Merit Instruments Technical Resources 

Understanding Thermowells and how to select, design and understand their applications.

Selecting a pressure gauge involves more than choosing a pressure range, dial size, or connection. For many industrial applications, the gauge must also be appropriate for the applicable standards, specifications, operating environment, and customer requirements. Two standards frequently encountered in international pressure-gauge applications are ASME B40.100 and the EN 837 series. Although both address pressure gauges, they are not simply interchangeable versions of the sam

High-Precision Digital Pressure Gauges - a technical guide to accuracy, selection and application. Updated August, 2026.

This guide provides product-specific information regarding Merit Instruments' Private Logo program, including minimum order quantities (MOQs) and applicable quantity requirements by product series.

The differences between a liquid in glass and bimetallic dial thermometer.

Understanding Diaphragm (Chemical) Seals A comprehensive Technical guide

NPT, BSPP, BSPT and JIS Threads - what's the difference?

High process temperatures can damage a pressure gauge, transmitter, pressure switch or diaphragm seal. Even when the instrument continues to operate, excessive heat can affect accuracy, shorten service life and cause premature failure of internal components. Two common accessories used to protect pressure instruments from elevated process temperatures are: Pressure gauge syphons Finned cooling towers or cooling elements Although both products reduce the temperature reaching t

If your pressure gauge needle is constantly vibrating, fluctuating rapidly, or failing prematurely, the problem may not be the gauge itself—it could be your process. A sintered pressure snubber is a simple but highly effective accessory designed to protect pressure gauges, pressure transmitters, and switches from sudden pressure spikes and pulsations. How does it work? A sintered snubber is manufactured from porous stainless steel or bronze. Thousands of microscopic passages

Learn the differences between laminated safety glass and tempered safety glass used in industrial instrumentation. Compare strength, safety, durability, and ideal applications to choose the right solution.

Pressure gauges are among the most widely used instruments in industrial, commercial, HVAC, and process applications. Selecting the correct gauge technology is critical for ensuring accurate measurements, reliable performance, and long service life. Two of the most common mechanical pressure measurement technologies are Bourdon tube pressure gauges and capsule pressure gauges. While both measure pressure, they are designed for very different operating ranges and applications.

Merit Instruments supplies custom pressure gauges, industrial thermometers, and OEM instrumentation solutions for manufacturers throughout HVAC, hydraulic, compressor, water treatment, industrial processing, and mechanical systems industries. Companies looking for private-label gauges, branded dial thermometers, custom pressure instrumentation, and low-volume OEM manufacturing solutions can work with Merit Instruments to develop application-specific products with professional

In the vast landscape of industrial instrumentation, where precision and reliability are paramount, the choice between analog and digital technologies often arises. While digital instrumentation has gained prominence in recent years due to its advanced features and connectivity, analog instrumentation continues to hold its ground in many industrial applications. In this blog post, we'll delve into the realm of analogue industrial instrumentation and explore why it remains a r

Clean and safe drinking water is essential for the well-being of individuals and communities. However, ensuring the quality of drinking water involves more than just treatment processes; it also requires attention to the materials used in water distribution systems. One significant concern is the presence of lead, a toxic metal that can leach into water from pipes, fixtures, and fittings. In response to this issue, the Safe Drinking Water Act (SDWA) has been instrumental in r

In the intricate world of HVAC systems within large-scale building projects, precision instruments that are robust and accurate are paramount. To achieve optimal performance, maintain energy efficiency, and ensure occupant comfort, engineers and technicians rely on a variety of sophisticated instrumentation. Among these essential tools are pressure gauges, liquid-in-glass thermometers, and bimetal thermometers. Let's explore how these instruments play a crucial role in the de

In the world of temperature measurement, precision and accuracy are paramount, especially in fields like medicine, food service, and industrial processes. When it comes to selecting the right thermometer for the job, the choice often boils down to two main options: direct reading thermometers and remote-reading thermometers. Each type has its own set of advantages and ideal use cases, and understanding when to use each can ensure accurate temperature monitoring in various sit

In the world of pressure measurement, the choice between digital and analog pressure gauges can often be a challenging decision. Both types have their own sets of advantages and disadvantages, making it crucial to understand your specific requirements before making a selection. In this article, we'll explore the differences between digital and analog pressure gauges to help you make an informed decision. Understanding Analog Pressure Gauges Analog pressure gauges have been a

In the world of pressure gauges, accuracy and reliability are paramount. When it comes to selecting the right instrument for your application, the choice between a vibration-free movement and a glycerin-filled pressure gauge is crucial. In this blog post, we'll explore the advantages of opting for a vibration-free movement and why it might be the superior choice for certain scenarios. Pressure gauges play a critical role in various industries, providing real-time measurements

If you have ever seen a boiler, chances are you have seen a tridicator, but what does it do? A tridicator is a combination of a bimetallic dial thermometer and a mechanical pressure gauge. These instruments are almost exclusively used in boiler systems. The tridicator allows for a visual temperature and pressure check to confirm that the system is working within the optimal pressure and temperature range. Many tridicators (like the one pictured above), also include a red-set