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DiTemp Reading Unit


Reliable and high performance Raman OTDR interrogator for field applications.
Measures full temperature profile over fiber optic sensing cables.


The DiTemp Reading Unit is designed for distributed temperature measurements for distances of up to 30km, with 1m spatial resolution and 10s measurement time. It is available in multimode and singlemode versions. This rack-mountable unit can be complemented with external multiplexers (4, 8, 16 channels), a relay module and a self-testing system (ATTS).

Depending on configuration and redundancy, the DiTemp system has been assessed as SIL 1 or SIL 2 compatible (Safety Integrity Level ). 

The system is used in a wide range of applications that require distributed temperature sensing, such as temperature monitoring of concrete in massive structures, leakage detection of pipelines, seepage monitoring in dams and levees, waste disposal sites, smart buildings, just to name a few.


Technical features

Distance range : 

12, 20 or 30 km

Spatial resolution :

down to 1 m

Sampling resolution :

0.5 m (< 12km), 1 m (> 12km)

Temperature resolution :

down to 0.1°C (project specific performance estimations available upon request)

Number of channels :

1 (up to 16 with external mux)

Fiber typology :

MMF 50/125 mm (ITU.T G.651)                                     

SMF 9/125µm (ITU.T G.652)

Technical specifications


Operating temperature :

5°C to 40°C

Storage temperature :

-15°C to +65°C

Humidity :

5% to 95% RH, non condensing

AC Power :

100V – 240V, 50Hz – 60Hz

DC Power :

24V or 48V supply option

Power consumption :

120W maximum

Dimension (HxWxD) :

180x435x480 mm

 Weight :

21 kg

Communication options :

Modbus, Ethernet, Volt free alarm module, TCP (through DiView Software)

Ordering Info
  • 14.2010 DiTemp Reading Unit
  • 14.2010.rm DiTemp Alarm Relay Module
  • DiTemp External Channel Multiplexer
  • 20.2010 DiView Data Management Software
  • 40.1010 DiTemp Installation Rack
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