ALiEn2 Plunger Lift Controller


plunger lift controllerRELIABLE

The ultra-reliable ALiEn2 plunger lift controller keeps production at it’s peak and operator intervention to a minimum. Designed to withstand extreme conditions, ALiEn2 functions reliably in temperatures as low as -40°C and up to +70°C (-40°F to +160°F). ALiEn2’s unique display technology ensures full operation over this entire temperature range. In areas that experience long periods of low sunlight, ALiEn2 draws so little energy from its rechargeable battery that it will operate for more than 8 months*,** without a charge. Recharge with ETC’s compact 1.1 W solar panel, which comes standard with every ALiEn2 plunger lift controller.
Brochure Case Study Download Simulator (.exe)


Installation and setup of ALiEn2 is fast and simple. The universal mounting bracket included with every ALiEn2 supports a variety of mounting locations from shack to well head. Features like the install key, dual purpose numeric/navigation keypad, and a user-friendly menu make configuration effortless. The electronics module removes quickly and easily for upgrading and maintenance, no tools required.
Quick Install Guide


Each ALiEn2 is protected by a Type 4 (dust and splash proof), powder coated steel enclosure featuring a locking door. Pre-punched holes provide a variety of options for fastening solenoids and wiring connectors. Solenoids are securely mounted outside the enclosure to make regular maintenance quick and easy, and avoid corrosion of electronic components.
Manual App Notes


Every ALiEn2 comes certified to the highest and most up-to-date safety standards available, providing unlimited safe installation locations. Features such as Fast Velocity, Dangerous Velocity, and a variety of configurable alarms protect your wellhead equipment and prevent accidents.
Haz Loc Certificate


ALiEn2 is the most feature-rich plunger lift controller in it’s class. Use as a simple well intermitter or in conjunction with a plunger and arrival sensor to optimize production. Protect your well by using a line pressure device to shut in on high line pressure. Log your plunger’s mileage with Plunger Tracking, and use Vent Tracking to keep tabs on vent time. As new features become available, upgrading your controller is fast, easy, and convenient with Vision software.


Every ALiEn2 includes a standard Modbus communication port for remote monitoring and control, and is preconfigured to work with several popular SCADA solutions. ALiEn2 can also be configured to work with your internal SCADA system. No SCADA? No problem! ALiEn2 is fully functional and accessible right on site.
Vision™ SCADA


ALiEn2’s intelligent and effective optimization algorithms will help you achieve maximum production.

Adaptive Seeking Velocity Optimization™

This patented¹ algorithm reduces the need for operator intervention (thus eliminating opportunities for human error) by making automatic adjustments that are proportional to the current flow/close time. This method was used with average plunger velocity to double gas well production in a 2015 case study. When Adaptive Seeking Velocity Optimization™ is used with a plunger arrival sensor such as Cyclops®, ALiEn² reacts to the average velocity of the plunger, making proportionate changes to the amount of Close and Afterflow time for the well. The user specifies a Target Rise Velocity, which ALiEn² then works to achieve. For best results, use a Sasquatch® Plunger Velocity Sensor in conjunction with Adaptive Seeking Velocity Optimization™ to maximize production using real-time Surface Velocity. ALiEn² is the first plunger lift controller capable of optimizing on Surface Velocity; a standard feature in the ALiEn² Expert model, and also available as an upgrade for the ALiEn².

 ¹Patent Number: 9297238

Why Optimize on Velocity?


Pressure Optimization

Use a combination of Line Pressure, Casing Pressure**, Tubing Pressure**, and Differential Pressure** to optimize the well. ALiEn2 automatically adapts to use enabled devices. Optimize on Flow Rate (AGA 3 table based) when using a Line Pressure and Differential Pressure sensor.

Load Factor

Load Factor is a parameter that can be used to determine when to open a plunger lift well to rise the plunger.  It is a ratio of the slug size (casing pressure – tubing pressure) to the lifting pressure (casing pressure – line pressure).  It is used by a number of different control systems as a standard optimization setting and is a standard feature on the ALiEn² Expert plunger lift controller. Please note that this feature requires a pressure splitter.


ETC Cyclops Hawkeye Plunger SensorCyclops Plunger Arrival Sensor 
Utilizing modern Geomagnetic Sensing Technology™, Cyclops is the most advanced and reliable plunger sensor available.

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Sasquatch Plunger Velocity Sensor 
Use Sasquatch in conjunction with ETC’s patented Adaptive Seeking Velocity Optimization™ in the ALiEn² Expert for best results.

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Upgrade ALiEn2 with Vision and LinkUpgrade, Test & Troubleshoot ALiEn² with Vision Software 
Keep your controller loaded with the latest features using this free tool. Product updates, documentation, testing & troubleshooting for ETC controls and sensors.

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ETC Link Device ConnectionLink Device Connection
Link connects Cyclops plunger arrival sensors, Sasquatch velocity sensors, and ETC plunger lift controllers to our Vision Device Management platform.
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ETC GEMS Pressure TransducerHigh Quality Pressure Sensors
GEMS pressure sensors feature all stainless steel wetted parts, a broad selection of electrical and pressure connections and a wide choice of electrical outputs.
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Pressure Splitter
The new Pressure Input Splitter allows additional Pressure Transducers to be connected to the ALiEn2 Expert plunger lift controller.
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ETC battery chargerBattery Charger
A quick and convenient way to top up a spare controller battery prior to replacement.
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controller solar panel mounting bracketSolar Panel Mounting Bracket
Quickly mount your controller solar panel to virtually any surface, including right on top of your controller.

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ETC controller mounting bracketUniversal Controller Mounting Bracket 
Each ALiEn² comes with the innovative Universal Mounting Bracket. With support for wall, single vertical stud, single horizontal stud, vertical pipe, horizontal pipe, or valve mount, this is the only mounting bracket you will ever need.

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Looking for replacement parts?   Click here



ALiEn2 Expert

Operating Temp -40°C to +70°C (-40°F to +160°F) -40°C to +70°C (-40°F to +160°F)
Current Draw Typ. – 0.5 mA, Max. – 190 mA Typ. – 0.5 mA, Max. – 190 mA
Battery 6 V, 5 Ah 6 V, 8 Ah
Valves Supported 1-2 1-3
Standby Time 5+ Months*
8+ Months*,**
Solar Panel 6 V, 1.1 W 6 V, 1.1 W
Arrival Sensor Cyclops, Most other vendors Cyclops, Sasquatch, Most other vendors
Other Inputs Line Pressure

Inputs can be dry contact switch or 0.5 V to 4.5 V sensor

Line Pressure or Tubing Pressure, Casing Pressure or Differential Pressure
Inputs can be dry contact switch or 0.5 V to 4.5 V sensor
Cycle History Last 25 Cycles Last 25 Cycles
Daily History Current Day + 14 Previous Days Current Day + 14 Previous Days
Communications Interface 2 wire RS-485 Modbus Slave 2 wire RS-485 Modbus Slave
2 wire RS-485 Modbus Master
Certifications Class I, Zone 0, Ex/AEx ia [ia] IIB
Class I, Division 1, Groups C and D
Class I, Zone 0, Ex/AEx ia [ia] IIB
Class I, Division 1, Groups C and D
*Average temperatures of -20°C, 24 valve operations a day, 10 minutes a week of display-on time, and a Cyclops arrival sensor. 
**Expert model.

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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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