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Cyclops L Handheld Portable Pyrometer

Cyclops L
Cyclops L portable pyrometers are a range of premium-quality, highly accurate hand-held instruments that provide precise non-contact temperature readings. Easy to handle and simple to operate, they let you take measurements in multiple locations and verify the readings of on-line, permanently installed pyrometers. Durable yet lightweight, the Cyclops L handheld pyrometer can be operated for hours at a time without fatigue, making it a practical portable reference instrument for hot industrial processes.

  • Overview +


    CYCLOPS L AT A GLANCE

    FEATURE DETAIL
    Instrument type Handheld, portable non-contact pyrometer for single-handed use
    Sighting system High-quality Through the Lens (TTL) sighting with a graticule that defines the measured area
    Internal data storage Stores up to 9,999 readings inside the thermometer
    Data-logging modes Four trigger-controlled data-logging modes
    Data transfer Wireless Bluetooth or USB to a PC
    Software Free Cyclops Logger software to view and analyse readings
    Displays Temperature shown in the eyepiece and simultaneously on a second side display panel
    Durability Rugged construction with an instrument jacket to protect against harsh conditions
    Model applications Liquid metal, high temperature, medium temperature and furnace applications

    HIGHLY PORTABLE ACCURACY, BUILT TO LAST

    Cyclops L is designed to function for extended periods in demanding environments. On-board data storage allows up to 9,999 measurement points to be recorded inside the thermometer, while a rugged instrument jacket protects the pyrometer against harsh conditions. Its durable, lightweight construction means you can keep working for hours at a time without fatigue.

    HOW DOES THE LAND CYCLOPS L MAKE SINGLE-HANDED MEASUREMENT EASY?

    The Cyclops L is designed for safe, single-handed use, which is ideal in hostile environments where you need a spare hand to steady yourself. Its high-resolution lens sighting and ergonomic one-handed design make taking accurate readings straightforward:

    • Look through the eyepiece and focus the lens on the target — high-quality Through the Lens (TTL) sighting shows exactly what you are measuring.
    • A small graticule within the view precisely defines the area being measured.
    • Pull the trigger to take the reading, and switch between four modes for data-logging.
    • Readings appear in the eyepiece and simultaneously on a second display panel on the side, so a colleague standing next to you can also view them.

    Wireless Bluetooth data transmission further enhances everyday operation of the handheld pyrometer.

    WHAT IS ROUTE MANAGEMENT AND WHY DOES IT MATTER?

    Route management makes the Cyclops L ideal for regular monitoring of sites with multiple measurement locations and for verifying the readings of permanently installed pyrometers. Using the free Cyclops Logger software, you can build configurable measurement routes for your process and upload them to your thermometer. Pre-configured settings — including emissivity and window correction — can be stored for each measurement location, so every reading is taken with the right parameters.

    DATA LOGGING AND CYCLOPS LOGGER SOFTWARE

    With four trigger-controlled data-logging modes, the LAND Cyclops L stores up to 9,999 readings internally. Recorded data can then be transferred via Bluetooth or USB to a PC running the free Cyclops Logger software, where you can view and analyse your temperature readings.

    Download the free software here:

    MODELS FOR EVERY APPLICATION

    Several models are available for specific process challenges, covering liquid metal, high temperature, medium temperature and furnace applications. This makes the LAND Cyclops L a versatile portable pyrometer for molten metal temperature measurement, foundry and furnace work, and general hot-process spot checks.

    The Cyclops L range provides highly accurate temperature measurements for industries including:


