SR04 ultrasonic module for outdoor use

[Moonwalker031]

I've been looking for (cheap) outdoor ultrasonic sensors but could not find any assembled in a module (except Maxbotix which are out of budget).
So I am thinking if changing the transducers on the SR04 module to waterproof type might work. Any feedback is welcome.

My application is for a trip alarm sensor to be used outdoors and possibly having a narrow angle as possible.

 

[Strong]

http://www.digikey.com/product-sear...onic-receivers-transmitters/1966682?k=sensors

Walt

 

[pcbman]

Moonwalker031, I understand that you need a narrow angle ultrasonic sensor in low budget but I highly doubt you’ll get a reliable one. I recently made such a trip-sensor for outdoors using laser beams which produce an interrupt when the beam is cut. The range was 250m which is quite a lot considering the fact that it uses less power as compared to ultrasonic sensors.

Regards,
Levent Caliskan

http://blog.7pcb.com

 

[Moonwalker031]

Thanks for your help m8. I have a similar one using IR led with a range of about 20m. I tried using a laser but focusing it was a headache and so used the IR LED.

However this time I cannot use a reflector so am testing Ultrasonic.