A manometer (different from multimeters) is a device used for gauging pressure exerted in a fluid column. The device is typically U-shaped, cylindrical and handy in a way that is easily portable.
It has two arms with a liquid that rises when pressure acts upon it. The digital manometer is popular and is commonly used by technicians in the testing and measuring industries.
These days, many companies have specialized in making different kinds of manometers: specifically analog and digital manometers which makes it hard for buyers to choose the best manometer to suit their needs.
A manometer is commonly used to measure the pressure of gases and liquids. Besides, this guide will highlight the best digital manometers available on the market and explore important factors to consider when buying a digital manometer.
What is Digital Manometer?
The digital manometer is a pressure-measuring device that employs a transducer to convert pressure into corresponding voltage. So, what sets it apart from traditional analog manometers?
- Principle of operation: Unlike traditional manometers that use the columns of liquid to gauge and indicate pressure, digital manometer units leverage a pressure transducer and internal microprocessor to indicate pressure changes.
- Ease of use: The straightforward construction and simple use make it easier to take readings in almost any place. Unlike traditional manometers, the accuracy doesn’t depend on a level surface.
- Easy to carry around: Digital manometers can be used on the go thanks to their compact design and great portability.
- Digital readings: As the name suggests, the pressure measurements – either positive or negative – are displayed digitally on an LCD screen. These are typically expressed in pounds per square inch (PSI), but some readouts may include pressure units like millibars (mbar) or pascal (Pa).
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Comparing The 5 Best Digital Manometers
|Field Piece Dual-Port Manometer – SDMN5|
|UEI Test Instruments EM152 Dual Differential Digital Manometer|
|RISEPRO Digital Manometer|
|Rupse hand –Held HT-1890 Manometer|
|Perfect Prime AR1890 Professional Digital Air Pressure Manometer|
1. Field Piece Dual-Port Manometer – Designed for HVAC/R Technicians
The SDMN5 features a zero adjust button on the face of the meter, a sturdy rubber boot, and a magnet at the rear, which helps in hanging the manometer during service. In addition, it has the Auto-Off function that helps in conserving battery life.
The manometer measures pressure ranging from -60inWC to 60inWC and -150.0 to 150.0 mBar. It also measures pressure at two points (point 1 and point 2) and then calculates the pressure difference between the two points.
You can also use the resolution mode of either 0.01mBar or 0.01inWC to take static pressure measurements. The manometer comes with an adapter, usually measuring between 3/16 inches to 5/16 inches, as an add-on. The adapter is used to measure inlet and outlet gas pressures.
- Easy to use
- Very accurate
2. UEi Test Instruments EM152 Dual Differential Digital Manometer – Best Dual Input Device
The manometer features a zero adjust button on the face of the meter, and a magnet mount at the rear, which helps in hanging the manometer during service. In addition, it has the Auto-ranging and a data-holding feature that helps in determining the ideal data to hold in different ranges of pressure.
It comes with a flexible, fine, transparent, silicone tubing, 2-barbed gas valve fitting, a soft pouch a manual and lithium battery of 9V. All these inclusive components work hand in hand to make it easy when measuring.
The manometer measures pressure in 11 scales; PSI, mBar, PSI, inh20, Oz in, kgcm, cmh2o, kpa, inhg, bar and mmhg.
- God quality
- Easy to use and read
- Reports of a slow clock
3. RISEPRO Digital Air Pressure Meter and Differential Pressure Gauge Manometer – All-Rounder
If you are looking for a digital manometer to use for pneumatic controls, gas appliances, medical purposes, laboratory testing, gas appliances installation, and repair or even HVAC industry then this is your device of choice.
