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Differential Pressure Gauges
Monitor critical system performance with our reliable differential pressure gauges. Designed to measure the difference between two pressure points, these gauges provide essential data to detect clogged filters, monitor pump performance, and ensure safe, efficient operation. Our selection includes mechanical and digital differential pressure gauges, available in a variety of ranges, dial sizes, and connection types to suit your application. Commonly used in HVAC systems, filtration units, hydraulic equipment, and process industries, these gauges deliver accurate readings that help prevent costly downtime and equipment damage. Built with durable materials and trusted-brand reliability, our differential pressure gauges provide long-lasting accuracy, easy installation, and dependable performance, even in demanding environments.
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The Dwyer - DPG409-100DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 2 psi to 100 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-015DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 15 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-005DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 5 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-050DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 50 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-030DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 30 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-1KDWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 1000 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-2.5DWU-W is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 2.5 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, Battery Powered, and Wireless Transmitter. Part of the DPG409 Series. Sold individually.
Save 8%$2,363.22
$2,171.12
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-500DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 500 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - PGD-45L-20 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, 0 psi to 20 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Bottom Mount. Part of the PGD-45 Series. Sold individually.
$2,046.44
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
The WIKA Model 70X.04 Bourdon Tube Pressure Gauge is a precision-engineered instrument designed for measuring pressure in aggressive and demanding industrial environments. Featuring a full stainless steel construction, it offers exceptional durability, reliability, and long service life in challenging conditions.
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The Dwyer - DPG409-10WDWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 inH?O to 10 inH?O, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,166.44
$1,990.34
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-150DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 150 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPGM409-010BDWU is a Digital Differential Pressure Gauge featuring High Accuracy, Differential, 0 bar to 10 bar, ± 0.08 %, 1/4 " BSPP Male, 4 Digit, and Battery Powered. Part of the DPGM409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPGM409-025HDWU is a Digital Differential Pressure Gauge featuring High Accuracy, Differential, 0 mbar to 25 mbar, ± 0.08 %, 1/4 " BSPP Male, 4 Digit, and Battery Powered. Part of the DPGM409 Series. Sold individually.
Save 8%$2,150.96
$1,976.11
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPGM409-3.5BDWU-W is a Digital Differential Pressure Gauge featuring High Accuracy, Differential, 0 bar to 3.5 bar, ± 0.08 %, 1/4 " BSPP Male, 4 Digit, Battery Powered, and Wireless Transmitter. Part of the DPGM409 Series. Sold individually.
Save 8%$2,253.55
$2,070.36
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - PGD-45B-100 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, 0 psi to 100 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Rear Connection. Part of the PGD-45 Series. Sold individually.
$2,076.88
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
The Dwyer - PGD-45B-15/15 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, -15 psi to 15 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Rear Connection. Part of the PGD-45 Series. Sold individually.
$2,076.88
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
The Dwyer - PGD-45B-600 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, 0 psi to 600 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Rear Connection. Part of the PGD-45 Series. Sold individually.
$2,076.88
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$647.10
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$303.15
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$590.30
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$359.95
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-100 psid.
$359.95
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-100 psid.
$303.15
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
The Dwyer - DPG409-100DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 2 psi to 100 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-015DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 15 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-005DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 5 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-050DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 50 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-030DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 30 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,194.86
$2,016.44
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-1KDWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 1000 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-2.5DWU-W is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 2.5 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, Battery Powered, and Wireless Transmitter. Part of the DPG409 Series. Sold individually.
Save 8%$2,363.22
$2,171.12
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-500DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 500 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - PGD-45L-20 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, 0 psi to 20 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Bottom Mount. Part of the PGD-45 Series. Sold individually.
$2,046.44
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
The WIKA Model 70X.04 Bourdon Tube Pressure Gauge is a precision-engineered instrument designed for measuring pressure in aggressive and demanding industrial environments. Featuring a full stainless steel construction, it offers exceptional durability, reliability, and long service life in challenging conditions.
Configure Product
Configure product to see pricing
The Dwyer - DPG409-10WDWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 inH?O to 10 inH?O, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,166.44
$1,990.34
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPG409-150DWU is a Digital Pressure Gauge featuring Very High Accuracy, Differential, 0 psi to 150 psi, ± 0.08 %, 1/4 " NPT Male, 4 Digit, and Battery Powered. Part of the DPG409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPGM409-010BDWU is a Digital Differential Pressure Gauge featuring High Accuracy, Differential, 0 bar to 10 bar, ± 0.08 %, 1/4 " BSPP Male, 4 Digit, and Battery Powered. Part of the DPGM409 Series. Sold individually.
Save 8%$2,054.12
$1,887.15
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPGM409-025HDWU is a Digital Differential Pressure Gauge featuring High Accuracy, Differential, 0 mbar to 25 mbar, ± 0.08 %, 1/4 " BSPP Male, 4 Digit, and Battery Powered. Part of the DPGM409 Series. Sold individually.
Save 8%$2,150.96
$1,976.11
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - DPGM409-3.5BDWU-W is a Digital Differential Pressure Gauge featuring High Accuracy, Differential, 0 bar to 3.5 bar, ± 0.08 %, 1/4 " BSPP Male, 4 Digit, Battery Powered, and Wireless Transmitter. Part of the DPGM409 Series. Sold individually.
Save 8%$2,253.55
$2,070.36
Should ship between 15 Nov and 22 Nov
Subject to factory lead times
The Dwyer - PGD-45B-100 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, 0 psi to 100 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Rear Connection. Part of the PGD-45 Series. Sold individually.
$2,076.88
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
The Dwyer - PGD-45B-15/15 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, -15 psi to 15 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Rear Connection. Part of the PGD-45 Series. Sold individually.
$2,076.88
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
The Dwyer - PGD-45B-600 is a Differential Pressure Gauge featuring Heavy-Duty, 1/4 " NPT Male, 0 psi to 600 psi, ± 2 - 1 - 2 % Accuracy, > 0.25 % Class, 4.5 " Dial, and Rear Connection. Part of the PGD-45 Series. Sold individually.
$2,076.88
Should ship between 29 Nov and 06 Dec
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$647.10
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$303.15
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$590.30
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-10 psid.
$359.95
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-100 psid.
$359.95
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
Differential piston gage, in-line connections, range 0-100 psid.
$303.15
Should ship between 15 Nov and 29 Nov
Subject to factory lead times
FAQ
- A differential pressure gauge shows the difference between two pressures on a single dial. Two process connections, one mechanism, one display reading 0 to a full-scale DP. Used to measure flow across an orifice, check pump performance, monitor filter pressure drop, and indicate tank level in pressurized vessels. Eliminates the math you'd otherwise do comparing two separate gauges.
- Filter and strainer pressure drop (you can see when the filter is loading), pump suction and discharge spread (shows if the pump is making head), flow across an orifice plate (DP correlates to flow), heat exchanger fouling monitoring, and level in a closed pressurized tank (DP between top vapor space and bottom liquid). Anywhere two pressures need to be compared continuously, the DP gauge does it with one instrument.
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About NISCO Inc.
NISCO offers a wide range of pressure gauges & instruments, diaphragm seals, thermometers, valves, and flow control products to the industrial and commercial marketplaces, as well as other resellers like ourselves. We can also provide other value-added services such as gauge repair, NIST traceable calibration, diaphragm seal assembly, and valve automation. NISCO takes pride in providing extensive product knowledge, helpful customer service, and market competitive pricing to help fit whatever need you may have because it is our goal to be regarded by our customers as the best supplier of pressure, temperature, and flow control products.