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Cyclops L

Cyclops L Portable pyrometers are a range of premium quality, highly accurate hand-held instruments. Ergonomic single-handed use non-contact thermometers, provide easy, accurate point-and-measure temperature readings.

Easy to handle, simple to operate, Cyclops L portable non-contact pyrometers provide precise temperature measurements. Easily take measurements in multiple locations and verify online pyrometer readings. Durable, yet lightweight construction means you can operate it for hours at a time without fatigue.

Designed for single-handed use, Cyclops L’s high-resolution lens sighting and an ergonomic one-handed use design, make it simple for you to take safe, accurate temperature readings in hostile environments where you will have a spare hand to steady yourself.

With four, trigger-controlled data-logging modes available, Cyclops L stores up to 9,999 readings internally. Later the recorded data can be transferred via Bluetooth or USB to a PC running free Cyclops Logger software to view, analyze the temperature readings.

Several models are available for the specific process challenges of liquid metal, high temperature, medium-temperature, and furnace applications, Cyclops L provides highly accurate temperature measurements for the glass, hydrocarbon processing, industrial processing, and steel industries.

Have questions? Call +61 2 9622 6327


Cyclops L function for extended periods, with on-board data storage allowing up to 9,999 measurement points to be recorded inside the thermometer. A rugged instrument jacket protects Cyclops L against harsh conditions.



Cyclops L range is easy to use – High quality, Through the Lens (TTL) sighting means that you simply look through the eyepiece and focus the lens on the desired target. A small graticule within the view exactly defines the area that’s being measured. Then simply pull the trigger. Switch between four modes for data-logging. Temperature readings are displayed within the eyepiece and simultaneously on a second display panel on the instrument’s side. This allows a colleague standing next to you to also view the readings. Wireless Bluetooth data transmission further enhances the Cyclops operation.



Ideal for regular monitoring of sites with multiple measurement locations and verifying readings of permanently installed pyrometers,. Free to download Cyclops Logger software provides configurable measurement routes for your process, uploadable to your thermometer. Pre-configured settings include emissivity and window correction for each measurement location.

 CO55L C100L C160L C390L 
Measurement Range1000 to 2000 °C / 1832 to 3632 °F600 to 3000 °C / 1112 to 5432 °F200 to 1400 °C / 392 to 2552 °F450 to 1400 °C / 842 to 2552 °F
ApplicationsIdeal for Molten Metals and Foundry ApplicationsSteel, Glass, Refractories, Heat Treating, Semi-conductorsSteel, Heat Treating such as welding, tampering, annealing, and semi-conductorsIdeal 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.

 CO55L C100L C160L C390L 
Measurement Range1000 to 2000 °C / 1832 to 3632 °F600 to 3000 °C / 1112 to 5432 °F200 to 1400 °C / 392 to 2552 °F450 to 1400 °C / 842 to 2552 °F
DisplayExternal 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 ModeContinuous, Peak, Valley and advanced MeltmasterContinuous, Peak, Valley and AverageContinuous, Peak, Valley and AverageContinuous, Peak, Valley and Average
Data Logging9999 readings and 9 routes internally; Mobile (4GB standard storage) or PC logger software ( via Bluetooth® or USB connector)
Data Logging ModesClassic, Burst, Latched, Route
Optical System9° field of view; eyepiece adjustable -3.75 to +2.5 diopters
Focusing RangeFixed focus, nominally at 5 m / 197 in. from pyrometer body datum1 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 lens1 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 lens1 m / 39.3 in. to infinity
Minimum Target SizeParallel 28 mm / 1.1 in target spot diameter from lens to 5 m / 197 in5 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 lens5 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 lens4.8 mm / 0.19 in. at 101.4 cm, / 39.9 in nominal from the pyrometer body datum
Spectral ResponseNominally 0.55 μm1 μm with advanced spectral filtering1.6 μm with advancedspectral filteringNominally 3.9 μm
Emissivity Adjustment0.10 to 1.20 in 0.01 step graduations
Response Time30 ms30 ms30 ms<500 ms (to 98%)
Display Update Time0.5 s
Accuracy<0.5% (K)≤0.25% (K)± 0.25% C + 2 °C±0.5% (K)
Measurement Resolution0.1 °C / 1 °F
Measurement Field of ViewFixed Focus180:1 circular180:1 circular180:1 square
Repeatability<1 °C / 2 °F≤1 °C / 2 °F≤1 °C / 2 °F≤1 °C / 2 °F
Operating Temp. Range0 to 50 °C / 32 to 122 °F
Power RequirementOne MN1604 / 6LR61 / PP3 Battery or USB
OutputBluetooth® / USB Connector
Weight0.83 kg / 1.8 lb.
Free Data-Logger SoftwareSoftware available at Cyclops Logger (PC & Mobile)
Standard AccessoriesLens cap, protection window/filter, battery, wrist strap, USB cable, heat protection jacket
Optional AccessoriesWaterproof carry case, long eye relief eyepieceClose-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 eyepieceWaterproof carry case, long eye relief eyepiece


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