Flex Sensor Array

Sensor Arrays for FHE Applications

Sensor Arrays for FHE Applications

Brewer Science FHE flex arrays deliver highly sensitive, drift-free, and real-time responses to varying angles of deflection.

The flexible hybrid electronics (FHE)-based flex arrays are a revolutionary approach to using carbon-based semiconductor technology to solve problems with existing flex sensor technologies. The array is a flexible solution to prevent false/positive signal creep while still collecting data, even during a continuous bent state. Our custom designs and printing methods allow FHE flex arrays to be a fully digital, ready-to-incorporate solution to your unique system or needs.

What are Flex Sensors?

Flex sensors, also known as bend sensors, measure the bend, or deflection, of an object. Flex sensors are used by measuring the resistance of the sensor’s elements.

How Flex Sensors Work

When the flex sensor array is bent forwards or backwards, particles in the active layer move closer together, decreasing resistance, or move further apart, increasing resistance. When the sensor straightens out again, the resistance returns to the original value. Measuring the resistance can determine how much the sensor is being bent.

Why FHE Flex Arrays?

Flex Sensor Robot
Resistive-based flex sensors are used to measure the flexing or bending of an object with little to no effort. Due to its unique form factor, FHE flex arrays are light-weight and are great for measuring bi-directional bend in confinded spaces. The array creates a fully digital output that is IoT plug-and-play ready. This gives the user endless opportunities for integrating into a variety of numerous applications where multiple sensors are needed in a small space and analyzed by the digital microcontroller.

Benefits of FHE Flex Arrays

  • Bi-directional
  • Linear response to bend
  • Higher gauge factor than commercial metal strain guage
  • Instantaneous response to bend (<10 ms); ideal for vibration detection
  • No resistance drift over time
  • Highly sensitive to strain (0.001%)
  • Linear response to bend


Parameters Performance
Flat resistance value (25˚C) 30,000 to 50,000 Ω
Resistance tolerance ± 20%
Bend sensitivity 900 to 2,600 ppm/˚bend
Bend relaxation (-180˚ to 180˚) 0.3% to 1.3%

Potential Applications

  • Structural health monitoring
  • Vibration
  • IoT and wearables
  • Flow monitoring
  • Virtual and augmented reality
  • Robotics and automation
  • Building and structure monitoring
  • Hinge point measurement