Airborne Lidar Pipeline Inspection Service - ALPIS™

ALPIS™ System Components

  • ALPIS™ is comprised of an airborne sensor unit and operator’s console.
  • The sensor is mounted to our Bell Jet Ranger helicopters.
  • Weighing in at 250 lbs, the payload is light enough to allow the crew and one pipeline observer on-board during a typical mission.
  • The main sensor enclosure houses the eye-safe laser, computer, receiver optics and detectors.
  • In addition, the system is equipped with a high resolution imaging cameras and a GPS receiver.
  • The combination of an eye-safe laser sensor, imaging and GPS data makes it possible to precisely locate hydrocarbon leaks.
  • The sensor takes 400 readings per second and checks it’s calibration once every second.
  • An operator, present on every flight, controls the system using a standard laptop interface and verifies the integrity of the data.


Principle of Operation

LASEN’s ALPIS™ is based on a mid-infrared Differential Absorption Lidar (DIAL) chemical sensor. The principle of DIAL relies on the selective absorption of laser light by different chemicals. The mid-infrared laser used in the ALPIS™ system is particularly well suited for detection of hydrocarbons such as methane, propane, and butane, as well as volatilized liquid petroleum products.


How It Works

  • The known energy of the eye-safe laser beam is transmitted down from the aircraft to illuminate the area on the ground above and around the buried pipe.
  • The light reflected from the ground is collected by the sensor’s receiver, and the amount of received energy is measured.
  • If the eye-safe laser beam passes through a gas plume emanating from a pipeline leak, the received energy will be diminished due to the absorption of laser light in the plume.
  • This absorption signature is used to locate the leak and to assess its approximate magnitude.



LASEN has recently updated it's entire fleet of Lidar sensors, which are lighter and more technologically advanced, into service. The units employ a new PipeVision™ video camera that provides high resolution video of more than 800 feet of your right of way at their widest angle and is tied to continuous GPS location. This video will allow our customer to document the status of their right of way, the above ground facilities, potential encroachments, vegetation, erosion threats, and the critical terrain features such as water crossings and wetlands. LASEN customers will receive both the standard inspection data plus the new video to advance their pipeline safety/integrity programs.

ROW Inspection

High Resolution Video for Visual Inspection

Maximum Coverage

Camera captures 800 ft of ROW at widest angle

ROW Compliance

Identify potential encroachments, vegetation, erosion threats ...

Aspen Avionics

We have now integrated Aspen systems into our helicopters that give us real time data on wind direction and speed. Using the Aspen systems, along with our industry leading 1,600 sq. ft. footprint on the ground, we can fly with precision accuracy directly above the pipeline or stay slightly downwind if required, locating any possible indication better than any competitive system on the market.

Professional-Grade EFIS

Airspeed and altitude tapes, with altitude alerter

Built-in GPS Steering

Base map with flight plan legs and waypoints, curved flight paths


Integral Air Data Computer and Attitude Heading Reference System