Portable Seismograph

Application
Traditional seismic prospecting and earthquake prediction systems in seismic stations;
Quality inspection of civil engineering;
Measurement of long-time ground micro-vibration; Monitoring explosion vibration.

Specification

Volume	φ140×170mm
Weight	3kg
Color	Yellow, red etc.
Waterproof depth	1m
Channel	3 for velocity geophone
Continuous operation duration	>20 days
Geophone frequency bandwidth	0.2 Hz ~ 200 Hz
Dynamic range	> 120 dB
Amplitude consistency between channels	＜5%
Phrase consistency between channels	＜0.1ms
Crosstalk suppression between channels	＞100db
Lateral vibration suppression	Better than 0.1%
Self-noise	Below NHNM curve; below NLNM curve when 5s~1Hz
Power consumption	0.2w
External powe supply	5v~12v, chargeable
Sampling rate	1000, 500, 250, 100, 50 sps
Internal high accuracy clock	OCXO, 0.5 PPM@4℃
Storage capacity	32 GB (64GB extendable)
Data format	Miniseed (SAC, SEGY etc. convertible)
Setting	Bluetooth, USB and RS232 serial interface
Data transmission	USB 2.0

Feature
With a case made of high-quality alloy, the main unit is structurally firm, light weighted, waterproof and anti-interference.
With a low-noise design, the system noise is less than 3μV.
The data can be safely and reliably stored in a removable TF card.
Remote control and real-time data transmission can be conducted via wired and wireless network.
Besides internal electronic compass, the chargeable lithium battery allows continuous operation of over 20 days.
The optional external single 5V power supply make the seismograph more suitable for long-time unmanned seismic observation in the wild.