HC-SR04 Measurement Sensor Outdoor


I would like to use HC-sr04 ultrasonic distance measurement sensor in outdoor environment. Does it possible to remove transmitter and receiver and substitute with water resistant transmitter and receiver? Like these : http://www.dx.com/p/lson-water-resistant-ultrasonic-40khz-sensor-ranging-probes-silver-4-pcs-309162#.VAHBi2Mx9e4

Thanks in Advance,

You would need the data sheet for the sensor and transmitter on the HC=04 to be able to compare the specs. It may be easier to find a rangefinder like used in automobile back up alarms that is made to be use in harsh outdoor environments.