Best-in-Class Bandwidth and Dynamic Range

IC²’s DirectShear™ Sensing Systems enable non-intrusive, direct, simultaneous mean and fluctuating wall shear stress measurements.

DirectShear™ Sensors are robust, high-bandwidth, high-resolution, silicon-micromachined differential capacitive shear stress sensors for subsonic and transonic applications. This non-intrusive, design delivers an unprecedented degree of precision and accuracy for both mean and fluctuating wall shear-stress measurements.  This sensor system greatly extends the spatial and temporal resolution capabilities over existing devices, offering best-in-class bandwidth and dynamic range.

Originally developed for NASA, the capacitive sensors are now commercially available and are ideal for precise skin friction measurements in wind tunnels.

Product Description

The shear stress sensor die contains all backside electrical contacts for minimal flow disturbance.

Features

  • Micromachined floating element shear stress sensor that enables time-resolved, one-dimensional, direct shear stress measurements
  • Compact, robust sensor package for flush mounting
  • Optimized Sensor Control Unit (SCU) for high dynamic range and bandwidth
  • Suite of sensor models for different applications
  • Originally developed for NASA

Applications

  • Instrumentation-grade skin friction sensing
  • Aerodynamic drag research
  • Detection of flow separation
  • Wind tunnel instrumentation

Benefits

  • Direct measurement of shear stress — no heat transfer calibration
  • Non-intrusive — minimal flow disturbance
  • Simultaneous mean and fluctuating shear stress measurements
  • High resolution, dynamic range and bandwidth
  • Highly accurate, quantitative measurements

Prices start at $9995 per complete system.

Sensor Heads

The capacitive sensor head features backside contacts for minimal flow disturbance

The DirectShear™ sensor heads are micromachined, floating element devices that enable time-resolved, one-dimensional, direct mean and fluctuating wall shear stress measurements.

Key Features

  • Non-intrusive — backside contacts for minimal flow disturbance
  • Sensors are installed in a cylindrical stainless steel housing
  • Custom housings/materials available
  • Removable 6-pin shielded sensor cable
  • Shoulder and key for precision alignment
  • Suite of 6 sensor models available for different applications (see Specifications table)

Sensor Control Unit (SCU)

The DirectShear™ Sensor Control Unit (SCU) enables mean and fluctuating measurements when paired with a capacitive sensor.

The sensor control unit (SCU) is an integrated analog synchronous modulation/ demodulation system that enables mean and fluctuating measurements for a capacitive-based shear stress sensor. The SCU provides low-noise power and bias voltages to the sensor head and conditions the analog voltage signal for output to a DAQ.

Key Features

  • Mean and fluctuating capacitive sensor measurements
  • Selectable low-noise AC or rechargeable Li-ion battery power source
  • LED status indicators
  • 6-pin shielded sensor connector
  • Available in AC/DC, AC only models

Available DirectShear™ Models

Click model # for datasheet

10
0.75
2 x 0.5
100
0.1
50
1.5
2 x 0.4
40
0.1
100
2.5
2 x 0.4
10
1
300
5
1 x 0.2
1
1
1000
10
0.5 x 0.15
0.3
5
5000
20
0.5 x 0.15
0.08
10
Sensor Model
Shear Stress [Pa]
Bandwidth [kHz]
Element Size [mm] x [mm]
Sensitivity [mV/Pa]
Resolution [mPa]

Technical Resources and Documents

Brochures
DirectShear Sensors

DataSheets
CS-D10
CS-D50
CS-D100
CS-A05
CS-A10
CS-A20
SCU-100

 

Request a Quote or More Info

 

Contact Us