Tensimeter is a blood pressure gauge, how to use it very easy to use ordinary doctors, nurses. measuring blood pressure can in some measure a standard or normal. if the normal size 120/80 for an adult 17 years or older. how to read is 120 for blood pressure above and below 80 for readings. centimeter some form or sort of tension or Amron digital meters, but their role as digital if we round it off the existing value.