A pressure gauge is an instrument used to measure the pressure of a fluid or gas. It is used to measure a system’s pressure, monitor it and ensure that it remains constant, and detect any changes in pressure.
There are two types of pressure gauges: differential and absolute. Differential pressure gauges measure the difference between two pressures and can be further subdivided into sub-range and wide-range gauges.
Absolute Pressure Gauges (APG) measure the total pressure of a system; they don’t give any readings based on another source of reference. An air pressure gauge is a simple way to monitor your air pressure.
Differential Pressure Gauge: A differential pressure gauge measures the difference in pressure between two points. It is generally used for measuring pressures within systems that have different pressures from one point to another.
A mechanical air pressure gauge from Zenith Instruments, this instrument is perfect for measuring differential pressures in a wide variety of applications.
This reliable, accurate and easy-to-use gauge can measure the pressure difference between two points as small as 0.001 inches of mercury using this handy digital gauge.
The air pressure gauge from Zenith Instruments is a digital, direct-reading instrument that measures air pressure from 0 to 500 kPa. The built-in LCD screen displays the pressure reading in both mm HG (water column) and mm Hg (mercury), while the backlit buttons allow you to choose between mm HG or mm Hg readings. The gauge operates with a nine-volt battery (included).
For example, if you have a boiler with high pressures in one part and low pressures in another, then a differential gauge would help measure these pressures and keep track of them.
Zenith Instruments is a premier manufacturer of air pressure gauges and instruments. Our products range from air pressure gauges and zenith air pressure indicators to zenith vacuum or pressure balances, zenith vacuum regulators, and much more. Whatever your application, Zenith Instruments has a calibration service to ensure the accuracy of your pressure gauges.
What is a Pressure Gauge?
A pressure gauge is an instrument used to measure the pressure of a fluid or gas. It is used to measure a system’s pressure, monitor it and ensure that it remains constant, and detect any changes in pressure.
Our range of pressure gauge calibration and testing services covers the needs of every industry. With an experienced team and state-of-the-art equipment, we can quickly tackle challenges such as vibration and temperature testing, pressure gauge calibration and performance verification.
What is the difference between a Differential and an Absolute Pressure Gauge?
A differential pressure gauge measures the difference in pressure between two points. As such, it is generally used for measuring pressures within systems that have different pressures from one point to another.
For example, if you have a boiler with high pressures in one part and low pressures in another, then a differential gauge would help measure these pressures and keep track of them.
We offer calibration services for pressure gauges, vacuum gauges, and manometers. Our experts are certified to calibrate pressure gauges in the following ranges:
Our range of pressure gauge calibration and testing services covers the needs of every industry. With an experienced team and state-of-the-art equipment, we can quickly tackle challenges such as vibration and temperature testing, pressure gauge calibration and performance verification.
On the other hand, an absolute pressure gauge measures a system’s total pressure; it doesn’t give any readings based on another reference source. With Zenith Instruments, you can be confident your pressure gauge is calibrated to the correct pressure. All our calibration services are completed by experienced engineers and calibrated to international standards.
As such, they are used to measure a system’s pressure and can detect any changes in that pressure. For example, an APG could be placed on a boiler to monitor if there is any steam leakage or if the boiler is producing too much steam.
How to Calibrate a Pressure Gauge?
A pressure gauge is used to measure the pressure of a fluid or gas. It is used to measure a system’s pressure, monitor it and ensure that it remains constant, and detect any changes in pressure.
There are two types of pressure gauges: differential and absolute.With several years of success in the pressure measurement industry, Zenith Instruments is a global leader in calibration services for all sectors.
Differential pressure gauges measure the difference between two pressures and can be further subdivided into sub-range and wide-range gauges. Absolute pressure gauges (APG) measure the absolute pressure of a system; they don’t give any readings based on another source of reference.
Zenith Instruments is the world leader in pressure gauge calibration. We offer various services, from on-site calibrations to phone consultations and email support.
What are the Steps for Calibrating a Differential Pressure Gauge?
Before you begin to calibrate your differential pressure gauge, it is essential to note that differential pressure gauges must be calibrated on at least a yearly basis.
