Measurement connections
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Measurement connections for test leads
Connection elements / fittings for measuring pressure in hydraulic systems.
What are measurement connections?
EMA3 measurement connections are specialized components used in power hydraulics, enabling the monitoring and control of pressure parameters in hydraulic systems. They are crucial for diagnostics and maintaining the proper functioning of hydraulic systems, allowing for precise pressure measurements and taking samples of the working medium.
Characteristic features of EMA3 measurement connections
EMA3 connections are characterized by high quality of workmanship and comply with the ISO 15171-1 standard. Made of galvanized steel, they provide corrosion resistance and durability in difficult operating conditions. They are standardly equipped with NBR seals, which ensure tightness in the temperature range from -40°C to +120°C. The connection socket ends with a minimess connector for an M16x2 test lead, which allows for easy and quick connection of measuring devices. EMA3 connections are available with various external threads, both metric (e.g., M10x1, M12x1,5) and imperial (e.g., 1/8" NPT), which allows for their use in various configurations of hydraulic systems.
What is minimess?
Minimess is a type of small, precise hydraulic connector used in measurement systems. It is commonly used in power hydraulics, especially for connecting diagnostic devices such as pressure gauges, pressure sensors or working fluid analyzers. Characteristics of Minimess connectors: Small size: Minimess connectors are characterized by a compact design, which facilitates their installation in places with limited space. High tightness: Thanks to precise workmanship and the use of appropriate materials, Minimess connectors ensure high tightness even in demanding operating conditions. Easy connection and disconnection: The design of the connectors allows for quick and safe connection of measuring devices, often without the need to take the system out of operation. Versatility: Minimess is compatible with various types of measuring devices, making it widely used in hydraulic and pneumatic systems.
Hydraulic measurement connector
A hydraulic measurement connector is an element that allows you to quickly and safely check the pressure in the system without unscrewing the installation. It is permanently installed in the system, and you take the measurement by connecting a pressure gauge or a test kit. This solution is very convenient for service and diagnostics. In practice, the measurement connector acts as a control point. Simply connect the pressure gauge and you immediately see what is happening in the system – whether there is a pressure drop, overload or a problem with the pump. This helps you find the fault faster and reduce machine downtime. Such connectors are used together with elements from the category pressure gauges and vacuum gauges, as well as with accessories such as reductions for pressure gauges, which allow matching threads. In more complex measurement systems, leads from the department hydraulic hoses for pressure measurementare also used, which enable convenient connection of the test kit. A hydraulic measurement connector is a small element, but it greatly facilitates work. It provides quick access to pressure control and allows reacting before a serious failure occurs.
Where are measurement connections used?
EMA3 connections find wide application in the diagnostics of hydraulic systems, enabling: Monitoring of operating pressure in hydraulic systems. Taking samples of the working medium for analysis. Bleeding cylinders and hydraulic installations. Thanks to them, it is possible to quickly and safely connect pressure gauges, pressure sensors or other diagnostic devices without the need to take the system out of operation. Where is a minimess connection used? This type of connection is used in: Pressure diagnostics: They allow for precise pressure measurements in hydraulic systems. Taking samples of the working medium: They enable safe extraction of hydraulic fluid for analysis. Control and maintenance: They facilitate the monitoring of system operating parameters, which helps in detecting potential problems and preventing failures.
Why choose EMA3 measurement connections at the Hydron store?
Hydron store offers EMA3 measurement connections, which are characterized by: High quality of workmanship: Products meet international standards and are made of materials with high durability. Wide range: The availability of various types of threads and sizes allows for matching connections to specific customer needs. Competitive prices: Attractive prices go hand in hand with the quality of the products offered. Professional advice: Hydron experts are ready to help in selecting the right components for your hydraulic systems. Order now and improve your work! We invite you to visit our website and familiarize yourself with the full offer of EMA3 measurement connections. Thanks to our products, you will ensure precise and reliable tools for the diagnostics of hydraulic systems, which will translate into efficiency and safety of your work.
Pressure measurement kits
Measurement connections are often components of pressure measurement kits. A kit consists of measurement connections, a test lead and a pressure gauge. Connector measurement kit is a common name under which these types of connections along with leads appear. Connections on one side are intended for screwing into a block, e.g., a pump, motor, cylinder, system - on the other side, an M16x2 connection with a hole for a "pin". The M16x2 thread is protected by a metal cap. Connections are available with metric and imperial threads. Special test leads for pressure gauges can be tightened to the connections. These leads have a crimped nut with an M16x2 pin on one side and usually have an internal thread for a pressure gauge on the other side.
