The minimum voltage for the sensor to start up is around 8 V. The nominal supply voltage is 12 V, so a DC-DC converter and a level shifter for the IO line is required.

The operating temperature range is between -40 °C to +85 °C. The functionality (max. distance) may be reduced at extreme temperatures.

The resolution depends on the circumstances and measurement environment. Under ideal conditions, an accuracy of about 4 mm can be reached but for most scenarios about 1 cm is to be expected.  

Object detection without distance measurement is possible up to 0 cm with one single module. Object detection with distance measurement up to 4 cm is possible using multiple ultrasonic sensor modules.

The speed of sound in air depends on the temperature and can be approximated as c = 331 m/s + 0.6 * T. Since the sensor's output signal is the time of flight, the temperature should be compensated.

Heavy rain, snow or dust deposited on the membrane surface can reduce the acoustic signal influencing the measurement capability. Light rain or snowfall does not affect the measurement.

The use of multiple ultrasonic sensor modules, triangulation, is possible.

Currently only black color is available.

As the module works with ultrasonic sound, a "clear" view on the target is required. Therefore it may not be placed behind a covering. 

During production TDK ensures excellent quality by measuring the impedance, coupling factors, and q-factors along with other specifications. At the final end-of-line test, the driving frequency, damping, and analog and digital gain factors are calibrated to ensure consistent echo detection. For even more accurate results, TDK recommends performing a final calibration of the sensor after assembly on the customer side (mainly the distance and echo height).

The sensors are shipped with a standard configuration that works well in most applications. For further customer-specific parametrization, please get in touch with us directly.