  • Emissivity and Background Correction Calculator +




  • Specifications +


      CO55L  C100L  C160L  C390L 
    Measurement Range 1000 to 2000 °C / 1832 to 3632 °F  600* to 3000 °C / 1112 to 5432 °F  200 to 1400 °C / 392 to 2552 °F  450 to 1400 °C / 842 to 2552 °F 
    Display External backlit LCD display
    4-digit LCD in viewfinder     		 External backlit LCD display
    5-digit LCD in viewfinder     		 External backlit LCD display
    5-digit LCD in viewfinder     		 External backlit LCD display
    4-digit LCD in viewfinder 
    Measuring Mode Continuous, Peak, Valley and advanced Meltmaster Continuous, Peak, Valley and Average  Continuous, Peak, Valley and Average   Continuous, Peak, Valley and Average  
    Data Logging 9999 readings and 9 routes internally; Mobile (4GB standard storage) or PC logger software ( via Bluetooth® or USB connector)
    Data Logging Modes Classic, Burst, Latched, Route 
    Optical System 9° field of view; eyepiece adjustable -3.75 to +2.5 diopters
    Focusing Range Fixed focus, nominally at 5 m / 197 in. from pyrometer body datum 1 m / 39.3 in. to infinity 450 to 620 mm / 17.7 to 24.5 in. and 215 mm / 8.5 in. fixed focus - with optional close-up lens  1 m / 39.3 in. to infinity 460 to 630 mm / 18.1 to 24.8 in. and 217 mm / 8.5 in. fixed focus - with optional close-up lens  1 m / 39.3 in. to infinity 
    Minimum Target Size Parallel 28 mm / 1.1 in target spot diameter from lens to 5 m / 197 in  5 mm at 1 m / 0.19 in. at 39.3 in., 1.8 mm / 0.07 in. and 0.4 mm / 0.016 in. - with optional close up lens  5 mm at 1 m / 0.19 in. at 39.3 in., 2.0 mm / 0.08 in. and 0.5 mm / 0.2 in. - with optional close up lens  4.8 mm / 0.19 in. at 101.4 cm, / 39.9 in nominal from the pyrometer body datum 
    Spectral Response Nominally 0.55 μm  1 μm with advanced spectral filtering  1.6 μm with advancedspectral filtering  Nominally 3.9 μm 
    Emissivity Adjustment 0.10 to 1.20 in 0.01 step graduations 
    Response Time 30 ms 30 ms  30 ms  <500 ms (to 98%) 
    Display Update Time 0.5 s 
    Accuracy <0.5% (K)  ≤0.25% (K)  ± 0.25% C + 2 °C   ±0.5% (K)  
    Measurement Resolution 0.1 °C / 1 °F 
    Measurement Field of View Fixed Focus  180:1 circular  180:1 circular  180:1 square 
    Repeatability <1 °C / 2 °F  ≤1 °C / 2 °F ≤1 °C / 2 °F  ≤1 °C / 2 °F 
    Operating Temp. Range
    		 0 to 50 °C / 32 to 122 °F 
    Power Requirement One MN1604 / 6LR61 / PP3 Battery or USB 
    Output Bluetooth® / USB Connector 
    Weight 0.83 kg / 1.8 lb. 
    Sealing IP40
    Free Data-Logger Software Software available at Cyclops Logger (PC & Mobile)              
    Standard Accessories Lens cap, protection window/filter, battery, wrist strap, USB cable, heat protection jacket 
    Optional Accessories Waterproof carry case, long eye relief eyepiece  Close-up lenses, waterproof carry case, long eye relief eyepiece, Neutral Density filters: Options 1F or 2F - filters darken the image to provide better image contrast on bright targets, use two for higher temp. applications.  Close-up lenses, waterproof carry case, long eye relief eyepiece  Waterproof carry case, long eye relief eyepiece 
    *Measurement displayed 550 °C to 3000 °C / 1022 to 5432 °F
    MARCOM0346

  • Models +


      CO55L Meltmaster C100L  C160L  C390L 
    Measurement Range 1000 to 2000 °C / 1832 to 3632 °F  600 to 3000 °C / 1112 to 5432 °F  200 to 1400 °C / 392 to 2552 °F  450 to 1400 °C / 842 to 2552 °F 
    Applications Ideal for Molten Metals and
    Foundry applications    		 Steel, Glass, Refractories,
    Heat Treating,
    Semi-conductors    		 Steel, Heat Treating such
    as welding, tempering,
    annealing, and
    semi-conductors    		 Ideal for Reformer and
    Heater Tubes, Reheat
    Furnaces
      Some applications may be able to use another model than the one specified as ideal, so please contact us to discuss requirements

  • Frequently Asked Questions +


    Question Answer 
     What is the Cyclops L used for?  The Cyclops L is a handheld, non-contact pyrometer from LAND for accurate spot temperature readings of hot targets from 200°C to 3,000°C depending on the model. Backed by over 75 years of measurement expertise, it's a portable reference instrument that operators carry to the process for spot checks, audits and verifying fixed sensors. With internal storage for 9,999 readings, Bluetooth connectivity and traceable calibration, the Cyclops L is trusted as a portable calibration reference across steel, glass, foundry and heat treatment industries.
     What is the difference between the 100L, 160L and 390L? The Cyclops L series includes three models optimized for different applications: the 100L (600–1400°C) is the general-purpose industrial workhorse for most hot processes; the 160L (200–1600°C) extends to higher temperatures and is ideal for steel and glass applications; and the 390L (900–3000°C at 1 µm wavelength) is specifically tuned for molten metal and high-temperature furnace work. Each model uses a dedicated wavelength and optical system matched to its target temperature range for best-in-class accuracy.
     How accurate is the Cyclops L? The Cyclops L delivers reference-grade accuracy of ±0.5% of reading plus 1°C—precise enough that it's frequently used as the calibration reference for fixed pyrometers on the production line. The high-quality optics, precise sighting system and traceable calibration ensure consistent, reliable readings that engineers and quality teams can trust for process validation and equipment verification. 
     Does it include data-logging software? Yes—the Cyclops L works with LAND's  Cyclops Logger software for PC and mobile devices, enabling readings to be captured, logged, timestamped and reviewed for trend analysis and quality documentation. The instrument itself stores up to 9,999 readings internally, which can be transferred via USB or Bluetooth. This makes building a complete measurement history and generating audit-ready reports straightforward. 
     Can it be calibrated on-site? The Cyclops L is factory-calibrated by LAND using traceable blackbody sources and standards, ensuring accuracy you can trust for critical measurements. Rather than field calibration, recalibration is performed through LAND's service network to maintain traceability to national standards. This calibration traceability is exactly why the Cyclops L is specified as a portable reference pyrometer for verifying fixed sensors and meeting audit requirements. 

