NEUBRESCOPE NBX-7035

Latest Flagship Model

Released in August 2025 as the successor to the NBX-7031, this model features enhanced measurement capabilities and long-term reliability to meet the needs of the field.

News Release

Features

Hybrid measurement using TW-COTDR (Rayleigh) and PSP-BOTDR (Brillouin)
Maximum measurement distance: 80km
Maximum spatial resolution: 5cm
Single-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.
TW-COTDR / PSP-BOTDR / BOTDR

Function

TW-COTDR

Laser wavelength

1551 nm～ 1561 nm

Distance range

50 m ～ 80 km

Measurement frequency range

191,973.335～192,973.335 GHz

Range of strain measurements

-5,000 ～ +5,000 με (-0.5% ～ +0.5%)

Measurement frequency scan step

4 MHz ～ 500 MHz (5 MHz step)

Readout resolution

5 cm, 10 cm, 20 cm

Sampling points

500,000 (default)

Average count settings

2^5～2^23 times (including Hardware Average Count 2^5～2^16）

Function

TW-COTDR

Pulse width

0.5 ns

1 ns

2 ns

5 ns

10 ns

Spatial resolution

5 cm

10 cm

20 cm

50 cm

100 cm

Dynamic range^*1

2 dB

5 dB

8 dB

12 dB

15 dB

Max. measurement distance^*2

10 km

25 km

40 km

60 km

75 km

Optical budget^*1*8

4 dB

7 dB

10 dB

14 dB

17 dB

Measurement accuracy^*3*4*5*6*7

20 nε/ 0.001 ℃

Short time repeatability^*3*4*5*6*7

10 nε/ 0.0005 ℃

Long time repeatability^*3*4*5*6*7

20 nε/ 0.001 ℃

Measurement time^*6*7

10 seconds (minimum)

Measurement accuracy
for hybrid mode ^*9

4 με/ 0.25 ℃

Repeatability
for hybrid mode ^*9

4 με/ 0.25 ℃

Input-output fiber

Single mode optical fiber

Fiber connector

FC-APC (default) / SC-APC (factory option)

Suitable fiber

Single mode optical fiber

Power supply

AC100～240V 50/60Hz 350VA

Laser class

Class 1 (IEC60825-1: 2001)

Dimensions / Weight

approx. 450(W)×658(D)×295(H) mm / 35 kg

Operating temperature

10~40℃, Humidity below 85% (no dew condensation)

Storage temperature

0～50℃

Place of production

Japan

Function

PSP-BOTDR

BOTDR

Laser wavelength

1550±2 nm

Distance range

50 m ～ 10 km, 20 km, 40 km, 80 km

Measurement frequency range

9～13 GHz, 1 GHz/time

Range of strain measurements

-4,000 ～ +4,000 με (-0.4% ～ +0.4%)

-30,000 ～ +40,000 με (-3% ～ +4%)

Measurement frequency scan step

4, 8, 16 MHz

4 MHz ～ 50 MHz

Readout resolution

5 cm, 10 cm, 20 cm

Sampling points

500,000 (default)

Average count settings

2^5～2^23 times (including Hardware Average Count 2^5-2^16）

Function

PSP-BOTDR

BOTDR

Pulse width

1 ns

2 ns

5 ns

10 ns

5 ns

10 ns

20 ns

50 ns

Spatial resolution

10 cm

20 cm

50 cm

100 cm

0.5 m

1 m

2 m

5 m

Dynamic range^*1

0.5 dB

2 dB

5 dB

7 dB

3 dB

6 dB

9 dB

13 dB

Max. measurement distance^*2

1 km

5 km

20 km

30 km

10 km

25 km

40 km

60 km

Optical budget^*1*8

1 dB

4 dB

7 dB

9 dB

5 dB

8 dB

11 dB

15 dB

Measurement accuracy^*3*4*5*6*7

4 με / 0.25 ℃

30 με / 1.5 ℃

Short time repeatability^*3*4*5*6*7

2 με / 0.1 ℃

20 με / 1.0 ℃

Long time repeatability^*3*4*5*6*7

4 με / 0.25 ℃

10 με / 0.5 ℃

Measurement time^*6*7

10 seconds（minimum)

30 seconds（minimum)

Measurement accuracy
for hybrid mode ^*9

4 με / 0.25 ℃

30 με / 1.5 ℃

Repeatability
for hybrid mode ^*9

4 με / 0.25 ℃

30 με / 1.5 ℃

Input-output fiber

Single mode optical fiber

Fiber connector

FC-APC (default) / SC-APC (factory option)

Suitable fiber

Single mode optical fiber

Power supply

AC100～240V 50/60Hz 350VA

Laser class

Class 1 (IEC60825-1: 2001)

Dimensions / Weight

approx. 450(W) × 658(D) × 295(H) mm / 35 kg

Operating temperature

10~40℃, Humidity below 85% (no dew condensation)

Storage temperature

0～50℃

Place of production

Japan

Updated：2026/04/16

*1	Based on 2^15 average cycles (TW-COTDR) / Based on 2^18 average cycles in progressive measurement mode (PSP-BOTDR or BOTDR).
*2	Based on average fiber loss of 0.2 dB/km using SM optical fiber (UV type).
*3	Based on the measurement of strain-free SM optical fiber (UV type).
*4	Based on the measurement of strain-free SM optical 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 settings of 50m range, 2^14 count settings, 41 scan steps excluding the time for Pulse Adjustment.
*7	Within the settings of 50m range, 2^10 count settings, 401 scan steps excluding the time for Pulse Adjustment.
*8	Within the allowable range being adjusted by the optical power, except the case of nonlinear phenomena.
*9	The measurement mode of TW-COTDR and PSP-BOTDR or BOTDR used with conditions of 1-8 applied.