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TouchMini v1.2 (obsolete)

A small, round touch sensor. Contact pressure provides continuous control. Responds to pressure from approx. 4 KPa (0.04 Kg/cm2, 0.6 PSI) to 981 KPa (10.0 Kg/cm2, 142 PSI) or a force of approx. 0.6 N (60 g, 0.13 lb) upto 98 N (10 Kg, 22 lb) that's evenly applied across its active area, a 13 mm (0.51 inch) diameter disk. View, calibrate, record and map the sensor data using our TouchSensors software (see below). If you are just looking for a button check the TouchMiniOn.

And look, it's part of a family. Here are all the versions we have available (note that some of these sensors have a different response curve):

Application examples

  1. Use as a touch sensor for a synthesizer.
  2. Can be easily worn or applied to a variety of flat surfaces. Blow Laurie Anderson, Marillion and others away. Trigger those samples!
  3. May be used to design your own fretless bass. Use for capturing slaps while the Slide-500 functions as your pitch controller. A GForce3D will help you accentuate your tones when you move the stem upright.
  4. Can be used in your custom wind instrument design. Use for buttons, while using a Slide-100 for octave control and a GForce3D to capture body movements.
  5. Create a fancy control panel by combining Push sensors (Push, Push2D), Reach sensors (Reach, ReachClose), Slide sensors (eg. Slide-50, Slide-200, Slide-500, SlideRound, SlideWide), Touch sensors (see above) and Turn sensors to name a few.

Technical specifications

Product TouchMini sensor
Version 1.2 (March 2008)
Sensing parameter contact pressure or force
Sensing technology zero-travel force sensitive resistor
Active area 13 mm (0.51 inch) diameter disk
Range approx. 4 KPa (0.04 Kg/cm2, 0.6 PSI) to 981 KPa (10.0 Kg/cm2, 142 PSI) or
across 0.6 N (60 g, 0.13 lb) to 98 N (10 Kg, 22 lb), evenly applied across active area
Repeatability 5% (max) for one sensor, 25% (max) across multiple sensors
Response time 1 to 2 ms (mechanical)
Output resistance more than 100 KOhm (at 0 N) to 200 Ohm (at 98 N) in parallel with 47 KOhm
Calibration (force applied evenly across active area)
N Kg lb Voltage (use 5 V power supply) 7-bit MIDI value (use 'no processing' editor preset)
0 0 0 0.00 0
0.98 0.1 0.22 1.54 39
9.8 1 2.2 4.72 120
98 10 22 5.00 127
Calibration (force applied per unit of active area)
KPa PSI Voltage (use 5 V power supply) 7-bit MIDI value (use 'no processing' editor preset)
0 0 0.00 0
7.58 1.10 1.54 39
75.8 11.0 4.72 120
758 110 5.00 127
Power supply 1.0 to 10 V DC, 0.1 mA at 5 V
Operating temperature -20° to 100° C (-4° to 212° F)
Sensor dimensions 19 mm (0.75 inch) diameter x 0.5 mm (0.02 inch) thick disk
Weight 15 g (0.5 oz), incl. cable
Cable 1.0 m (39 inch), shielded, red wire = power, black wire = ground, white wire = sensor output, maximum extension 30 m (98 ft)
Connector male plug with 3 pins in a row spaced 2.54 mm (0.100 inch)
Software support

  1. 09 Dec 2014: SensorX v1.00 for MacOS and Windows (64bit, contact us for the 32bit version) from source code in Max. For multiple sensors or sensor outputs, run multiple instances of the application, each started in its own folder. Use together with Connect (MacOS / Windows) or BlueMIDI (Windows).
  2. 08 Dec 2010: TouchSensors v1.11 for MacOS and Windows from source code in Max.

Application notes
  1. Please note that calibration of the sensor requires careful attention to detail since they behave differently near the extremes of the usable range. The sensor behaves as a force sensor within the specified range but may not behave like a force sensor beyond this range. It is merely documented as a saturation effect above the range, meaning that sensitivity changes with force, and as a threshold effect below the range, which behaviour may be hard to repeat or even random.
  2. To obtain reliable results, the force has to be applied evenly across the active surface area of the sensor. Using a finger to calibrate or to measure how much force you exert is very unreliable unless you at least use a flat rigid object between the finger and the sensor.
  3. If the sensor shows a non-zero value when no force is applied, flatten the sensor between two flat objects for a few days. Any bending of the sensor may result in a non-zero at-rest value. Store sensor in flat position for best results.
  4. Using adhesive to attach the sensor may result in a non-zero value when no force is applied

This page was updated on Tuesday 11 July 2017.
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