--- product_id: 498942580 title: "30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5\" Dial Size, 1/4\" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test" brand: "senctrl" price: "$74.81" currency: USD in_stock: true reviews_count: 5 category: "Senctrl" url: https://www.desertcart.us/products/498942580-30-inhg-vacuum-silicone-oil-liquid-filled-low-pressure-gauge store_origin: US region: United States of America --- # 1/4" NPT lower mount Silicone oil filled for vibration damping 30 inHg vacuum range 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test **Brand:** senctrl **Price:** $74.81 **Availability:** βœ… In Stock ## Summary > πŸ”§ Stay ahead of the pressure game with precision you can trust! ## Quick Answers - **What is this?** 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test by senctrl - **How much does it cost?** $74.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/498942580-30-inhg-vacuum-silicone-oil-liquid-filled-low-pressure-gauge) ## Best For - senctrl enthusiasts ## Why This Product - Trusted senctrl brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Dual Scale Readout:** Clear dual scale (-30-0 inHg / -100-0 kPa) dial offers versatile, easy-to-read pressure measurements. - β€’ **IP67 Waterproof Protection:** Sealed against moisture and fogging for crystal-clear visibility in any weather or workspace. - β€’ **Vibration-Resistant Design:** Silicone oil filling stabilizes needle movement, eliminating flutter in high-vibration environments. - β€’ **Precision Vacuum Monitoring:** Accurately measures up to 30 inHg vacuum with Β±3% accuracy for reliable diagnostics. - β€’ **Durable Stainless Steel Case:** 304 stainless steel housing ensures corrosion resistance and longevity in harsh conditions. ## Overview The SENCTRL 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge combines rugged stainless steel construction with a silicone oil-filled mechanism to deliver precise, vibration-resistant vacuum measurements. Featuring a 2.5" dual-scale dial and a universal 1/4" NPT lower mount, this gauge is engineered for automotive, HVAC, and industrial applications requiring reliable low-pressure monitoring. Its IP67 waterproof rating and corrosion-resistant case ensure durability and clear readings in demanding environments, making it an essential tool for professionals who refuse to compromise on accuracy or durability. ## Description Brass and Stainless Steel wetted parts for measuring non-corrosive liquid and gas pressure. Such as coolant, co2, water, oil, air, fuel pressure test. Compatible with air conditioning line repair, co2 tank, hvac tools, car air pump, pipe, tube vacuum test and etc.. Circular dial is enclosed in a 304 stainless steel case for corrosion resistance. Liquid filled inhibits pointer flutter and prevents damage to the internal mechanics from vibration and pulsation. Silicone oil ensures long-term work in low temperature(-40~140℉/-40~60℃) and suits for most outdoor conditions and seasons. Measures pressure with dual scale (-30-0 inHg/-100-0 kPa). Display accuracy is + or - 3/2/3% over the entire range of the gauge IP65 waterproof prevent condensation inside caused fogging of the window. Offer clear reading. Review: Works Great! - 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. Review: Good - Seems good πŸ‘ ## Features - Brass and Stainless Steel wetted parts for measuring non-corrosive liquid and gas pressure. Such as coolant, co2, water, oil, air, fuel pressure test. Compatible with air conditioning line repair, co2 tank, hvac tools, car air pump, pipe, tube vacuum test and etc.. - Circular dial is enclosed in a 304 stainless steel case for corrosion resistance. Liquid filled inhibits pointer flutter and prevents damage to the internal mechanics from vibration and pulsation. - Silicone oil ensures long-term work in low temperature(-40~140℉/-40~60℃) and suits for most outdoor conditions and seasons. - Measures pressure with dual scale (-30-0 inHg/-100-0 kPa). Display accuracy is + or - 3/2/3% over the entire range of the gauge. - IP67 waterproof prevent condensation inside caused fogging of the window. Offer clear reading. - Lower mount male connection with 1/4" NPT thread. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BCYMT1RT | | Best Sellers Rank | #430,206 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #445 in Car Instrument Panel Gauges | | Brand | senctrl | | Brand Name | senctrl | | Customer Reviews | 4.6 out of 5 stars 167 Reviews | | Included Components | Vacuum Gauge | | Item Weight | 0.17 Kilograms | | Manufacturer | SENCTRL | | Material | Stainless Steel | | Material Type | Stainless Steel | | Net Quantity | 1.0 Count | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | Y.6TSL04 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** senctrl - **Item Weight:** 0.17 Kilograms - **Manufacturer:** SENCTRL - **Material:** Stainless Steel ## Images ![30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test - Image 1](https://m.media-amazon.com/images/I/61lKyX56bbL.jpg) ![30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test - Image 2](https://m.media-amazon.com/images/I/615lZjNowTL.jpg) ![30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test - Image 3](https://m.media-amazon.com/images/I/713KQB0GD+L.jpg) ![30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test - Image 4](https://m.media-amazon.com/images/I/61+BpZSa48L.jpg) ![30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, Car AC, HVAC, Air Pump Vacuum Test - Image 5](https://m.media-amazon.com/images/I/61ziiaFb66L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works Great! *by F***S on 3 December 2024* 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. ### ⭐⭐⭐⭐⭐ Good *by M***8 on 28 April 2026* Seems good πŸ‘ ### ⭐⭐⭐⭐⭐ Repeatable Consistent Measurements *by A***G on 29 December 2025* I purchased this, because I needed to do a lift test on an assortment of vacuum motors. I made a little custom adapter to screw on the end and then placed this in the opening of each one. It gave clear readings and allowed me to establish a good understanding of motor performance for various motors running at different power levels. The measurements seemed consistent. Even when coming back and retesting later, the measurements were repeatable. This may not be a typical use case for this sensor, but it worked perfectly for me and achieved exactly what I needed. ## Frequently Bought Together - SENCTRL 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, HVAC, Air Pump Vacuum Test - VOTMELL 4 Rolls 1/2 Inch(W) X 520 Inches(L) Teflon Plumbers Tape,Pipe Sealing & Plumbing Thread Tape,PTFE Water Sealant Seal for Shower Head,White - SENCTRL 30inHg Vacuum Pressure Gauge, 2" Dial, 1/8 NPT Lower Mount, Waterproof, Stainless Steel Case, for Tube Tester, HVAC, Pneumatic Air Compressor, Hand Pump, Valve Test --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/498942580-30-inhg-vacuum-silicone-oil-liquid-filled-low-pressure-gauge](https://www.desertcart.us/products/498942580-30-inhg-vacuum-silicone-oil-liquid-filled-low-pressure-gauge) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-16*