Overview
AMB400 is a distributed fibre optic temperature measurement system for online, real-time monitoring. It uses sensing fibre as sensor, offering flame retardancy, high voltage immunity. Host with FPGA+ARM, spatial resolution up to 0.05m, accuracy ±0.05℃~±0.8℃, up to 16 channels, 10km per channel. Ideal for power cables, busway systems, and pipelines.
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High-Precision Distributed Sensing
- Spatial resolution up to 0.05m
- Temperature accuracy ±0.05℃@500m
- Temperature resolution 0.01℃
- Measurement range -200…700℃
- Sampling resolution 0.05m/0.5m
Flexible Channel Configuration
- 4/8/12/16 channel options
- Single channel up to 10km
- Measurement time 3s typical
- Multi-mode fibre 50/125 or 62.5/125µm
- FC/APC connectors (E2000 optional)
Multiple Communication Interfaces
- 1 RJ45 Ethernet (Modbus-TCP)
- 1 RS232 (Modbus-RTU, firmware upgrade)
- 2 RS485 (Modbus-RTU, relay expansion)
- 8 onboard relays
- Supports up to 64 external relays
Stable & Reliable Design
- Conformal coating for circuit boards
- Dual photomultiplier detection
- Built-in temperature drift optimization
- Operating temp -10…60℃
Function
| Distributed Temperature Sensing | • Multi-mode fibre 50/125 or 62.5/125µm • Single-mode fibre 9/125µm optional • Measurement distance: 3.2km/10km • Spatial resolution: 0.05m/0.5m • Sampling resolution: 0.05m/0.5m |
| Temperature Measurement | • Measurement range: -200…700℃ • Temperature accuracy: ±0.05℃@500m / ±0.3℃@5km / ±0.8℃@10km • Temperature resolution: 0.01℃ • Measurement time: 3s typical (configurable) |
| Channel Configuration | • 4/8/12/16 channel models available • Each channel independently configurable • Channel status: optical signal quality, total length • Per-channel alarm status: fire, fibre break |
| Alarm Function | • Zone-based temperature monitoring • Up to 125 zones per channel • Configurable alarm thresholds per zone • Alarm types: fixed temp, rate-of-rise, pre-alarm • 8 onboard relays + up to 64 external relays |
| Communication | • 1 RJ45 Ethernet (Modbus-TCP) • Default IP: 192.168.100.123:5000 • 1 RS232 (Modbus-RTU, firmware upgrade) • 2 RS485 (Modbus-RTU) • Zone mode & meter-by-meter mode |
| Display & Indicators | • 4.3″ colour LCD display • LED indicators: power, run, fire, fault • Display temperature curves, fibre quality, network status • Alarm records & silencing function • Front panel reset key & power key |
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Specification
| Parameter | Value |
| Model | AMB400-DTS100-A04/08/12/16, AMB400-DTS005-A04/08/12/16 |
| Fibre Type | Multi-mode 50/125µm or 62.5/125µm (single-mode 9/125µm optional) |
| Spatial Resolution | 0.5m (DTS100), 0.05m (DTS005) |
| Sampling Resolution | 0.5m (DTS100), 0.05m (DTS005) |
| Positioning Accuracy | ±0.5m (DTS100), ±0.05m (DTS005) |
| Measurement Distance | 10km (DTS100), 3.2km (DTS005) |
| Measurement Time | 3s typical (configurable) |
| Temperature Range | -200…700℃ |
| Temperature Accuracy | ±0.15℃@100m / ±0.3℃@5km / ±0.8℃@10km (DTS100, 10s/ch) ±0.05℃@500m / ±0.5℃@2km / ±1℃@3km (DTS005, 10s/ch) |
| Temperature Resolution | 0.01℃ |
| Channels | 4/8/12/16 |
| Fibre Connector | FC/APC (E2000 optional) |
| Power Supply | 9-36VDC (typical 24VDC) |
| Power Consumption | 6W (DTS100), 8W (DTS005) |
| Communication | 1 RJ45 (Modbus-TCP), 1 RS232, 2 RS485 (Modbus-RTU) |
| Relay Outputs | 8 onboard + up to 64 external |
| Operating Temperature | -10…60℃ |
| Storage Temperature | -20…70℃ |
| Humidity | ≤93% RH (non-condensing) |
| Dimensions (W×D×H) | 482mm × 443mm × 89mm (2U) |
| Weight | 8kg |
| Protection | Conformal coating for circuit boards |
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FAQ
The system uses sensing fibre as the sensor, emitting laser pulses and detecting the Raman scattering signals generated in the fibre. By analysing signal intensity and transmission time, it achieves temperature measurement and location at each point along the fibre.
DTS100 series has longer measurement distance (10km) with 0.5m spatial resolution; DTS005 series has higher spatial resolution (0.05m) for short-distance high-precision applications, with 3.2km measurement distance.
The system supports 4/8/12/16 channels. For DTS100 series, maximum fibre length per channel is 10km; for DTS005 series, it is 3.2km.
The system supports multiple communication methods: 1 RJ45 Ethernet (Modbus-TCP protocol), 2 RS485 (Modbus-RTU protocol), and 1 RS232. Multiple interfaces can be used simultaneously for dual-network independent communication.
The system supports zone-based alarm threshold setting, with up to 125 zones per channel. Fixed temperature, rate-of-rise, and pre-alarm thresholds can be independently set for each zone via the debugging software or Modbus communication.
1) Fibre tension ≤100N; 2) Avoid twisting; 3) Avoid sharp bends, bending radius ≥20cm; 4) Keep fibre connectors clean and dust-free.
Summary
The AMB400 system provides continuous temperature monitoring over long distances with high spatial resolution and accuracy. Its fibre optic sensing technology is immune to EMI and suitable for harsh environments. Up to 16 channels and 10km range cover extensive installations. Zone-based alarms with relay outputs enable automated responses. An ideal solution for critical infrastructure where early fire or fault detection is essential.
