Ultrasonic Sensor Test

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The HE-US23X / HE-US33X was supplied with 11.5 volts, and a 1 millisecond 5 volt pulse was applied to the (transmit) black wire at 80 millisecond intervals. Objects were placed at given distance from the HE-US23X / HE-US33X, and the voltage resulting from the reflected wave, measured on the (receive) white wire.
Objects placed approximately 1.5 meters from the transducers, caused the following echo amplitude measured on the white wire, 9 milliseconds after transmission of the pulse.

The HE-US23X output noise level on the white wire was measured 6 millivolts (RMS).

Vp-p = Volts peak to peak. (RMS) = root mean square.

TEST I.
Object	Distance	Echo Amplitude
3.5" Diskette	1.5 meters (5')	5 Vp-p
Ballpoint Pen	1.5 meters (5')	2 Vp-p
Toothpick	1.5 meters (5')	0.6 Vp-p
Stainless steel nut, 6.4 mm (0.25") dia.	1.5 meters (5')	0.2 Vp-p

TEST II
Object	Distance 1	Echo Amplitude	Distance 2	Echo Amplitude
Aluminum Square Plate 1 x 1 m (3.3' x 3.3')	4 meters (13')	16 Vp-p	10 meters (33')	2.4 Vp-p
Aluminum Square Plate 10 x 10 mm (0.4" x 0.4")	2 meters (6.5')	0.18 Vp-p	4 meters (13')	0.04 Vp-p

Specification
Parameters @ 12V	Value	Units
Supply Voltage (Vcc) (Red Wire)	5 to 16	Volts
Quiescent Current Consumption	25	mA
Transmission Current	85	mA
Operation Angle (Beam Spread)	± 12	degrees
Bandwidth	± 2	Khz
Center Frequency	40	Khz
Range	0.1 to 20	meters
Digital Output Impedance (Brown Wire)	1.5	K ohm
Analog Output Impedance (White wire)	1.5	K ohm
Digital Input Impedance (black Wire)	10	K ohm
Transmission Sound Pressure Level (Vcc=12V)	115	dB
Reception Sensitivity (Vcc=12V)	7	dB/Ubar/v
Analog Output Noise Level	6	Vrms
Temperature	-20 to 80	°C
Max. Cable length (shielded)	100	meters
Max. Cable length (shielded)	328	ft

The HE-US23X was tested as follows:

The HE-US23X output noise level on the white wire was measured 6 millivolts (RMS).