Ultrasound parts

TCT40-16R/T

• Product Name : Ultrasonic Transducer;Model No. : TCT40-16R/T;Max. Input Voltage : 20Vrms

• Center Frequency : 40KHz;Sound Pressure Level : 65dB;Receiving Sensitivity : ≥-65dB (40KHz)
• Operating Temperature : -20C to 70C;Body Size(Each) : 16 X 12mm/ 0.61" x 0.47" (D*L)

Reference
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http://www.ktu.lt/ultra/journal/pdf_50_1/50-2004-Vol.1_09-A.Vladisauskas.pdf
http://www.firstsignal.com/outcomes/outcome-tools/real-time-location-tracking-rtls/