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304SS 2.5" 30Hg-30 PSI/ -1.0-2.0 Bar Liquid Filled Pressure Gauge, 1/4 NPT Bottom Connection

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Description & Features

Designed for precise monitoring this engineered specialty product offers reliable performance in industrial pressure measurement. The device features a robust 304 stainless steel construction for enhanced durability and corrosion resistance. With a 2.5-inch gauge diameter it measures pressure ranges from 30Hg-30 PSI / -1.0-2.0 Bar.

Equipped with a liquid-filled mechanism it ensures stable readings even under dynamic conditions. The bottom connection is a 1/4 NPT thread making it suitable for various applications where accurate pressure monitoring is essential. This gauge includes a brass male connection with a 0.013" throttle plug for added reliability.

The unit's accuracy is rated at 3-2-3% of span providing dependable measurements across a wide range. For optimal performance it is recommended to operate within 25%-75% of the scale and not exceed 50% if pulsation is present.

Other notable specifications include a polycarbonate window and specific dimensions (A=2.48 B=1.21 C=2.71 D=0.46). This makes it a versatile option for various industrial settings demanding precise pressure measurement and robust design.

MPN: PRO-201L-254CC

Supplier Part Number: PRO-201L-254CC

Specifications

a Dimensions
2.48 in
b Dimensions
1.21 in
c Dimensions
2.71 in
Calibrated
Without Calibrated
Case Included
Without Case
Color
Black/White
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: Carl C on Oct 26, 2025, 9:19 PM
trying to replace a busted gauge. is this one the 2.5 inch face with the 1/4 npt bottom hook-up?
Answer by: Customer Support on Oct 27, 2025, 9:45 AM
Size-wise, it’s got a 2.5 inch face with a bottom connection that’s a 1/4 NPT. Perfect fit for your standard bottom-mount setting.
Question by: Howard F on Jul 6, 2025, 2:50 PM
On the scale, does it read vacuum and pressure, or just one or the other?
Answer by: Customer Support on Jul 9, 2025, 9:24 AM
The scale can read both. It indicates vacuum down to 30 inHg and pressure up to 30 PSI, along with a metric range of -1.0 to 2.0 bar.
Question by: Clint H on Jul 13, 2025, 10:21 AM
need to replace an old gauge on my pump. is the fitting on this one sticking out the back or the bottom? and what size thread we talking
Answer by: Customer Support on Jul 15, 2025, 8:52 AM
The 1/4 NPT brass connector is positioned at the bottom of the 2.5 inch dial, making it suitable for typical vertical installations.
Question by: Larry H on Oct 7, 2025, 1:42 PM
wondering about the dial readings on here. does it show both vacuum pull and positive pressure?
Answer by: Customer Support on Oct 9, 2025, 1:01 PM
The scale accounts for both vacuum and pressure. It descends to 30 inches of mercury for vacuum readings and rises to 30 PSI, with an additional metric range from -1.0 to 2.0 Bar.
Question by: Dwayne C on Oct 16, 2025, 9:41 PM
the liquid fill in this gauge, is that to help with vibration or what exactly does that do?
Answer by: Customer Support on Oct 18, 2025, 2:55 PM
The liquid fill minimizes needle jitters from vibration or pulsation, ensuring a steady reading in bumpy environments. It also keeps internal parts lubricated and shields them from moisture.
Question by: Hubert J on Apr 29, 2025, 4:57 PM
I need something that reads vacuum and pressure both - this one goes from 30 inches mercury vacuum up to 30 psi positive right
Answer by: Customer Support on May 2, 2025, 2:07 PM
That's right. This compound gauge tracks both vacuum and pressure, ranging from 30 inches of mercury in vacuum to 30 psi in pressure, and uses a metric scale of -1.0 to 2.0 bar.
Question by: Danny A on Aug 15, 2025, 5:38 PM
got a hydraulic system that runs around 20 psi, would this gauge handle that range without issues
Answer by: Customer Support on Aug 17, 2025, 11:47 AM
It spans from a vacuum at 30 inches of mercury to 30 psi, or between -1.0 and 2.0 bar, so 20 psi would fit comfortably within that performance range.
Question by: Carl C on Dec 11, 2025, 8:32 AM
trying to replace a busted gauge. is this one the 2.5 inch face with the 1/4 npt bottom hook-up?
Answer by: Customer Support on Dec 12, 2025, 12:52 PM
Size-wise, it’s got a 2.5 inch face with a bottom connection that’s a 1/4 NPT. Perfect fit for your standard bottom-mount setting.
Question by: Howard F on Jan 30, 2026, 6:02 PM
On the scale, does it read vacuum and pressure, or just one or the other?
Answer by: Customer Support on Feb 1, 2026, 1:06 PM
The scale can read both. It indicates vacuum down to 30 inHg and pressure up to 30 PSI, along with a metric range of -1.0 to 2.0 bar.
Question by: Clint H on Oct 22, 2025, 11:30 AM
need to replace an old gauge on my pump. is the fitting on this one sticking out the back or the bottom? and what size thread we talking
Answer by: Customer Support on Oct 24, 2025, 3:52 PM
The 1/4 NPT brass connector is positioned at the bottom of the 2.5 inch dial, making it suitable for typical vertical installations.
Question by: Larry H on Nov 6, 2025, 4:43 PM
wondering about the dial readings on here. does it show both vacuum pull and positive pressure?
Answer by: Customer Support on Nov 7, 2025, 12:07 PM
The scale accounts for both vacuum and pressure. It descends to 30 inches of mercury for vacuum readings and rises to 30 PSI, with an additional metric range from -1.0 to 2.0 Bar.
Question by: Dwayne C on Nov 17, 2025, 7:52 PM
the liquid fill in this gauge, is that to help with vibration or what exactly does that do?
Answer by: Customer Support on Nov 18, 2025, 2:37 PM
The liquid fill minimizes needle jitters from vibration or pulsation, ensuring a steady reading in bumpy environments. It also keeps internal parts lubricated and shields them from moisture.
Question by: Hubert J on Mar 28, 2025, 10:01 AM
I need something that reads vacuum and pressure both - this one goes from 30 inches mercury vacuum up to 30 psi positive right
Answer by: Customer Support on Mar 29, 2025, 10:14 AM
That's right. This compound gauge tracks both vacuum and pressure, ranging from 30 inches of mercury in vacuum to 30 psi in pressure, and uses a metric scale of -1.0 to 2.0 bar.
Question by: Danny A on Feb 2, 2026, 12:55 PM
got a hydraulic system that runs around 20 psi, would this gauge handle that range without issues
Answer by: Customer Support on Feb 3, 2026, 2:39 PM
It spans from a vacuum at 30 inches of mercury to 30 psi, or between -1.0 and 2.0 bar, so 20 psi would fit comfortably within that performance range.

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