Albert F. Zwolinsky,Richard D. Marshall,Christopher G. Hall
申请号：
US15178717
公开号：
US10668307B2
申请日:
2016.06.10
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A safety breathing apparatus has a sensor for measuring the difference in pressure between two point in the gas delivered to a head unit. The sensor is used to measure the difference in the pressure of the gas supplied through the apparatus between the two points in the gas flow, and the pressure difference is then used to calculate the gas flow rate.
