Cyclops Plunger Arrival Sensor

Cyclops logo


Cyclops is not your average plunger arrival sensor. Utilizing modern Geomagnetic Sensing Technology™, market-leading Cyclops is the most advanced and reliable sensor available.

Within the rugged enclosure lies a geomagnetic “eye” and a tiny yet powerful microprocessor. When powered, Cyclops is actively watching for a change in the earth’s magnetic field around it to signal plunger arrival. Constantly filtering out “background noise” from nearby equipment or environmental changes, Cyclops is able to consistently detect any type of plunger as it arrives at surface.

Want to see what Cyclops sees? Every Cyclops comes equipped with a communication port for testing and troubleshooting with Vision Device Management software for PC. With unrivaled accuracy and reliability, it’s no wonder so many of North America’s top producers have standardized on Cyclops for plunger detection.


Designed for reliable operation in extreme conditions, Cyclops detects plunger arrivals from up to 3 feet away, and operates within a temperature range of -40˚C to +70°C (-40°F to +160°F). For utmost accuracy, Cyclops allows operators to adjust sensitivity levels easily with a built-in 7 setting dial. Lower sensitivity to eliminate false detects caused by nearby equipment or tools. Raise sensitivity to increase visibility of a plunger that doesn’t fully enter the lubricator, or to detect well movements caused by a non-ferrous plunger entering the lubricator.



ETC Cyclops Hawkeye Plunger Sensor

Cyclops features a ½” NPT port to securely fasten either a Teck connector and armored cable, or a standard cable gland and instrumentation cable.  Cyclops operates over a wide range of input voltages, simplifying inventory management. 

The intrinsically safe Cyclops IS and ATX models are protected by a rugged watertight aluminum enclosure filled with hardened epoxy. Built-in mounting legs support a standard hose clamp for easy and secure installation. Captive screws in the enclosure lid avoid lost time searching for fallen screws in water, snow or mud.

The explosion proof Cyclops ExP is protected by a rugged weather-resistant aluminum explosion proof enclosure. Two hose clamps are included for easy and secure installation.

Case Study



Cyclops operates as a normally open dry contact. Simply connect the 3 wire interface to power, ground, and signal, and Cyclops is ready to detect any plunger. Cyclops uses Geomagnetic Sensing Technology™ as opposed to a traditional coil. This technology allows Cyclops to detect slow moving, or even static plungers. In addition, the plunger does not have to fully travel past Cyclops to be “seen”; allowing a wider range of mounting locations. Geomagnetic Sensing Technology™ provides additional advantages including the ability to control the sensitivity and provide a digitally controlled 5 second switch closure. Like all ETC products, Cyclops is designed to be extremely low power. On average, Cyclops draws less than 800 uA of current, fitting into all power budgets.

Manual App Notes Accessories



ETC ALiEn plunger lift controllerALiEn² Plunger Lift Controller
ALiEn²’s intelligent and effective optimization algorithms will help you achieve maximum production.

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etc iris wireless bridgeGo Wireless with Iris 
Replace traditional wire & trenching with the plug-and-play Iris Wireless Bridge.

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etc sasquatch plunger velocity sensorSasquatch Plunger Velocity Sensor 
Optimize production & improve wellsite safety using plunger surface velocity.

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etc vision device managementUpgrade, Test & Troubleshoot Cyclops with Vision Software 
‘See what Cyclops sees’ with this free tool. Product updates, documentation, testing & troubleshooting for ETC sensors and controls.

More Info




Supply Voltage 5 V – 24 V DC
Current Draw Typ. – 0.77 mA, Max. – 0.80 mA
Switch Interface Dry contact, normally open, 100 Ω impedance
Communications Interface 1 wire RS-485 test interface
Operating Temperature -40°C to +70°C (-40°F to +160°F)
Certification (IS Model) Class I, Zone 0, AEx ia IIB T4

Class I, Division 1, Groups C, D T4; Ex ia IIB T4

Class I, Zone 2, Group IIC T4

Class I, Division 2, Groups A, B, C, D T4

Certification (ATX Model) CE Ex II 3G Ex nA IIC T4 Gc
Certification (ExP Model) Class I, Zone 1, AEx d IIB T4

Class I, Division 1, Groups C, D; Ex d IIB T4

Where to Buy

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Case Studies

Major producer in South Texas uses ALiEn2 to achieve 16,000% ROI

The ALiEn2 plunger controller replaced a competitive controller on a plunger lift well that was not meeting production expectations. Production was doubled within 12 days and the well has continued producing at the higher rate since.

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Cyclops proves 100% accuracy, becomes standard for major producer in the San Juan Basin

The Cyclops sensor was installed on wells that were frequently missing plunger arrivals, leading to 100% reliable detection of the plunger.

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