Multipurpose seismic data logger NDAS-8426N
The NDAS-8426N multipurpose seismic data logger is designed to acquire and transfer high quality data in seismic networks and store data on a local drive.
The model provides a 24-bit synchronized data registration via 6 channels and is well suited for connecting analog instruments by various manufacturers.
Along with analog instruments, there is an option to connect digital seismometers and digital accelerometers made by R-sensors. The data are stored in a file on a local memory card as well as on external USB drives in the miniSEED, binary and text formats.
The SeedLink protocol is used for telemetry.
The system is clocked with a high precision quartz that is being corrected with the use of external sources of GPS/GLONASS accurate time signals as well as via Ethernet over NTP and PTP protocols.
The data logger has 4 auxilliary channels as well as alarm relays to control external devices.
Additional instruments are possible to connect.
Characteristics Delivery and warranty
| Availability | to order |
| Dynamic range | 132 dB at 100 sps |
| Supply voltage | 12 - 48 V (7.5 - 60 V permissible) |
| Power consumption | 1.2 W excluding sensors, Wi-Fi, 3G, Ethernet; 1.8 W typical average |
| Temperature range | -20...+85°C - standard SD-card |
| Number of channels | 6 |
| Gain coefficients | 1, 2, 4, 8, 12 |
| ADC sampling rate | 1, 10, 50, 100, 125, 250, 500, 1000, 2000, 4000, 8000 Hz |
| ADC resolution | 24 bit |
| Reference generator stability | 0.5 ppm |
| Data recording mode | continuous, schedule |
| Data recording format | binary, ASCII, miniSEED |
| Data storage | microSD 32 GB |
| Data transfer | SeedLink over Ethernet |
| Inbuilt sensors for device health monitoring | temperature, humidity |
| Case connectors | 7-pin type for RS-485 power and interface; 10-pin type for inputs of main ADC for calibration and sensors power (2 pcs); inputs of auxilliary ADC and outputs of signal relay (1 pc); micro USB-B for data reading and configuration; RJ-45 type for Ethernet; USB-A for connecting external drives and CME-ND digital sensors; SMA-F type for GPS / Wi-Fi / 3G / 4G / LTE antennas |
| Delivery set | 1.5 m USB type A/B standard cable, 3 m active GPS antenna, Wi-Fi SMA antenna (option), microSD 32 GB, User manual |
| GNSS timing accuracy | < 10 µs |
| GNSS receiver | GPS / GLONASS |
| Auxiliary ADC | 12 bit, 4 single-ended or 2 differential channels, 0.1, 1.0, 4.0 sps |
| Additional network options | Power over Ethernet, up to 24 ADC channels, low power version, RS-485 wired interface to connect external sensors |
| Case material | Aluminum alloy, IP-65 waterproof |
| Dimensions | 225 х 190 х 82 mm including connectors |
| Weight | 1.8 kg |