This is because the accuracy of a differential pressure gauge deteriorates over time. This is because the measurements of the differential pressure gauge are based on the length of the column of mercury inside the gauge.
This column of mercury molecules shrinks over time, and this causes the accuracy of the gauge to decrease.
Step 1- Cleaning and Inspection: It is crucial to clean and inspect your differential pressure gauge before calibrating it for any damage. If you find that your gauge has been damaged, you should replace it immediately.
Step 2- Preparing the Pressure Gauge: Before you can begin to calibrate your gauge, you first must set it up properly. First, you must ensure that the gauge is turned off and unplugged.
Next, you must ensure that the pressure gauge is completely clean. You can use a soft cloth and some cleaning solution to do this.
Step 3- Setting Up the Gauge: Differential pressure gauges have two ports through which the pressure is measured. Before calibrating the indicator, you need to ensure that the ports are facing the right way. If you have installed the gauge incorrectly, the reading will not be accurate, so it is vital to check and ensure that the indicator is installed correctly.
Step 4- Connecting the Gauge: Once you have correctly set up your differential pressure gauge, you can begin calibrating it. To do this, you need to connect the indicator to the source of pressure that you wish to measure.
You can use a small piece of tubing to connect the indicator to the pressure source.Zenith Instruments offers a complete line of professional instrumentation for pressure gauge calibration, from precision pressure gauges to instruments that use standard reference gases and atmospheric pressure.
Calibrating an Absolute Pressure Gauge
It is essential to note that the Absolute pressure gauge (APG) must be calibrated yearly. This is because the accuracy of APG deteriorates over time.
Zenith Instruments has extensive experience in calibration services and standards, as well as in manufacturing accurate, precise, and durable products.
This is because the measurements of the APG are based on the length of the column of mercury inside the gauge. This column of mercury molecules shrinks over time, and this causes the accuracy of the gauge to decrease.
Step 1- Cleaning and Inspection: Before calibrating your differential pressure gauge, cleaning, and inspecting it for any damage is essential. If you find that your APG has been damaged, you should replace it immediately.
Step 2- Preparing the Pressure Gauge: Before you can begin to calibrate your gauge, you first must set it up properly. First, you must ensure that the gauge is turned off and unplugged.
Next, you need to make sure that the APG is completely clean. You can use a soft cloth and some cleaning solution to do this.
Step 3- Setting Up the Gauge: Differential pressure gauges have two ports through which the pressure is measured. Before calibrating the indicator, you need to ensure that the ports are facing the right way.
If you have installed the gauge incorrectly, the reading will not be accurate, so it is vital to check and ensure the indicator is installed correctly.
Step 4- Connecting the Gauge: Once you have correctly set up your APG, you can begin calibrating it. To do this, you need to connect the gauge to the source of pressure that you wish to measure.
You can use a small piece of tubing to connect the gauge to the pressure source.
Summing Up
Remember that a gauge is only as good as its calibration data. Calibrate your pressure gauge with a high-quality calibration source, preferably an industrial digital gauge.
Pressure is not the only gauge you need to keep on top of. You also mustensure that the indicator is calibrated for the correct temperature and that the right temperature is maintained during the calibration.
If you have a gauge calibrated for cold climate, it will not be able to read accurately when the temperature is close to freezing.Zenith Instruments offers a wide range of pressure gauge calibration services to ensure that all pressure gauges meet the required specifications.
If you only have a gauge calibrated for a warm climate, it will not be able to read accurately when the temperature falls below zero.
Your pressure gauge may be able to be calibrated for both a cold and warm climate if you have one. But if you have only one gauge, you need to choose the environment for which you would like the gauge to be calibrated.
The pressure gauge you choose to buy, or have calibrated, should have a digital readout, and display the pressure in both pounds per square inch and millibars.
If possible, choose a gauge that displays both inches and millimetres of mercury.Zenith Instruments is a leading manufacturer of pressure gauges, valves, and other process instrumentation. We offer pressure gauge calibration services for all types of commercial and industrial applications.