HarmonyOS onTouch中，按压值是pressure吗？值范围是多少

.onTouch((event?: TouchEvent) => {
  if (event) {
    //实际的坐标
    let x = event.touches[0].x;
    let y = event.touches[0].y;
    let pressure = event.pressure; //按压值
  }})

得到的值总是这样的：

0.008682383224368095
0.008682383224368095
0.008880751207470894
0.008880751207470894
0.00881971511989832
0.008804455399513245
0.00860608834773302
0.008545052260160446
0.007797360420227051
0.007797360420227051