PRE.VENT Industrial Temperature Monitoring

Luna PRE.VENT uses the most advanced and industrialized DTS providing flexible monitoring solutions for online surveillance of a large array of industrial applications. With customized solutions and easy installation the LIOS PRE.VENT product line accommodates temperature monitoring of chemical processing plants, reactor vessels, gasifiers, induction furnaces, LNG tanks and containments, as well as pipelines, and other infrastructures.

Luna Innovations’ PRE.VENT was carefully designed and thoroughly tested targeting highly reliable performance and smooth operation in industrial environments providing robustness, scalability, and an option to have up to 16 individual channels enabling the coverage of complex infrastructure. And even on large complex installations the PRE.VENT still provides a cost-effective and yet fully automated data analysis with very precise and accurate temperature mapping.

Using only one single optical fiber, our DTS system covers thousands of measuring points along the sensor cable making the DTS technology far more efficient in installation and maintenance cost compared to other sensor technologies.  Furthermore, the fiber can withstand very high temperatures, mechanical and environmental exposures and can, therefore, be used for a very large variety of applications where extreme heat is a challenge: for instance in induction furnaces or chemical reactors.

In combination with our DTS system and a powerful software package, it is possible to get a very detailed cyclic temperature read every few centimeters and store all this data for further analysis. In the case of fiber or DTS failure, our system is still able to monitor the installation due to built-in redundancy, offering an economic solution with less downtime and constant surveillance.

At Luna we are strong in design engineering and turn complex and customized solutions with different cable designs into simple turn-key solutions. With PRE.VENT flexibility is key and whether the project is reactor monitoring, leak detection, industrial temperature monitoring, or structural monitoring, the PRE.VENT product line is a reliable cost-effective temperature monitoring solution.

Mean Time Between Failures of 40+ years

Reliability is critical when it comes to DTS systems. With 5,000 DTS systems in operation, we have calculated a remarkable MTBF of 40+ years.

Made from Telcordia-rated components, passive cooling, and no moving parts, our DTS systems are basically maintenance-free. The self-diagnosing features free you from worrying and allow you to focus on other important tasks.


  • Measurement range -170°C to +450°C
  • ATEX/IECEx certification
  • Operating temperature -10°C to +60°C
  • Up to 16 channels
  • 70 km range per measurement channel
  • Mean Time Between Failure of 40+ years

PRE.VENT covers a broad range of industrial applications offering operational safety, real-time control, and lifecycle optimization of assets like reactors, gasifiers, LNG tanks, containment, and pipelines, as well as ecological engineering projects.

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Distance Ranges of PRE.VENT DTS models

PRE.VENT -300, -400, -500, -600, -700 30km, 40km, 50km, 60km. 70km

Data Storage/Communication/Interfaces

Communication Interfaces 2x Ethernet TCP/IP, USB, (optional: WLAN, GSM)
Communication Protocols (options) XML, MODBUS, DNP3, IEC60870, IEC61850
I/O Board (optional*) 4 inputs/12 outputs
Analogue Sensors Interface Board (optional*) 4x Pt100, 2x 0(4)-20mA and 2x 0-10V
Analogue Outputs (optional external module) 4 - 20mA

*2 optional boards can be installed in total

Electrical Data

Power Consumption, max. (DC / AC options) 40 W/45 W
Operating Voltage (DC-1 option) 12 … 24 V DC (-15%/+10%)
Operating Voltage (DC-2 option) 24 … 48 V DC (-15%/+10%)
Mains Voltage (AC option) 100 … 240 V AC 50..60 Hz / 110… 220 V DC (-15%/+10%)

Conformity to Standards

Explosion safety (option)* EX II (1) G [Ex op is T4 Ga] IIC / II (1) D [Ex op is Da] IIIC / I (M1)
[Ex op is Ma] I

*Qualification in process

Optical Data

Optical Channels (internal) 1, 2, 3, 4, 6, 8, 9, 12 or 16
Fiber Configuration No loop or termination required
Optical Connector(s) E2000/APC
Fiber Types Single-mode 9/125, e.g. ITU-T G.652, G.655 or G.657
Laser Classification Class 1M (IEC60825-1), eye-safe wavelength

Measurement Performance*

Sampling Interval 0.25, 0.5 or 1 m
Spatial Resolution 1, 2, 3 or 5 m
Temperature Resolution, minimum < 0.1°C
Temperature Resolution @ 10dB Optical Loss < 1°C
Temperature Accuracy 2°C**
Measurement Time 1 to 20 min

*Measurement performance parameters are interdependent
**After calibration on a loose fiber without strain

Data Storage/Communication/Interfaces

Internal SSD Storage 8, 16, 32 or 64 GB
Programmable Inputs/Outputs 4/10
Fixed Outputs Collective fault and alarm

Mechanical Data

Rack Space 19-inch rack, 3 height units
Dimensions (HxWxD) 13.3 x 43.9 x 40.3 cm
Weight 15 kg

Environmental Conditions

Storage Temperature -40°C to +85°C
Operating Temperature -10°C to +60°C
Humidity (relative) ≤95 % (non-condensing)
Protection Class (IEC 60529) IP51

Conformity to Standards

Electrical safety IEC/UL 61010-1, LV directive 2014/35/EC, CAN/CSA-C22.2
EMC* EN61326-1, EN61000-6-2,3,-4-2,3,4,5,6,8,11,-3-2,3, FCC 47 CFR Ch.1 Part15
Hazardous substances, waste RoHS directive 2011/65/EC, WEEE directive 2002/96/EC
Environmental testing* IEC 60068-2-6,14,27,30
Functional safety (IEC61508)* Hardware design compliant to Safety Integrity Level SIL2

*Qualification in process