A New Sensor Means New Solutions, Discoveries,Breakthroughs

New inSight® Sensor

The QVLA® process is the LED-based technology which is used by Motion Controls inSight® sensor. The QVLA® process works by utilizing an ultra-stable LED light source to fill a volume with diffuse light. The filled volume, called the “sensing volume” can be almost any enclosed volume. Since Motion Controls is a pneumatic cylinder company, the first use of the inSight® sensor utilized the inside of an air cylinder as the sensing volume. As the sensing volume changes, the amount of light measured in the sensing volume varies and can be resolved into linear or, given the correct shaped sensing volume, rotary motion. This process is performed by our inSight® sensor which is rugged, inexpensive, fast, and non-contact. Thus far, inSight® has been used to sense the position of industrial machinery, replacing traditional potentiometers, LVDT’s, and magnetostrictive sensors all at a reduced cost and higher mean time between failure (MTBF). Our inSight® Series of cylinders is now available with inSight® sensors completely integrated into any size of our D Series air cylinders. InSight® Series cylinders are able to provide position feedback in the same footprint as a normal D Series actuator. The inSight® sensor can also be purchased as a stand alone sensor for custom applications or even licensed for seamless integration into your own product line.


How Does the QVLA® Process Work?

Imagine two enclosed volumes, X and Y, of different sizes but with the same interior reflectivity. If these volumes are flooded with light by sources emitting the same quantity of light, the intensity of light measured within each of these volumes will be different. The larger volume X will have a lower measured light intensity than the smaller volume Y.


The disparity between measured light intensities inside each volume reveals the difference or change in volume, X-Y.
Bellows expansion and/or retraction, fluctuating fluid levels and mechanical movement of walls are all examples of volume changes measurable by the QVLA® Process.


Current Product: Insight® Air Cylinder

Technology Behind the Insight® Air Cylinder

QVLA® is a precise, repeatable and long lasting measurement system working on the simple principle of measuring light intensity within the air cylinder. As the piston moves more cylinder wall is available to absorb light thereby resulting in changing light intensities within the cylinder indicating rod extension.

iNSiGHT® replaces reed switches providing identical electronic outputs, easier set-up by a permanently attached keypad on the outside of the cylinder and can also be used for an end of stroke sensor. Unlike traditional switches, which can be run over with speed, iNSiGHT® establishes “end zones.” Once a position is tripped an “end zone” of switched electrical signal is established.

iNSiGHT® has no magnets or coils, extremely low electrical noise and is inherently wield field immune. It works with steel, aluminum or opaque composite structures.

iNSiGHT® Series cylinder is made in two footprints. The “Dprint” is our basic D Series cylinder line with 1.25″, 1.75″, 2″ and 2.5″ bore cylinders. The “Kprint” is our NFPA K Series cylinder with 1.5″, 2″, and 2.5″ bore cylinders. All typical mountings available.

9 foot cable standard.




  • Voltage 100V
  • Current 150mA
  • Isolation 1500Vrms
  • LED Indicators


  • Voltage Nominal 6-12V
  • Current ∼50mA
  • ISO protected
  • 5 Micron filtered clean air required
  • 120 max psi
  • No moving parts — No magnets
  • Easy set-up and calibration
  • 1.25″ to 2.5″ Bore currently available
  • Temperature compensated
  • Temp range -12C to +65C
  • Infinite resolution
  • Extremely long life > 5 million cycles
  • Steel or aluminum tubes
  • One year warranty
  • Repeatability .030″ to .001″ (dependent on stroke length)




  1. Press and hold for 2 seconds the yellow button corresponding to the position desired, either “Extend” or “Retract.”
  2. When the corresponding orange LED blinks, physically set rod at desired position.
  3. To finish, press the blue “SET” button.
  4. Complete!

Interested In Getting Started With An inSight Sensor?

Find a distributor near you to get more information on how you can implement inSight® into your products.