    Which wavelength should I choose?

    As a general rule for a monochromatic pyrometer, you should choose the shortest wavelength that is able to measure the required temperature, This is because the relationship between the intensity of infrared radiation and object temperature is strongest at short wavelengths, thereby reducing the uncertainty associated with changes in emissivity.

    For example, C100L (1.0 µm), C160L (1.6 µm) and C390L (3.9 µm) can all measure an object at 800 °C. However the C100 will give the most accurate measurement.

    Two models are available whose wavelengths have been chosen for specific applications. C055L operates at 0.55 µm and is designed for measurements of liquid metals. It features a Meltmaster mode which uses a special algorithm to provide a stable temperature measurement in the presence of sparks, smoke and other features which can produce sudden changes in the reading of a conventional pyrometer.

    The C390L operates at a wavelength of 3.9 µm, which has been specifically chosen for furnace temperature measurements. This is because flames do not emit radiation at this wavelength, ensuring that the readings are unaffected by flame interference.
    What is the smallest item I can measure with Cyclops?

    Cyclops C055L measures a 28 mm diameter area at any distance between 1 m and 5 m.

    Other models have a minimum spot size of 5 mm at a distance of 1 m.
    What can I do if the measured object is too bright for comfort? Excessively bright objects can affect C100L as it can measure temperatures as high as 3000 °C. It is available in two versions, either 1F (with one filter to reduce the intensity of visible light) and 2F (with two filters, providing a strong reduction in intensity). A removable dark filter is also available which can be placed over the lens in place of the standard clear protection window.
    The 1F model is the most flexible option. It can be used from 600 to 1400 °C with the clear protection window and from 1400 to 3000 °C with the dark filter.
    The 2F model can be used from 600 to 1800 °C without changing the filter, so it is best suited to applications such as glass melt tanks where temperatures between 1200 °C and 1800 °C are common. It can also be used up to 3000 °C with the dark filter.
    Can I use Cyclops in a hot environment?  Cyclops is rated for operation from 0 to 50 °C, so it can be used in most places the operator can work without suffering heat stress. A reflective, thermally-insulating jacket is available to protect the instrument from high levels of radiative heating
    What I/O is available?

    Cyclops can be connected to a PC or Android mobile device for data display and transfer of logged data. Both Bluetooth and USB mini connections are available. 

  • Video +

    • Precision Temperature Measurement of Liquid Metal in Foundries
      Precision Temperature Measurement of Liquid Metal in Foundries

      The Cyclops 055L Meltmaster portable non-contact thermometer gives accurate temperature measurement of liquid metal in foundries while providing a much higher level of operator safety and achieving significant savings on dip thermocouple consumables.

    • Liquid Iron Temperature Measurement in Casting Foundries
      Liquid Iron Temperature Measurement in Casting Foundries

      AMETEK Land offers multiple solutions for the complex temperature measurement of molten metal – from melting to pouring and casting. Our products meet the highest standards of quality and reliability to ensure performance under plant operating conditions.

    • Advances in Non-contact Temperature Measurement for Iron and Liquid Steel Production
      On-demand Webinar

      We introduce how advances in accurate non-contact measurements across a range of temperatures and under a variety of different application conditions ensures successful steel production and provides benefits in process and control. It considers key stages in the iron making process and molten steel slag detection from furnace to ladle to improve efficiencies and lower costs.

    • Fundamentals of Non-contact Temperature Measurement
      Fundamentals of Non-contact Temperature Measurement

      This webinar introduces the fundamentals of non-contact temperature measurement. What industrial processes benefit from these kinds of measurement and why this technology can be advantageous? Many examples are discussed and comparisons with other temperature measurement methods are shown.

  • Software +

    • AMETEK Land Software - Cyclops Logger (PC & Mobile)
      Cyclops Logger (PC & Mobile)

      Our world-leading products are fully supported by the latest Thermal Imaging Software. Standard and application-specific packages deliver the highest performance.

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