basics

2. MNS UET MULTAN
Presented By ; Abdul Hannan
Mhammad Saad
2016-2020
Semester 4th
Presented To; Eng Zahid Iqbal
Topic ; Differential Manometer
Department of Mechanical Engineering Technology

3.  Pressure measuring.

4.  Measure difference in pressure between two
places.

5.  h = (p1 - p2) ρ g
ρ = density of the
liquid used in
manometer.
ρg = specific weight
of the liquid.

7.  U-tube manometer
 Single column/Micro manometer
 Well type manometer
 Inclined tube manometer
 Ring type manometer

8.  Accuracy in Liquid Manometers.
a) U-tube type:
+/- ½ of minor scale graduation.

9. b) Well type:
+/- ½ of minor scale graduation.

10. c) Inclined type:
+/- ½ of minor scale graduation.

11.  Accuracy in Digital Manometers
a) General purpose:
+/- 0.025 - 0.1% F.S
b) Calibrating:
+/- 0.025 - 0.1% F.S.

13.  PA - PB = g × h (ρg - ρ1)
where, h = difference in mercury level in the U-tube
ρg = density of heavy liquid
ρ1 = density of liquid A.

14.  Used in the maintenance of heating, ventilation, and air
conditioning (HVAC) systems, low pressure pneumatic or
gas systems.
 Construction of bridges, installing swimming pools and
other engineering applications.
 Climate forecasting.
 Piezometer are used to measure the pressure in pipes
where the liquid is in motion.

15.  Sphygmomanometer
Type of manometer, is
commonly used to check blood
pressure in humans. Systolic
pressure reading is the mercury
reading on the pressure gauge
when the pulse is first heard,
while diastolic pressure reading
is when the pulse can first no
longer be heard

16. END.