Standard measurement connections
A standard measurement connection is a connection that has an external thread with a rubber seal on one side (this part is screwed into the machine, e.g., a pump) and an M16x2 external thread on the other side (for a test lead) which is protected by a special steel cap with a "needle" screwed on tightly to protect the connection. After unscrewing the cap, the oil flow is free. Available threads: metric, imperial (BSP), conical NPT. Measurement connections come in two versions: with an external thread (most popular) and with an internal thread (nut).
Gallery:
Measurement connections, diagnostic connectors M16x2 and MINIMESS for power hydraulic systems
Measurement connections, also known as diagnostic points, MINIMESS connectors or sampling points, are essential components of modern power hydraulic systems. They are used for quick, safe and leak-free connection of pressure gauges and flexible micro-hoses for current monitoring of operating pressure, bleeding the installation or taking hydraulic oil samples. A self-sealing poppet or ball valve integrated inside the body opens automatically when the test lead end is screwed on and closes immediately upon disconnection. This prevents loss of working fluid and protects the system against the ingress of dust and moisture. These components are commonly used in construction, agricultural and forestry machinery, presses and industrial high-pressure hydraulic power units.
Application and technical characteristics
Diagnostic connectors are designed for trouble-free operation in harsh operating conditions. Mounted in valve blocks, cylinder bodies, pipelines or tees, they enable permanent and periodic pressure monitoring in systems conveying mineral oils, synthetic oils, glycols or HFC fluids.
- Operating pressure and durability: Construction from high-grade galvanized steel or AISI 316 stainless steel allows for safe measurements at operating pressures reaching up to 630 bar.
- Connection threads and standards: Versions are available with metric threads from M10x1 to M16x1,5, BSP imperial threads from 1/8" to 1/2", as well as versions with NPT, UNF threads and GMA3 pipe tee connections.
- M16x2 measurement standard and plug-in: The most popular standard for micro-hose connection is the M16x2 external thread (EMA3 / MINIMESS), equipped with a screw-on metal or plastic cap, protecting the thread against mechanical damage and contamination.
- Tightness and sealing materials: The interior of the connection is sealed with NBR elastomers operating at temperatures from -30°C to +125°C or FKM Viton fluorine seals dedicated for temperatures from -25°C to +230°C.
- Diagnostics under full pressure: The internal valve enables safe connection and disconnection of control equipment during the machine's work cycle, without having to stop the pump.
Why choose HYDRON components?
Measurement connections supplied by HYDRON are produced based on strict ISO 15171-2 and DIN quality standards, which guarantees full interchangeability with measurement connectors from other valued diagnostic equipment manufacturers. Precise manufacturing of the shut-off valve and smooth thread finish prevent oil leaks and guarantee instant assembly of control leads. High-quality galvanizing provides long-term corrosion protection in environments exposed to moisture, dust and variable weather conditions. To create a complete diagnostic kit on a machine, we recommend selecting compatible elements from our range, such as flexible hydraulic hoses, precise test leads, pressure bottom entry pressure gauges and protective covers.
Technical specification
| Technical parameter | Value / Description |
|---|---|
| Element type | Measurement connection / diagnostic connector (MINIMESS) |
| Measurement part thread | M16x2 (EMA3), M16x1,5, S12,65x1,65 or plug-in |
| Screw-in threads (to the system) | Metric (M10x1 - M16x1,5), BSP Imperial (1/8" - 1/2"), NPT, UNF |
| Maximum operating pressure | up to 630 bar (depending on thread and material) |
| Body material | Galvanized free-cutting steel / AISI 316 stainless steel |
| Sealing material | NBR (standard) / FKM Viton (high-temperature option) |
| Operating temperature | -30°C to +125°C (NBR) / -25°C to +230°C (FKM Viton) |
| Execution standard | ISO 15171-2, DIN 2353 |
| Alternative designations | EMA3, GMA3, VKA3, MINIMESS 1620, Rapid System, Test Coupling |
Frequently Asked Questions (FAQ)
What is a measurement connection used for in a hydraulic system?
A measurement connection allows for quick connection of a pressure gauge or measurement micro-hose to measure pressure, bleed the system or take a sample of working oil. Thanks to the built-in valve, this activity takes place without oil leakage and without the need to turn off the machine.
What does the M16x2 standard mean in measurement connections?
The M16x2 thread (often referred to as EMA3 or MINIMESS 1620) is an international connection thread standard in power hydraulics. A female test lead end is screwed onto this thread after removing the metal or plastic protective cap.
Can a measurement connection be connected under full pressure?
Yes. The design of the internal poppet valve allows for safe and tight screwing of the test lead end under the full operating pressure prevailing in the hydraulic system.
What is the difference between NBR and FKM Viton seals in measurement connectors?
NBR seal is used in standard applications with mineral oils at temperatures up to +125°C. FKM Viton seal is chosen for applications working at high temperatures up to +230°C and when working with aggressive chemical media.