Very sensitive and with a useful range of upto 4m, these devices are commonly used in remote control devices (car / burglar alarms, robotics etc etc ) object detection and distance measurement. These are supplied as a pair, the receiver is marked with an 'R' on the underside and the transmitter is marked with an 'S'. Technical details we know are: Sensitivity: -62dB Sound Pressure: 120dB Directivity: 80 degrees Capacitance: 2500pF Max input voltage: (square wave p-p) 20V continuous, 40Khz Usable detectable range: 0.2m - 4.0m. This is the type used in many cars we understand Miniature plastic cased construction with 10mm connection pins extending from rear, diameter is 9.9mm and the height is 7.1mm. |
