levelling device.
Connecting cable to our digitizer included with the sensor.
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Power supply and stabilized battery charger with 110-240Vac Input and 13.8Vdc 3A (max) output.
Suitable to keep lead-acid battery charge on proper level at remote places. Light and reliable it can supply loads up to 3A. Not intended to work for solar panels.
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SHOTPLATE
Aluminum shot plate with anchor coard. To be used with the DoReMi system.
Diameter 18cm, thickness 4 cm, weight 2kg