NEUBRESCOPE NBX-7031
Made to order products
The NBX-7035 is available as a standard product in the NBX-7000 series.
The NBX-7031 will be available as a made-to-order product for the time being.
Features
- Hybrid measurement using TW-COTDR (Rayleigh) and PPP-BOTDA (Brillouin)
- Maximum measured distance 27km
- Maximum spatial resolution 2cm
- Double-ended
NBX-7000 Series Lineup Comparison
| Model | Rayleigh | Brillouin | Minimum Readout Resolution | Highest Spatial Resolution | Maximum Measurement Distance | Dimensions |
|---|---|---|---|---|---|---|
| NBX-7035 | TW-COTDR | PSP-BOTDR (single-ended) | 5 cm | 5 cm | 80 km | 450×658×295 mm / 35 kg |
| NBX-7031U | TW-COTDR | PPP-BOTDA (double-ended) | 2.5 cm | 2.5 cm | 80 km | 450×658×295 mm / 35 kg |
| NBX-7031 *Custom model |
TW-COTDR | PPP-BOTDA (double-ended) | 1 cm | 2 cm | 27 km | 456×485×286 mm / 30 kg |
Specification
| Main Features | Temperature and strain can be measured separately using a single optical fiber sensor cable. PPP-BOTDA / BOTDR / TW-COTDR / COTDR |
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| Function | PPP-BOTDA | TW-COTDR | |||||||||||
| Laser wavelength | 1550±2 nm | 1556 nm～ 1558 nm | |||||||||||
| Distance range | 50m ～ 27km | ||||||||||||
| Measurement frequency range | 9～13 GHz | 192000～193000 GHz | |||||||||||
| Range of strain measurements | -30,000 ～ +40,000 με (-3% ～ +4%) |
-3,000 ～ +4,000 με (-0.3% ～ +0.4%) |
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| Measurement Frequency Scan Step | 1, 2, 5, 10, 20, 50MHz | 1, 2, 5, 10, 20, 50, 100, 200 MHz | |||||||||||
| Readout Resolution | 5 cm (default), 1 cm (minimum) | ||||||||||||
| Sampling Points | 600,000 (default), 3,000,000 (maximum) | ||||||||||||
| Average Count Settings | 2^5～2^23 times (including Hardware Average Count 2^5~2^16 times) | ||||||||||||
| Function | PPP-BOTDA | TW-COTDR | |||||||||||
| Pulse width (ns) | 0.2 | 0.5 | 1 | 2 | 5 | 10 | 0.2 | 0.5 | 1 | 2 | 5 | 10 | |
| Spatial Resolution (cm) | 2 | 5 | 10 | 20 | 50 | 100 | 2 | 5 | 10 | 20 | 50 | 100 | |
| Dynamic Range(dB)*1 | 0.5 | 1 | 1.5 | 3 | 3.5 | 6 | 0.5 | 1 | 3 | 6 | 8 | 10 | |
| Max. Measurement Distance(km)*2 | 0.5 | 1 | 2 | 5 | 10 | 18 | 0.5 | 1 | 10 | 20 | 22 | 25 | |
| Optical Budget(dB)*1*8 | 1 | 2 | 5 | 7 | 10 | 12 | 1 | 2 | 5 | 7 | 10 | 13 | |
| Measurement Accuracy(1σ)*3*4 | 15με / 0.75℃ | 7.5με / 0.35℃ | 5με / 0.25℃ | 20nε / 0.001℃ | |||||||||
| Repeatability(1σ)*3*4*5 | 10με / 0.5℃ | 2.4με/ 0.1 ℃ | 2με/ 0.1 ℃ | 10nε/ 0.0005 ℃ | |||||||||
| Measurement time*6*7 | 5 seconds（minimum） | 10 seconds（minimum） | |||||||||||
| Measurement accuracy for hybrid mode |
10με/ 0.5 ℃ | ||||||||||||
| Repeatability for hybrid mode |
5με/ 0.25 ℃ | ||||||||||||
| Input-output fIber | Single mode optical fiber | ||||||||||||
| Fiber Connector | FC-APC (default) / SC-APC (factory option) | ||||||||||||
| Power Supply | AC100～240V 50/60Hz 250VA | ||||||||||||
| Laser Class | Class 1 (IEC60825-1: 2001) | ||||||||||||
| Dimensions / Weight | approx. 456(W)×485(D)×286(H) mm / 30 kg | ||||||||||||
| Operating Temperature | 10～40℃, Humidity below 85% (no dew condensation) | ||||||||||||
| Storage Temperature | 0～50℃ | ||||||||||||
| Interface | USB 2.0 x2, USB 3.0 x2, LAN x2, HDMI x1 | ||||||||||||
| Place of Production | Japan | ||||||||||||
| Updated：2026/03/05 | |||||||||||||
| *1 | Based on 2^15 average cycles |
| *2 | Based on average fiber loss of 0.3dB/km using SM fiber (UV type) |
| *3 | Based on the measurement of strain free SM fiber (UV type) |
| *4 | Based on the measurement of strain-free SM fiber (UV type) and in constant temperature environment |
| *5 | The maximum deviation range of measurement value for 5 consecutive measurements for 100 consecutive points |
| *6 | Within the setting of 50m range, 2^13 count settings, 41scan steps except the time of Pre-Pump Adjustment (for BOTDR and PPP-BOTDA) |
| *7 | Within the setting of 50m range, 2^10 count settings, 401scan steps except the time of Pulse Output Adjustment (for TW-COTDR) |
| *8 | Within the allowable range being adjusted by the optical power, except the case of nonlinear phenomena |
| *1-*5 are based on a frequency scan step of 5MHz when using PPP-BOTDA and with Pre-Pump Adjustment and Auto Frequency Adjustment on | |
| *1-*5 are based on a frequency scan step of 250MHz by using TW-COTDR and with Pre-Pump Adjustment and Auto Frequency Adjustment on | |
