Best Compound Gauges of 2025

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Compound gauges are a type of pressure gauge that measures both positive and negative pressure. They are equipped with two different pressure scales, one for positive pressure and the other for vacuum pressure. These gauges are commonly used in HVAC systems, refrigeration units, and pneumatic equipment. The dual-scale feature allows for a more accurate reading of pressure changes and ensures that the correct pressure is maintained in the system. Compound gauges are available in a variety of sizes and pressure ranges to accommodate different applications.
At a Glance: Our Top Picks
Top 10 Compound Gauges
JB Industries M2-820 Glow In The Dark Manifold Gauges
The JB Industries M2-820 Glow In The Dark Manifold Gauges are ideal for measuring refrigerants such as R-22, R-404A, and R-410A. The compound steel case is illuminated and the gauges are surge dampened for accuracy. The high impact clear Lexan lens and full-size brass movements make these gauges durable and easy to use. The recalibration screw ensures that the gauges stay accurate and the 1/8" MPT connection makes them compatible with a wide range of refrigeration systems. Made in the USA.
PIC Gauges AMMONIA-LF-404CH Glycerin Filled Ammonia Gauge
PIC Ammonia Gauge features an all welded case and connection for durability. The stainless steel case and bezel provide a sleek look and protection. With a built-in snubber, it ensures smooth pressure readings. The brass socket and movement enhance accuracy. The phosphor bronze bourdon tube offers reliable performance. This gauge is ideal for monitoring ammonia levels in various industrial settings.
PIC Gauges AMMONIA-LF-254CH
PIC Ammonia Gauge features an all welded case and connection for durability. The stainless steel case and bezel offer a sleek design. With a built-in snubber, it helps reduce pressure surges. The brass socket and movement ensure reliable performance. The phosphor bronze bourdon tube provides accurate pressure readings.
Dixon GC210 Compound Gauge
The Dixon Compound Gauge GC210, with a 2-1/2" face and 1/4" center back mount, weighing only 1 pound, originates from the USA. It features a PowerFlex movement with a polyester segment, specially crafted for long-lasting use. This compound gauge by Dixon is ideal for accurately measuring pressure up to 160 psi. The durable design ensures extended wear, making it a reliable tool for various applications.
Ashcroft Compound Gauge 30 Hg to 30 psi
The Ashcroft Compound Gauge is designed for precise pressure and vacuum measurement. This tool is essential for anyone needing to monitor both positive and negative pressure levels effectively. With a range from 30 inches of mercury to 30 psi, it provides a versatile solution for various applications. Additionally, its reliable construction ensures accurate readings, giving you peace of mind while you work. Made in the United States, this gauge reflects quality craftsmanship, making it a dependable choice for professionals and hobbyists alike.
GRAINGER APPROVED Compound Gauge 4-1/2 in
The GRAINGER APPROVED Compound Gauge is designed for versatility and precision. With a 4-1/2 inch dial, it provides clear readings, making it easy for you to monitor pressure levels accurately. Its durable brass connection and bronze tube ensure long-lasting performance, even in tough environments. Operating effectively in temperatures ranging from -40 to 140 degrees Fahrenheit, this gauge is suitable for a variety of applications. Additionally, its glass lens offers protection while allowing you to read measurements effortlessly, enhancing your overall user experience.
PIC Gauges 6001-2LA-GF Pressure Gauge
The PIC Gauges Pressure Gauge is designed to provide accurate readings with its high-quality features. Its laminated safety glass lens ensures durability and protection, making it ideal for various environments. The micro-adjustable pointer allows you to fine-tune your measurements, giving you the precision you need. Being hermetically sealed and weatherproof, this gauge can withstand tough conditions, ensuring reliable performance. Additionally, the welded case and connection enhance its strength, making it a dependable choice for your pressure measurement needs.
GRAINGER APPROVED Compound Gauge
The GRAINGER Compound Gauge is designed for refrigeration ammonia applications, providing reliable measurements from a vacuum of 30 inches of mercury to 300 psi. Its sturdy black steel casing ensures durability in various environments, while the polycarbonate lens offers excellent visibility. With an operating temperature range of -40 to 150 degrees Fahrenheit, this gauge can perform well in extreme conditions. Additionally, the 1/4" NPT connection allows for easy installation, making it a convenient choice for your monitoring needs.
PIC Gauges 401DFW-404CF Ammonia Gauge
The PIC Ammonia Gauge is designed with a stainless steel bourdon tube and connection, ensuring durability and resistance against corrosion. Its all-welded case and connection provide an added layer of protection, making it ideal for demanding refrigeration environments. The stainless steel case and bezel not only enhance its longevity but also give it a professional appearance. Additionally, the built-in snubber helps to minimize vibrations, allowing for more accurate readings. This combination of features makes it easier for you to monitor ammonia pressure reliably and effectively.
ASHCROFT 1259SD Compound Gauge
The ASHCROFT Compound Gauge is designed to measure pressure and vacuum with precision. With a 4-1/2 inch dial, it offers an accuracy of +/-0.5%, ensuring reliable readings for your applications. The gauge features a durable glass lens that protects the dial and enhances visibility, making it easy for you to read measurements at a glance. Additionally, the thermoplastic case is built to withstand a wide temperature range, from -50 to 150 degrees Fahrenheit, providing versatility in various environments. The 316L stainless steel socket and tube materials ensure durability and resistance to corrosion, making this gauge a dependable choice for long-term use.
Frequently Asked Questions (FAQs)
1. How accurate is a compound pressure gauge?
A compound pressure gauge is effective for measuring both vacuum and positive pressure but is limited to lower pressure ranges, typically 200 psi or less. If used for higher pressure ranges, the error band of 0.25% of full scale can exceed the vacuum range of -14.7 psi.
2. What are the four types of pressure gauge?
There are several types of pressure gauges including Bourdon Tube Pressure Gauge, Diaphragm Pressure Gauge, Capsule Pressure Gauge, Absolute Pressure Gauge, Differential Pressure Gauge, Bellows Pressure Gauge, Manometer Pressure Gauge, and Piezometer Pressure Gauge.
3. What are the different types of gauges in HVAC?
In HVAC, the three most popular gauges are High Pressure Gauges, Vacuum Gauges, and Compound Gauges. High Pressure Gauges with a scale range from 0 to 500 psi are used to measure the high-pressure side of the refrigerating system. It's important to know the typical pressure of the point being measured.
During our compound gauge research, we found 24 compound gauge products and shortlisted 10 quality products. We collected and analyzed 3,586 customer reviews through our big data system to write the compound gauges list. We found that most customers choose compound gauges with an average price of $37.59.
The compound gauges are available for purchase. We have researched hundreds of brands and picked the top brands of compound gauges, including JB Industries, PIC Gauges, Dixon, ASHCROFT, GRAINGER APPROVED. The seller of top 1 product has received honest feedback from 769 consumers with an average rating of 4.9.

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.