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What are the implications of using a 32 KHz vs. a 40 kHz sensor ?

April 26, 2017implications kHz sensor vs

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What are the implications of using a 32 KHz vs. a 40 kHz sensor ?

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The 32 kHz version has broader bandpass than the 40KHz and will pick up some 40KHz. For better separability, you can excite the 32KHz with a lower frequency, maybe as low as 28KHz ( I have not tried though). The detector lens is the same.