Single axis accelerometer with inertial threshold

A single axis accelerometer comprising:

• a frame, a swing arm, a sensor, a printed circuit board (PCB), a stop, and a threshold setting device wherein:
• the swing arm comprises a proximal segment connected to the frame through a pivoting connection allowing the swing arm to swing around a pivot axis and a distal segment comprising a sensor trigger and a threshold engagement element;
• wherein:
• the stop is positioned to block the distal segment of the swing arm from swinging in a first direction;
• the sensor is positioned to be engaged by the sensor trigger when the distal segment of the swing arm swings in a second direction, opposite the first direction;
• the PCB communicates with the sensor and is configured to convey sensor data from the sensor to a receiving device;
• the threshold setting device is positioned in apposition to the stop and the threshold engagement element when the distal segment of the swing arm is in contact with the stop;
• an interaction between the threshold engagement element and the threshold setting device applies a threshold force in the first direction to the distal segment of the swing arm.