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Ultrasonic Proximity Switches 

  • Low Power Consumption

  • Low Cost $42 in hundreds

  •  Size (50 x 50 x 23 mm)

HXS series is a low cost switch USD 42 in hundreds. It uses a wide beam transceiver, and is therefore less sensitive to the orientation of the object tripping the switch. When the object comes within a given distance (see table below) from the device the brown wire goes from off state 0 v to an on state (Vsupply). This device is capable of sourcing 100mA on the brown wire to a voltage level of 0.2 Volts. The table below is a general selection guide, if you don't find a device that suits your application, let us know we can change the parameters.

 

ABSOLUTE MAXIMUM RATINGS

Ambient temperature during operation

-40°C to +125°C

Storage temperature

-65°C to +150°C

Voltage on the Brown wire 

-0.3V to (Vsupply + 0.3V)

Voltage on the Red wire with respect to the black wire 

-0.3V to +5.5V

Maximum current out of Black Wire

300 mA

Maximum current into the Red Wire

250 mA

Wire Configuration

Wire Color Function
Red Vsupply (power in 3 to 5.5 V)
Brown  ON : 0.8*Vcc @ 100mA .... OFF: 0.2*Vcc@-100mA     Vcc=5.5V
Black Gnd (return)

* WARNING if you reverse polarize the device or violate the absolute maximum ratings the device can be damaged.

The illustration below shows how the HXSW switch series can be used to drive LEDs and Relays. When the distance D equals the distance specified in the table below (D=Switch Distance) then the logic level of the brown wire switches from 0 to Vcc or from the voltage level on the black wire to the voltage level on the red wire. If an object that has tripped the switch retracts to Switch Distance + Hysteresis then the voltage level on the brown wire becomes 0 or equal to that on the black wire.

For example HXS101 has switch distance equal to 1m and hysteresis equal to 0.1m therefore
D = 1m brown wire turns on
D = 1.1m brown wire turns off  

 

Beam Pattern

The sensor is located in the locus of the polar plot shown below facing north, maximum signal strength is along the 0 degree axis. As the observer with the measuring instruments moves east and west i.e. perpendicular to the 0 line signal strength degrades. The beam pattern character line shown below represents observation angles where signal has degraded by 6 decibels. 

 

 

Selection guide

Part No. Switch Distance Hysteresis Response Supply Consumption *
HXS101R5 1.0 (meter) 0.1 (meter) 500 mS 3.0 - 5.5 volt 20 - 40 mA
HXS505R5 0.5 (meter) 0.05 (meter) 500 mS 3.0 - 5.5 volt 20 - 40 mA
HXS202R5 0.3 (meter) 0.03 (meter) 500 mS 3.0 - 5.5 volt 20 - 40 mA
HXS101R20 1.0 (meter) 0.1 (meter) 2000 mS 3.0 - 5.5 volt 5 - 10 mA
HXS505R20 0.5 (meter) 0.05 (meter) 2000 mS 3.0 - 5.5 volt 5 - 10 mA
HXS202R20 0.3 (meter) 0.03 (meter) 2000 mS 3.0 - 5.5 volt 5 - 10 mA

* Power consumption is measured with the brown wire open (not connected)

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Copyright © 1999 [Hexamite]. All rights reserved. Revised: January 07, 2008 .

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