SIEMENS PRODUCTS

Oil Flow Transmitter
Steam Flow Transmitter
DP flow transmitter
Ovalgear Flow meter
Venturi Flow meter
Annubar Flow transmitter
Paddle type Flow meter
Orifice type flowmeter
Water Flow transmitter
Air Flow transmitter
Gas Flow Transmitter
Acid Flow Transmitter
Chemical Flow Transmitter
Solid Flow Transmitter
Powder Flow Transmitter
flyash Flow Transmitter
Diesel Flow Transmitter
LPG Flow Transmitter
Honeywell Flow transmitter
Rosemount Flow transmitter
Yokogawa Flow transmitter
Krohne Flow transmitter
ABB Flow transmitter
Emerson Flow transmitter
Omega Flow transmitter
Vortex Flow transmitter
ElectromagneticFlow transmitter

Oil Flow sensor
Steam Flow sensor
Water Flow sensor
Air Flow sensor
Gas Flow sensor
Acid Flow sensor 
Chemical Flow sensor
Solid Flow sensor 
Powder Flow sensor
flysah Flow sensor
Diesel Flow sensor
LPG Flow sensor


An Orifice Meter is basically a type of flow meter used to measure the rate of flow of Liquid or Gas, especially Steam, using the Differential Pressure Measurement principle. It is mainly used for robust applications as it is known for its durability and is very economical.

As the name implies, it consists of an Orifice Plate which is the basic element of the instrument. When this Orifice Plate is placed in a line, a differential pressure is developed across the Orifice Plate. This pressure drop is linear and is in direct proportion to the flow-rate of the liquid or gas.

Since there is a drop in pressure, just like Turbine Flow meter, hence it is used where a drop in pressure or head loss is permissible.

An orifice meter is a conduit and a restriction to create a pressure drop. A nozzle, venturi or thin sharp edged orifice can be used as the flow restriction.

In order to use any of these devices for measurement it is necessary to empirically calibrate them. That is, pass a known volume through the meter and note the reading in order to provide a standard for measuring other quantities.

Due to the ease of duplicating and the simple construction, the thin sharp edged orifice has been adopted as a standard and extensive calibration work has been done so that it is widely accepted as a standard means of measuring fluids. Provided the standard mechanics of construction are followed no further calibration is required.

A linearly extending section of the same diameter as the inlet pipe for an end connection for an incoming flow connection. Here we measure the inlet pressure of the fluid / steam / gas.

An Orifice Plate is inserted in between the Inlet and Outlet Sections to create a pressure drop and thus measure the flow.

A linearly extending section similar to the Inlet section. Here also the diameter is the same as that of the outlet pipe for an end connection for an outgoing flow. Here we measure the Pressure of the media at this discharge.

As shown in the adjacent diagram, a gasket is used to seal the space between the Orifice Plate and the Flange surface, prevent leakage.

Sections 1 & 2 of the Orifice meter, are provided with an opening for attaching a differential pressure sensor (u-tube manometer,differential pressure indicator).

Siemens QBM2030-5 Differential Pressure Sensor is used to measure the slightest differential pressures variation in ventilation and air conditioning ducts, also Monitoring filters and control fans with output available in the device. The siemens pressure sensor acquires differential, over and under the pressure of air and nonaggressive gases.

Applications: This pressure sensor is widely used in HVAC applications for measuring the difference between positive and negative pressure. Measuring the smallest differential weights in ventilation and cooling channels, Pharmaceutical Clean Rooms, and AHU applications Check wind streams, Monitor channels, and control fans