DoReMi

The DoReMi seismograph is a fully modular multichannel seismograph with digital telemetry. It is an innovative instrument which distributes along the cable all the electronics needed to record a seismic signal.

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Datasheet

Product information:

Key Features

Each channel itself is a seismograph that linked to the other elements and creates a network
Fully modular system provides flexibility
Lightweight and durable battery
Most of the electro-magnetic environmental noise is eliminated
No signal loss or crosstalk can happen along the string
Able to run a wide range of surveys using seismic sources or just ambient noise
User friendly
Fully independent channels allows adding cable extensions, replacing channels without the need to change the entire cable and sharing channels with partners

Applications

Seismic survey
Geophysical active exploration techniques (MASW, Refraction, Reflexion, Downhole)
Geophysical passive techniques (ReMi, ESAC/SPAC)

Technical specifications

Parameter	16 Bits (96dB dynamic range)	24 Bits (144dB dynamic range)
A/D Converter Type	SAR	SIGMA DELTA
Converter Input Span	5 V	5 V
S/N Ratio @ 500 SPS	96 dB (@ 27dB gain)	140 dB
S/N Ratio @ 5000 SPS	94 dB (@ 27dB gain)	130 dB
S/N Ratio @ 20000 SPS	92 dB (@ 27dB gain)	105 dB
Input Type	for geophone	for geophones
Input impedance	> 100 kΩ	> 20 kΩ
Common Mode Rejection	> 80 dB	> 80 dB
Band pass	2–200 Hz	DC–400 Hz
Max Sampling Lag Between Ch.	< 30 ppm	< 30 ppm
Max Error Between Trigger Ch.	< 0.2 µs	< 0.2 µs
Memory per channel	64000 bytes	128000 bytes
Maximum Samples	30000	40000
Sampling Rates	200 Hz to 50000 Hz	200 Hz to 20000 Hz
Maximum Connectable Channels	255	255
Power Consumption	≈ 0.3 W per Ch.	≈ 0.3 W per Ch.
Instrument Chain Max Length	1000 m	1000 m