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Advance-645 v1.1 $44.68US
2 - 6 : $42.44US ( save 5% )
7 - 19 : $40.21US ( save 10% )
20 + : $35.74US ( save 20% )
excl. sales tax

Create awareness of your surroundings. Ultrasonically senses distances of objects, persons, walls from 0.152 to 6.45 m (0.500 to 21.2 ft.). Is invisible to the audience. Completely silent to the human ear, hence it is suitable for sound installations.

Application examples

  1. Use for distance measurement relative to a wall or presence detection of objects and persons (it cannot detect the number of people present).
  2. Combine with a TapTiled floor, some MoveOn and/or ReachClose sensors and make sure every move of your visitor has an effect. The Flash + SeeLaser combo allows you to implement break-beams that could indicate borders or thresholds.

Technical specifications

Product Advance-645 sensor
Version 1.1 (May 2009)
Sensing parameter distance, proximity
Sensing method ultrasonic (42 KHz)
Active volume 36 to 50 cone (dependent on distance)
Range 0.152 to 6.45 m (0.500 to 21.2 ft.)
Resolution 2.5 cm (1.0 inch)
Update rate 20 Hz
m ft Voltage (use 5 V power supply) 7-bit MIDI value (use 'no processing' editor preset)
0.152 0.500 0 0
6.45 21.2 2.54 65
Operating temperature -40 to 85 C (-40 to 185 F)
Power supply 4.75 to 5.25 V DC, 2 mA
Sensor dimensions 20 x 22 x 16.4 mm (0.79 x 0.87 x 0.65 inch)
Weight 4.4 g (0.16 oz), incl. cable
Cable 5.0 m (16 ft), shielded, red wire = power, black wire = ground, white wire = sensor output, maximum extension ? m (? ft)
Connector male plug with a row of 3 pins 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).

Application notes
  1. upon power-up, the sensor performs a distance calibration, so if anything is closer than 35 cm (14 inch) it can cause close objects to be ignored
  2. multiple Advance-645 sensors can be placed adjacently where the spacing is determined by the maximum distance to be measured at which distance the ultrasound emission cones should not overlap
  3. any indirect echoes of the ultrasonic pulse (eg. from the sidewalls in a narrow corridor) may generate incorrect sensor output values

This page was updated on Sunday 02 October 2016.
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