A pressure transducer assembly that uses static pressure compensation to capture low-level dynamic pressures in high temperature environments. At least one lock assembly is disposed upon one of the sidewalls of the bed extender and includes a locking pin that operable to be selectively extended and retracted to engage with and disengage from the vehicle sidewall respectively. A fastening member passes through the first and second apertures coupling the first strap and the platform and thereby forming two separate passageways. An optimum cooling period is calculated by the control mechanism 35 based on the calculated water amount.