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304SS 2.5" 0-300 PSI/ 0-20 Bar Liquid Filled Pressure Gauge, 1/4 NPT Bottom Connection

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Description & Features

This precision pressure gauge from Engineered Specialty Products is constructed with durable 304 stainless steel suitable for demanding environments. It features a 2.5" dial for accurate readings up to 300 PSI or 20 Bar ideal for various industrial applications.

The liquid-filled design minimizes the impact of vibration and pressure fluctuations enabling consistent performance. The brass connection with 1/4 NPT threading ensures a reliable and secure installation.

Accuracy is kept at 3-2-3% across the scale protected by a polycarbonate window. The gauge functions optimally within 25%-75% of its range with maximum efficiency not exceeding 50% under pulsation conditions.

MPN: PRO-201L-254H

Supplier Part Number: PRO-201L-254H

Specifications

a Dimensions
2.48 in
b Dimensions
1.21 in
c Dimensions
2.71 in
Calibrated
Without Calibrated
Case Included
Without Case
Connection Type
NPT
d Dimensions
0.46 in
Dial Face
Polycarbonate
Dimensions
2.65 in H x 1.21 in W
Fill Medium
Glycerin
Fill Type
Liquid Filled
Gauge Size
2-1/2 in Dia
Gauge Type
Industrial Vacuum
Material
Stainless Steel
Series
Pro 200 Series
Sg Accuracy
+/-3-2-3% of Span +/-3% over First and Last Quarters of the Scale, +/-2% over the Middle Half of the Scale
Sg Male Connection
0.013 in Brass Throttle Plug

Product Questions & Answers (14)

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Question by: Ricky H on Feb 2, 2026, 8:33 PM
need to swap out an old gauge. is this one the kind with the 1/4 npt on the bottom?
Answer by: Customer Support on Feb 4, 2026, 5:04 PM
Yes, it features a 1/4 NPT connection on the bottom, making it compatible with setups that require a gauge mounted underneath.
Question by: Dean W on Nov 5, 2025, 5:49 PM
How high does that dial read, in both PSI and bar?
Answer by: Customer Support on Nov 8, 2025, 4:49 PM
This gauge ranges up to 300 PSI and has a scale for 0 to 20 bar.
Question by: Rex G on Oct 23, 2025, 1:44 PM
gotta make sure how this hooks up to my line. is the threading on the back or the bottom?
Answer by: Customer Support on Oct 25, 2025, 11:19 AM
The connection is on the bottom, utilizing a 1/4 NPT thread for direct mounting into the piping.
Question by: Curt E on Nov 17, 2025, 2:36 PM
looking for a gauge that wont rust out. what material is the case and whats the max pressure it reads
Answer by: Customer Support on Nov 18, 2025, 11:34 AM
The casing is constructed from 304 stainless steel, offering robust protection against rust. It can measure up to a maximum pressure of 300 PSI or 20 Bar, and the liquid filling helps dissipate vibrations to protect the interior parts.
Question by: Bonnie E on Oct 14, 2025, 12:02 PM
Can this gauge handle hydraulic oil or just water-based fluids?
Answer by: Customer Support on Oct 16, 2025, 8:02 AM
Gauges filled with liquid, like this one, are suitable for hydraulic oil. The case and inner workings are made from 304 stainless steel, making them durable against petroleum-based fluids, which is perfect for typical hydraulic tasks.
Question by: Neal R on Jul 23, 2025, 8:50 PM
what's the fill liquid inside for
Answer by: Customer Support on Jul 26, 2025, 3:45 PM
The fill liquid reduces needle fluctuations when there's vibration or sudden pressure changes. This makes the reading much clearer, preventing the needle from erratically bouncing.
Question by: Peggy H on Aug 28, 2025, 12:54 PM
Got a setup that runs up to 250 PSI, bottom connection needed. This one gonna hold up for that?
Answer by: Customer Support on Aug 30, 2025, 11:10 AM
With a capacity of 0 to 300 PSI or 0 to 20 Bar, it works fine for your needs. The liquid fill stabilizes the needle, and it comes with a 1/4 NPT bottom connection, common for many hydraulic setups.
Question by: Ricky H on Feb 14, 2026, 12:30 PM
need to swap out an old gauge. is this one the kind with the 1/4 npt on the bottom?
Answer by: Customer Support on Feb 15, 2026, 12:03 PM
Yes, it features a 1/4 NPT connection on the bottom, making it compatible with setups that require a gauge mounted underneath.
Question by: Dean W on Mar 17, 2025, 6:03 AM
How high does that dial read, in both PSI and bar?
Answer by: Customer Support on Mar 20, 2025, 11:24 AM
This gauge ranges up to 300 PSI and has a scale for 0 to 20 bar.
Question by: Rex G on Dec 12, 2025, 10:26 AM
gotta make sure how this hooks up to my line. is the threading on the back or the bottom?
Answer by: Customer Support on Dec 14, 2025, 9:28 AM
The connection is on the bottom, utilizing a 1/4 NPT thread for direct mounting into the piping.
Question by: Curt E on Oct 20, 2025, 10:33 AM
looking for a gauge that wont rust out. what material is the case and whats the max pressure it reads
Answer by: Customer Support on Oct 22, 2025, 12:07 PM
The casing is constructed from 304 stainless steel, offering robust protection against rust. It can measure up to a maximum pressure of 300 PSI or 20 Bar, and the liquid filling helps dissipate vibrations to protect the interior parts.
Question by: Bonnie E on Aug 17, 2025, 9:23 PM
Can this gauge handle hydraulic oil or just water-based fluids?
Answer by: Customer Support on Aug 20, 2025, 4:28 PM
Gauges filled with liquid, like this one, are suitable for hydraulic oil. The case and inner workings are made from 304 stainless steel, making them durable against petroleum-based fluids, which is perfect for typical hydraulic tasks.
Question by: Neal R on Sep 4, 2025, 9:13 AM
what's the fill liquid inside for
Answer by: Customer Support on Sep 5, 2025, 10:30 AM
The fill liquid reduces needle fluctuations when there's vibration or sudden pressure changes. This makes the reading much clearer, preventing the needle from erratically bouncing.
Question by: Peggy H on Apr 18, 2025, 9:44 PM
Got a setup that runs up to 250 PSI, bottom connection needed. This one gonna hold up for that?
Answer by: Customer Support on Apr 20, 2025, 2:25 PM
With a capacity of 0 to 300 PSI or 0 to 20 Bar, it works fine for your needs. The liquid fill stabilizes the needle, and it comes with a 1/4 NPT bottom connection, common for many hydraulic setups.

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