Differential Pressure Plus Inc.

Differential Pressure Plus Inc.

A leader in the manufacturing of differential pressure gauges. The First Family of Differential Pres

Differential Pressure Plus has been designing and manufacturing differential pressure gauges since 1991. We are located on the Long Island Sound in the town of Branford, CT and have customers located in every part of the globe. Our specialty is customization and rapid prototyping for the most unique applications of differential pressure. However, we also maintain the ability to handle large quan

Timeline photos 02/27/2020

The new CDG series has 270 degrees of pointer motion compared to the normal 110 for most dp gauges. This capability is is usually seen on designs that cost $1,000+! Contact us today to see how much you could save by outfitting your equipment with this newly patented design.

Compress Air with No Moving Parts! - Trompe 02/05/2020

Learn about the unique air compressor system known as a Trompe in the recent episode of Practical Engineering: https://youtu.be/uvf0lD5xzH0

Compress Air with No Moving Parts! - Trompe A brief overview of this ingenious method of compressing air using only the power of water. Explore your creativity and get 2 free months of Skillshare premi...

Timeline photos 02/05/2020

Check out youtube channel to learn more about a unique air compressing method called trompe. You’ll get to see one of our LDG gauges in action!

Timeline photos 01/16/2020

Our PG series of differential pressure gauges can be machined from aluminum, brass, or 316 stainless. You can also choose from either buna, epdm, or viton for your o-ring seals.

Timeline photos 12/18/2019

Plumbing up a Purigauge on your filter system is easy. The design has integrated push connect fittings so you can say goodbye to leaking NPT threads!

Timeline photos 12/17/2019

Did you know we can print colored segments on our gauge dials? It’s a great future for filter systems and makes sure you don’t forget the changeout pressure! Christmas tree not an available accessory.

Timeline photos 12/10/2019

Matt’s getting some of our new Purigauges ready for a customer in Europe!

Timeline photos 12/10/2019

We may supply some of the biggest names in manufacturing, but will always remain a small business at heart. Each filter status indicator is hand assemble and individually tested here in Branford, CT.

Timeline photos 12/10/2019

Getting in the holiday spirit!

Timeline photos 10/29/2019

What’s the status of your water filter cartridge? Stop forgetting and add a Purigauge! You can get them on amazon or direct from our manufacturing headquarters in the USA.

Timeline photos 10/09/2019

The Purigauge’s push-fit connections make it easy to integrate bleed off valves for easy cartridge changes.

Timeline photos 10/04/2019

The DG is one of the most capable liquid level gauges in the industry. From micro to bulk storage, it’s an ideal gauge for checking liquid level in your cryogenic tank.


It’s always exciting to see how customers use our gauges. Check out this DG series monitoring a massive cryogenic storage tank.

Timeline photos 10/03/2019

We’re out in the Midwest this week stopping by a few manufacturers using our gauges. This is a cryogenic microbulk storage tank.

Timeline photos 10/02/2019

One of our differential pressure gauges got featured in ! Check it out on Youtube by searching “what is cavitation.” Thanks Grady!

Photos from Differential Pressure Plus Inc.'s post 10/01/2019

The DPP975 filter status indicator features dual dials. This allows technicians to easily install them in either flow direction. @ Differential Pressure Plus Inc.

Timeline photos 10/01/2019

How do you monitor your filter systems? Our new Purigauge features John Guest push-connect fittings and provides great feedback.


One of our engineers has a motorcycle that needed its carbs balanced. It turns out our gauges are a perfect tool for this. Is this a product we should make?!

What is Cavitation? (with AvE) 06/27/2018

Check out this great video from Practical Engineering! He overviews cavitation and used one of our new filterSHIELD series gauges to monitor the differential pressure:


What is Cavitation? (with AvE) The basics of fluid cavitation, including demonstration from AvE. First 100 people get $50 off their first two weeks of Blue Apron, here: https://cook.ba/2te...


Happy Thanksgiving! As a follow up to our "Mashed Potatoes Recipe" video, we put together a behind the scenes video explaining how we designed and built the cannon. Make sure to subscribe to our YouTube channel to keep in the loop with other upcoming projects.

YouTube Channel: http://bit.ly/2zZczp4
Website: https://differentialpressure.com/


Part 1/2 of how to install one of our gauges using the large filter vessel bracket kit. Each package comes with the gauge, precut tubing with high quality swivel fittings, and quick adjusting straps.


Part 1/2 of how to install one of our gauges using the large filter vessel bracket kit. Each package comes with the gauge, precut tubing with high quality swivel fittings, and quick adjusting straps.

Timeline photos 04/26/2017

Monitoring industrial filtration systems doesn't have to be complicated. The 200DPG piston differential pressure gauge has a color band and a max indicating pointer that provides accurate feedback, even after shutdown. differentialpressure.com

Timeline photos 04/19/2017

Stop forgetting to change your filter cartridges! Our filter status indicators (like these DPP975's) are low cost ways to protect your system. Choose either a compatible filter head (like these pentair big blues) our 2-in-1 bypass valve option, or the remote mounting option that has 1/8" NPT connections.

Timeline photos 04/13/2017

Power drill ran out of battery yesterday while working on a project, so we had to pull out a mechanical hand drill. It made us realize another reason why mechanical pressure gauges continue to dominate the industry compared to electronic. Nobody wants to run out of battery when they need to check the status of their filter system.

Timeline photos 04/05/2017

A red "max indicating pointer" is a great option for operators that don't have the time to constantly monitor a specific system. The pointer resets by twisting a small k**b and can show what the max was that day. Great for and much more.


Making subassemblies for the DPP750 filter status indicator.

Timeline photos 04/01/2017

The DPP175 filter status indicator mounts directly into a filter head. This fuel filter set up is just another example of how simple and effective they are to making sure your filters are operating properly.

Timeline photos 03/29/2017

The DPP975 filter status indicator is included in our free sample kits. For $20, you can't beat the visual feedback they provide for your operators. .water.filter

Timeline photos 03/29/2017

A peak into the differential pressure application manual from our free samples. Request yours today at differentialpressure.com Request a free sample today. .water.filter

Timeline photos 03/29/2017

Request a free sample today and we will send you a package of some of our status indicators and a manual about differential pressure applications. These indicators are trusted by more than 3,000 manufacturers around the world and serve as one of the most cost effective ways to monitor you filtration system. .water.filter

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WORLD'S FIRST Potato Cannon with Semi-Auto Revolver



11 Sycamore Way
Branford, CT

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm
Saturday 8am - 6pm
Sunday 8am - 6pm

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