geophysical technology inc.

NuSeis NRU 1C

The NRU™ is a self-contained seismic nodal recording unit with a 58 gram internal eCab (electronic cab) that can be quickly removed and inserted into a dozen different interchangeable NuSeis formfactors, each optimally suited for particular environments to provide peak operating performance, and the highest quality ground coupling. The unit has a strong and durable two-piece, water proof Lexan externally assembly with locking rings that enclose the internal battery and geophone. All the NuSeis transformer formfactors have the same upper Lexan dome with four stainless steel MIM protrusions for data download and power recharge.

Product Features

• All in one device – geophone, electronics and battery

• Formfactor options for all environments

• GNSS/GPS including GPS, GLONASS, GALILEO, BEIDOU

• Raw GNSS data recording enables DGPS post processing of node location

• High Speed USB data download

• EarthGrip ground coupling providing superior data quality

• Highly visible LED status indicators

• 10 Ah Li-ion battery
• Bluetooth 5.1™ continuous broadcast of 20 Health&Status metrics
• High sensitivity geophone (5 Hz, 10 Hz or any other customer choice)
• Optional KCK connector lower end housing – enables external geophone/hydrophone
• System Dynamic Range: 148dB
• 8 GB standard (expandable to 16, 32, or 64 GB)

 

Specifications

Seismic Data Channel	1C
ADC Resolution	24 bit Sigma Delta
Sample Interval	0.25ms, 0.5ms, 1ms, 2ms, 4ms
Preamplifier Gain	Programmable 0dB to 42dB in 6dB steps
Antialias Filter	206.5Hz @2ms, 413 Hz @1ms Linear phase or minimum phase
Low Cut Filter	None
Operating Temperature Range	-40C to +75C
Operational Autonomy	NRU Lite 18 days (12 Hours per day) NRU KCK 46 days (12 Hours per day) NRU 1C 46 days (12 Hours per day) NRU Flighted 48 days (12 Hours per day) NRU D3 92 days (12 Hours per day) NRU EL 92 days (12 Hours per day) NRU UFO 80 days @ -30C (12 Hours per day) NRU SL BASE 48 days (12 Hours per day)
Weight	NRU Lite 400 gr NRU KCK 530 gr NRU 1C 600 gr NRU Flighted 620 gr NRU D3 860 gr NRU EL 860 gr NRU UFO 1600 gr NRU SL BASE 1800 gr
Dimensions	NRU Lite – Max 45 mm tube, 199 mm long NRU KCK – Max 53.5 mm tube, 209 mm long NRU 1C – Max 53.5 mm tube, 209 mm long NRU Flighted – Max 58 mm tube, 209 mm long NRU D3  NRU EL  Max 53.5 mm tube, 218 mm long NRU UFO  NRU SL BASE
Battery	13.4Ah Li-Ion Charge Temperature Range: 0°C ~ +45°C Cycle Life:>500 cycles to 80%
Acquisition Channel	@2ms sample interval, 25°C, 31.25 Hz Maximum input signal: 1768 mVrms @0dB Total Harmonic Distortion: 0.0001% @31.25Hz Instantaneous Dynamic Range: 127dB @2ms System Dynamic Range: 148dB Equivalent Input Noise: 1500 nV @0dB 400 nV @12dB 160 nV @24dB Gain Accuracy: 0.25% unit to unit Input Impedance: 100k Ohm Timing Accuracy: +/- 12.5µsec customizable at client request
Instrument Test	Internal Noise, Total Harmonic Distortion, Impulse Response
Sensor Test	Resistance, Impedance, Noise
Sensor	Internal, Single Geophone 5Hz or 10 Hz +/- 3.5% 85.8 V/m/s +/- 3.5% Other geophones available upon request
Memory	8 GB standard (expandable to 16, 32, or 64 GB)