For high volume (>20,000 units) humidity sensing applications in automotive, appliance or electronic products. These sensors are designed for handling by surface mount assembly techniques utilizing a reflow soldering method. Their small size allow for an extremely small sensor footprint. The HC103-SMD version requires OEM calibration. The recently introduced HC104-SMD is calibrated via a Laser trimming process and does not require calibration by the OEM. ISO-9001 manufactured.