0-30 PSI Glycerin Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4 NPT, Stainless Steel Case, Lower Mount, for Water Oil Air Pressure Test

The SENCTRL 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge is a high-quality, precision instrument designed for measuring low-pressure and vacuum applications. With its oil-filled design, this gauge offers enhanced durability and accuracy, making it suitable for automotive, industrial, and mechanical applications. Below is a detailed review of the product based on its features, performance, and value.Features & Specifications:Vacuum Measurement Range: The gauge measures a vacuum pressure range of 30 inHg, which is ideal for low-pressure and vacuum systems in automotive, industrial, and laboratory applications. This range is sufficient for most systems that require precise monitoring of negative pressure or vacuum levels.Oil-Filled Design: The gauge is silicone oil-filled, which helps dampens vibrations and provides better protection for the internal components. This design also ensures greater accuracy in reading, especially when subjected to fluctuating pressures or vibrations in engine bays or industrial environments.Dial Size & Visibility: The 2.5-inch dial size provides a clear, easy-to-read display of the pressure measurement. The large dial makes it easier to read even from a distance or under low-light conditions, which is essential in many automotive and workshop settings.Lower Mount with 1/4" NPT: The gauge features a 1/4" NPT (National Pipe Thread) lower mount, which is a common size used for industrial and automotive applications. This ensures easy installation into existing systems, whether it's used for vacuum lines, oil pressure monitoring, or other low-pressure applications.Material and Construction: The gauge is made of high-quality materials, with a durable casing that can withstand the rigors of everyday use in demanding environments. The oil-filled silicone helps to protect the internal components from moisture, dust, and other environmental factors, which extends the life of the gauge.Accuracy and Durability: The liquid-filled design not only protects the internal mechanism but also helps improve accuracy by stabilizing the needle movement, ensuring steady readings even in dynamic conditions.Pros:Enhanced Accuracy: The oil-filled design ensures steady needle movement and reliable readings, even in systems prone to vibration or fluctuating pressures. This makes it ideal for precise vacuum pressure monitoring, especially in automotive applications.Long-Lasting Durability: The silicone oil protects the internals from damage caused by shocks, vibrations, and moisture, extending the life of the gauge. The oil also helps prevent the needle from sticking or jumping, providing more consistent readings over time.Clear and Easy-to-Read Dial: The 2.5-inch dial makes it easy to monitor pressure readings from a distance, which is useful for installations in tight spaces or hard-to-reach locations.Wide Range of Applications: The gauge’s 30 inHg vacuum range and 1/4" NPT lower mount make it suitable for a variety of low-pressure and vacuum applications, such as measuring vacuum pressure in engines, fuel systems, or even HVAC and laboratory environments.Protection from Environmental Factors: The oil-filled feature provides protection against moisture and dust, which is critical for maintaining accuracy and functionality in harsh environments like engine bays or industrial settings.Affordably Priced: Compared to other high-quality vacuum gauges on the market, the SENCTRL 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge offers excellent value for money, making it an affordable option for those who need reliable performance without breaking the bank.Cons:Size May Be Too Large for Some Installations: The 2.5-inch dial size might be too large for installations in very tight spaces, especially in automotive or machinery setups with limited room. Users with constrained installation areas may want to look for smaller, more compact options.Potential for Oil Leaks: While the oil-filled design offers many benefits, there is a risk of the oil leaking over time if the gauge is damaged or improperly installed. However, this is generally rare with quality gauges and can be mitigated with careful handling and proper installation.Not Ideal for High-Pressure Applications: This gauge is specifically designed for low-pressure and vacuum measurements. It would not be suitable for applications that require high-pressure readings, so users with high-pressure systems may need a different gauge.Conclusion:The SENCTRL 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge is an excellent choice for anyone looking for a reliable, accurate, and durable vacuum gauge for low-pressure systems. Its oil-filled design ensures stability and protection against vibrations, moisture, and shocks, which makes it well-suited for automotive, industrial, and other high-demand applications.The 2.5-inch dial offers easy-to-read pressure readings, and the 1/4" NPT lower mount ensures straightforward installation in most systems. With a vacuum pressure range of 30 inHg, it’s perfect for monitoring fuel systems, engine vacuum lines, HVAC systems, and more.While the gauge may be a bit large for some tight installations, its overall performance, accuracy, and durability make it a great value for the price. If you need a high-quality vacuum gauge for a low-pressure system or vacuum application, the SENCTRL 30 inHg is a solid and affordable choice.

Glycerin filled, accurate pressure gauge. Metal and glass, not cheap plastic. We’ll see how it holds up outside, but I think it will do well.

We use this type for the first time instead of using the Hayward more expensive device this one worked perfectly with the lower pressure setting instead of the 60 pounds per square inch which is not needed anyways we're very very happy with it

Perfect. Great quality and arrived quickly. Installed 8 of these on a commercial re-circulator and gave me the results the team and I were looking for.

Looks nice, I figured the stainless case would be better than a chromed steel case. Liquid filled is generally better than dry for reliability and longevity.But the bubble in the glycerin is rather large. So large that the upper part of the dial - in the 10-20 PSI range - isn't covered by the glycerin. I could live with that, the glycerin in the mechanism would still get me reliability. But once installed the inside of the glass (where there is the bubble and no glycerin) was covered with condensation, see photo. So it's not hard to read, see photo. And unfortunately this range (10-20 PSI) is the working range for a residential boiler.This is the second glycerin-filled gauge that has had the same problem. So I can't say if this one is unique or if all liquid-filled gauges have this issue. This range of gauge is typical for boiler systems, so one would expect that it would be OK with hot (but certainly not boiling) temperatures.

I bought this to replace a broken pressure gauge on my Hayward swimming pool filter. I installed it using a T-fitting on the pressure gauge port to connect both this gauge and an electronic ADC sensor.The readings from this gauge match the electronic sensor exactly, so I trust that it’s accurate. The gauge itself feels well-built and of high quality. It was easy to install and is very easy to read.Great value and performance—five stars from me.

Worked out perfect for guage to set and check presdure on pressure washers 🔧

Use teflon tape, doesn't have to be tight just snug to keep from leaking