Infrared Temperature Measurement | Combustion & Environmental Monitoring

Cyclops 390L - Measuring Temperatures in Furnace Applications

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Furnace Applications

Reformer Tube Furnaces

Unique Features of Cyclops 390L range of thermometers

The unique features of the Cyclops 390L portable non-contact pyrometer make it the ideal instrument for accurate non contact temperature measurements in hydrocarbon-fuelled furnaces. Operating at a 3.9µm (a transmissive waveband), for hot targets, water vapour and CO2 are invisible. Reformer Tubes are very expensive, periodic refractory checks can identify potential failure.

Where measurement errors due to hotter background are a problem, errors can be minimised using the Cyclops 390L FurnacePro. The measured temperature is displayed in four simultaneous modes: continuous, peak, mean and valley, with user selected mode for the viewfinder display.  Accurate sighting is ensured by the clear TTL optics. Focusing is variable from 1m to infinity. Emissivity compensation is provided via the icon-based menu system. The operating waveband has been carefully chosen to minimise errors due to uncertainty in emissivity and the effects of atmospheric vapour components.

The Cyclops 390L  features standarduser-friendly "Bluetooth®" wireless communications or a USB connection for PCs or tablets

Get it on Google PlayThe Land Cyclops Logger Software allows you to connect a Land Cyclops portable pyrometer to a mobile device and view, analyse and record live temperature readings. Get the software here for free!

Key Benefits

  • Non-contact measurement technology - No contamination, interference or damage to process or material
  • High accuracy measurement and repeatability - Confidence in the measurement for process control and quality control applications
  • Long term drift-free measurement - Long term confidence in the measurement
  • Narrow, square 180:1 field of view - Optimum shape to measure reformer tubes or on slabs, billets etc on reheat furnaces
  • On-board data storage of up to 9999 measurement points Data & Time stamp, plus 9 'routes' of up to 99 readings per route - High capacity measurement storage
  • Bluetooth® or USB Connector for data download / upload - Two convenient methods available, no hanging cables with Bluetooth®
  • Unique Route mode - allowing capture and storage of measurement data repeatedly at set locations around your plant.  Nine predefined routes (sets of location IDs and emissivities) Each route can contain up to 99 location IDs and emissivities) Note: Requires optional data logger software to activate this feature
  • A new protection cover - increases the robustness of every model in the range
  • A new lens protector - maintains the optics in good condition
  • High Measurement Resolution - 5 digit display - measured temperature resolved to 0.1°C/ 1°F
  • Long term drift-free measurement - Long term confidence in the measurement
  • Narrow, square 180:1 field of view - Optimum shape to measure reformer tubes or on slabs, billets etc on reheat furnaces
  • Single handed operation, contact free measurement  -  Excellent ergonomics, Better Safety in hazardous environments
  • Calibrated and traceable to National Standards - Your guarantee of measurement accuracy
  • Four Measurement modes - Continuous, Average, Peak and Valley - Measurement to exactly meet your own  specific requirements
  • Innovative ‘notched’ spectral filter - Eliminates the effects of atmospheric water vapour


  • Includes new Data Logger software for both PC and Mobile Devices including the unique Route Management utility
  • UKAS Certified instrument calibration

Data Output Modes

  • Single mode: logs a measurement for each trigger release
  • Latch mode: logs continuous, average, peak and valley readings from the first trigger release until the second
  • Burst mode: logs a stream of measurements whilst the trigger is held pressed - approximately 30 readings / sec, up to a maximum of 999 readings per burst.
  • Route mode: This mode is ideal for users who need to take a number of readings on a regular tour of their plant or process. The pre-loaded locations help to guide the user along each route