The manometer use the 11 selectable scales units (FtH2O, mmHg, inHg, Psi, inH2O, KGCM2, cmH2O, mBar, Bar among others). It measures pressure ranging from ±13.79kPa/±55.4H2O/±2 psi
In addition, the device comes along with two pairs of tubing, an instruction manual, a carrying pouch, and a Barv Access Fitting. These accessories will make the device easy to use during installation, use, and portability purposes
- Easy to read and use
- High quality
- Not very accurate for HVAC
4. Rupse Hand –Held HT-1890 Manometer – Best for Ventilation & Air Conditioning Systemair conditioning systems, and ventilations. The device can also be used for corrective maintenance of gas pressure system.
The manometer is made with a nice backlit LCD display system that offers clear reading when in use and makes the whole operation simple.
Just like most manometers, this device is used to measure differential pressure and is scalable to 11 units; kgcm², ftH2O, inH2O, bar, psi, kpa, inHg, mmHg, mbar, ozin², cmH2O.
The device can be used to test pressure in gas appliances installation and repair, pneumatic controls, HVAC, medical equipment, computer peripherals, and laboratory testing.
The manometer comes in a package with 2 soft plastic tubes, 2 hard plastic hoses, a pressure connector, a cloth bag, a 9V battery and a user manual. These accessories work together to create an easy installation process that is easy to use.
- Simple and easy to use
- Very accurate
- Nice display
- Cannot be calibrated
5. Perfect Prime AR1890 Professional Digital Air Pressure Manometer – Best for High Accuracy
The device has a high recording accuracy of ±0.3% FSO in full scale. It has a maximum pressure rating at 10psi and will show error message code (Err1) when the rate is exceeded. The under range indicator will show ‘Err2’ code message on the screen.
It comes with 2 pairs of tubing, a barb access fitting, a soft pouch, and an instruction manual. The accessories are essential during installation and every time you operate the device. The manometer has a large LCD backlight that makes it easy to read and operate it.
Additionally, the device has zero adjust and offset functions and auto power with each playing an important role. The zero adjusts helps you reset your manometer. The offset helps you determine the balance while an auto off will switch the manometer off.
- A variety of scales
- Large LCD for easy reading and operating
- Can be used for various differential pressures
- Cannot read high pressure
How Does a Digital Manometer Work?
The manometer is meant to measure the difference in liquid or air pressure, depending on intension, by comparing the weight of fluid or gas between two pressures.
The differential pressure is usually compared to the surrounding Earth’s atmosphere – an outside source. Manometers operate on a principle of fluid displacement employing hydrostatic balance.
Once the liquid balance is achieved, the applied pressure is represented as the difference in height of the liquid. That principle is reproduced electronically in digital manometers.
Digital Manometer Applications
Digital manometers offer a full suite of applications. For instance, they are used for medical procedures, atmospheric surveys, gas analyses, weather studies, and so on.
Before investing in a digital manometer, you should know exactly what you’ll be using it for. Do you need it for a school laboratory or for personal needs to monitor appliances at home? Also, you need to ask yourself whether you’re going to measure gas or fluid.
The following are some applications of digital manometers:
- Process instrumentation jobs: Calibration of pressure transmitter
- Industrial processes: Quenching and heat treating
- Plant processes: testing of pressure switches
- Plastics manufacturing: Measuring the vacuum in various resin reactors
- Gas utilities: Testing of positive displacement meter
- For flow measurement machines: Monitoring the vacuum or flow rate of gases
- For filters, chillers, and condensers: Detecting blockages
What are the Features of the Best Digital Manometers?
Whether you are an expert working at a weather station or home user, a manometer can be a priceless piece of equipment as long as you choose the right one. To end up with the best digital manometer, you should take a closer look at the features included.
Here are some key features to consider:
- Power Source
- External casing
Analog vs Digital Manometers: Most Common Issues People Have with Traditional Analog Manometers?
Here are some disadvantages of traditional manometers that can make you think about switching to their digital counterparts:
- Inaccuracy: Analog manometers are unsuitable for applications that require optimal precision. This is the most serious drawback of analog manometers. The reason for error usually lies in the inaccurate mechanics of the device.
- Limited application: Analog manometers can’t be employed in locations where vibrations are common given that their accuracy depends on a level surface. Since their displays aren’t lit in most cases, they can’t be used in low-light conditions.
