We are an industry with over 20 years of experience in the field of truck cargo security in Brazil. Currently, we are looking for an RFID reader for 125kHz TAGs that offers the lowest possible cost and can be used as a door opening sensor in truck trailers. The required reading distance is only 5 cm, and the reader's power supply must be 3.3V. The goal is to replace conventional door sensors, composed of reed switches and magnets, with a more durable and harder to tamper alternative (TAG+Reader). We can make the custom case to hold the RFID reader. It must witstand IP66 protection standard. The cost of the reader for this application is a critical factor. We would like to know if your company can supply this product. The annual consumption is 40, 000 units.