Which of these statements about air bag sensors is not true?

Explanation
Reference:

Young, R. A., & Schreiner, C. (2009). Real‐world personal conversations using a hands‐free embedded wireless device while driving: Effect on airbag‐deployment crash rates. Risk Analysis: An International Journal, 29(2), 187-204.

White, J., Thompson, C., Turner, H., Dougherty, B., & Schmidt, D. C. (2011). Wreckwatch: Automatic traffic accident detection and notification with smartphones. Mobile Networks and Applications, 16(3), 285-303.

Woo, J., Jo, S. H., Byun, G. S., Kwon, B. S., & Jeong, J. H. (2021). Wearable Airbag System for Real-Time Bicycle Rider Accident Recognition by Orthogonal Convolutional Neural Network (O-CNN) Model. Electronics, 10(12), 1423.

Answer
b. Mass-type sensors rely on a ball and a magnet. The circuit is complete when the ball makes contacts with the electrical contacts in the sensor.

An electrical contactor switch employs a secondary, low-voltage power source to complete or interrupt circuits. Instead of short-circuiting circuit breakers, they handle larger circuit loads and connect directly to high-voltage supplies. MAFs (mass flow sensors) measure the flow of air into a fuel-injected internal combustion engine. Each contact is a conductive material, such as metal, which is frequently used. Contact surfaces are often made of metal alloys like silver or gold, which have excellent electrical conductivity and other qualities like wear resistance, oxidation resistance, and corrosion resistance.

This data is required by the engine control unit (ECU) for the ECU to balance and distribute gasoline to the engine properly. Temperature and pressure alter the density of air. Automotive applications use mass flow sensors rather than volumetric flow sensors to determine the amount of air intake in each cylinder since the density of air changes with temperature, altitude, and the usage of forced induction.