- Robustness: In general, traditional manometers are larger than digital ones, which takes a toll on portability.
- Advanced features: Analog multimeters lack many features that can be found in top-of-the-line digital models. For example, they are not capable of recording their interface and data with computers.
Factors to Consider When Buying a Digital Monometer
Before you go to the market, always consider what you will use your manometer for. This will help determine the ideal one that will serve your needs. Outlined below are other important factors you will need to consider before finally buying a digital manometer though.
Construction and Design
Most digital manometers are constructed in almost a similar ergonomic design. They have a dual port on the top, a magnet at the rear, an LCD display on the front with the zero buttons slightly below the display.
They are usually small and light in weight and this design makes them easily portable.
However, it is good to note that some features differ in terms of size. The size of the LCD display varies from one digital manometer to another. Some have a widescreen, which is advantageous because you will not have to worry about straining to read the digits that appear. Some are small but equally enough.
Features of An Ideal Manometer
Digital manometers have many features in common. They are handy and portable devices usually of small sizes and very light in weight. In fact, their weight can be measured in ounces. This makes them very easy to carry around.
Common features of any digital manometer are; a display (mostly LCD) that shows the results, the 11-scale unit that measures weight in different forms, a magnet that helps to hang the meter and a zero adjust button that resets your device.
Almost all digital manometers use the 9-Voltage lithium battery. All the 5 manometers listed in this guideline use the 9V Lithium battery.
To be specific, the lithium battery is fitted with all the devices bar one manometer (Perfect Prime AR1890 Professional Digital Air Pressure Manometer) which requires you to purchase the battery separately.
Performance refers to the accuracy and the number of tasks a manometer can execute. Different manometers have different accuracy levels and different tasks that they do when measuring pressure.
Most digital manometers have an accuracy ranging from ±0.01inWC or 0.01mBar to ±0.003mBar (highest to lowest). These statistics, however, show that most of the digital manometers are accurate while the most accurate ones stand at ±0.01inWC
In terms of tasks, most digital manometers are generally used in the most common area of application, which includes: in HVAC, pneumatic controls, gas appliances, medical purposes, laboratory testing, gas appliances installation and repair.
The best digital manometers have a high performance. They will let you do your measuring job without having to worry about accuracy and the tasks they are capable of doing.
User ability refers to the ease of use of a manometer. User-ability usually depends on the features that accompany the manometer. The features that are incorporated in the digital manometers make them easy to use.
Almost all digital manometers have an LCD display that helps you to read your measurements clearly. The lightweight design of manometers makes it easy for you to carry, hence, easily portable. The 11-scale unit measures weight in different forms. The magnet helps to hang the meter and a zero-adjust button assists in resetting your device back to zero.
However, there is a slight difference among the manometers in terms of size of the display, weight, and even the size of the manometers in general. Manometers with a relatively larger display are easy to use. They will let you read your results on the display without straining your eyes.
Ready To Buy The Best Digital Manometer?
The measurement of pressure is as old as time. The manometer, simple and precise, is one of the oldest ways to measure the pressure of gases and fluids. Getting the right gas or liquid pressure measurement is basically dependent on the kind manometer you will use.
Hence, you need to choose a digital manometer with high accuracy and an excellent LCD. These types of manometers, will not only give you accurate pressure readings but will also offer a nice display that is easy to read the results.
The most important thing to consider when buying a digital manometer is its performance and ease of use. The construction and design plus features and the accessories that come along with them do not largely differ.
That said, you should get a digital manometer that meets your demands, has a considerable warranty, and is affordable.
Which of the 5 digital manometers on this list do you think is your favorite?
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They typically come with a connection to inflate car tires and a needle adapter to inflate basketballs, footballs, and so on. Modern cordless air compressors are powered by a rechargeable battery.
Share your thoughts in the comment section below!
Samuel Vose says
can I use the perfect prime one (#5) to measure the static pressure of a radiator fan? Any help would be greatly appreciated.