NEUBRESCOPE NBX-6166U

Long-Range Model Supporting Both Single- and Double-Ended Measurements

Brillouin measurement: PPP-BOTDA＆BOTDR
Maximum measurement distance　100km
Maximum spatial resolution　2.5cm
Single-ended＆Double-ended

The NBX-6166 has been upgraded to the NBX-6166U with a redesigned enclosure and improved spatial resolution from 10 cm to 2.5 cm.

Specification

Laser Wavelength	1550 ± 2 nm
Distance Range	100 m～100 km
Measurement Frequency Range	9～13 GHz
Range of strain measurements	-30,000 to +40,000 με (-3% to +4%)
Measurement Frequency Scan Step	5, 10, 20, 50 MHz
Readout Resolution	5 cm (default), 2.5cm (minimum)
Sampling Points	600,000 (default), 3,000,000 (maximum)
Average Count Settings	2^5 ～ 2^23 times (incl, Hardware Average Count 2^16)
Function	PPP-BOTDA
Pulse width	0.25 ns	0.5 ns	1 ns	2 ns	5 ns	10 ns	-
Spatial resolution	2.5 cm	5 cm	10 cm	20 cm	50 cm	1 m	-
Dynamic Range^*1	0.5 dB	1 dB	2 dB	3.5 dB	6 dB	8 dB	-
Measurement Range^*2	0.5 km	1 km	5 km	10 km	20 km	25 km	-
Function	BOTDR
Pulse width	5 ns	10 ns	20 ns	50 ns	100 ns	200 ns	500 ns	1000 ns
Spatial resolution	0.5 m	1 m	2 m	5 m	10 m	20 m	50 m	100 m
Dynamic Range^*1	3 dB	5 dB	8 dB	12 dB	15 dB	16 dB	22 dB	24 dB
Measurement Range^*2	10 km	15 km	25 km	40 km	45 km	50 km	70 km	80 km
Strain Measurement Accuracy^*3	PPP-BOTDA= 20με BOTDR= 40με
Temperature Measurement Accuracy^34	PPP-BOTDA= 1.0 ℃ BOTDR= 2.0 ℃
Repeatability^34*5	PPP-BOTDA= 10 με / 0.5 ℃ BOTDR= 20 με / 1.0 ℃
Function	COTDR
Pulse width	5 ns	10 ns	20 ns	50 ns	100 ns	200 ns	500 ns	1000 ns
Spatial resolution	0.5 m	1 m	2 m	5 m	10 m	20 m	50 m	100 m
Dynamic Range^*1	10 dB	13 dB	16 dB	20 dB	23 dB	26 dB	30 dB	30 dB
Measurement Range^*2	27 km	40 km	50 km	60 km	70 km	80 km	80 km	80 km
Applicable Sensing Fiber	Single mode optical fiber
Connector Type	FC-APC (factory default) / SC-APC (factory option)
Input/output Interface	USB 2.0 x2, USB 3.0 x2, LAN x2, DisplayPort x1
Power Supply	AC 100～240V, 50/60 Hz, 350 VA
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: 2026/04/22 Specifications are subject to change without notice. 1 Based on 2^16 average cycles. 2 Based on average fiber loss of 0.3 dB/km using single mode fiber. 3 Based on the measurement of strain-free, UV-coated fiber. 4 Based on the measurement with strain-free, UV-coated fiber and in constant temperature environment. 5 Maximum standard deviation of measurement value in 5 consecutive measurements for 100 consecutive points. 1-5 are all based on a frequency scan step of 5 MHz with Pre-Pump Adjustment on.