The float is a key component in level switches. It uses a floating element that follows the liquid level inside a tank and activates a reed sensor through the magnet inside it. This principle is widely used for level control in tank level indicators. Level probes detect liquid level variations through a magnet-equipped float that moves along a tube. Inside the tube, there is a chain of reed sensors, which provides a signal proportional to the float’s position.
Level sensors detect the presence and quantity of a fluid using various technologies, such as the float principle, electrical conductivity, or capacitive and ultrasonic methods. For example, float level sensors use the position change of a floating element to trigger a signal, while ATEX level sensors are designed for explosive-risk environments.
A level switch is a device used to monitor and control the level of a liquid inside a tank or an industrial system. These instruments enable efficient fluid management in sectors such as HVAC, Oil & Gas, food industry, and industrial automation.
The operation of a pressure transducer is based on the conversion of the force exerted by a fluid on a sensitive element, such as a piezoresistive element, into a proportional electrical signal. This signal is amplified and transmitted to an acquisition or control system, where it is processed to optimize the system’s operation. Depending on the technology used, the output signal can be either analog or digital, with calibration and thermal compensation options to ensure maximum accuracy under all operating conditions.
A pressure transducer is designed to provide a reliable and repeatable measurement of a fluid’s pressure within a system. It is used for industrial process regulation, monitoring of critical installations, and verifying the operating conditions of hydraulic, pneumatic, and thermodynamic systems.
In pressure transducers, the measured physical quantity is the fluid pressure, which is converted into an electrical signal interpreted by a control system or a data acquisition unit.
Transducers are devices that convert a physical quantity into a proportional electrical signal, used for monitoring and controlling process parameters. Their function is essential in industrial applications where measurement accuracy directly affects system performance.
The pressure switch activates when the fluid pressure exceeds or falls below the preset threshold. In adjustable pressure switches, the activation value can be set manually, while in electronic pressure switches, the threshold can be configured digitally. The activation of the pressure switch can turn a device on or off, such as a pump or a compressor, to keep the pressure within safe limits and ensure the proper operation of the system.
There are different types of pressure switches, designed to adapt to specific industrial applications. Mechanical pressure switches activate an electrical contact through a diaphragm or a piston when the pressure reaches the preset value, making them suitable for hydraulic and pneumatic systems. Electronic pressure switches and digital pressure switches use advanced sensors for more precise pressure control and offer a programmable interface for configuring operating parameters, making them ideal for automated applications. Adjustable mechanical pressure switches allow the intervention value to be modified directly on the device using adjustment screws or graduated knobs, adapting to hydraulic systems, water pressure switches, oil pressure switches, and industrial circuits. Differential pressure switches measure the pressure variation between two points and are used for monitoring filters and HVAC systems. Elettrotec is one of the leading manufacturers of mechanical pressure switches and differential pressure switches, providing tailor-made solutions for high-precision systems and complex applications.
If a pressure switch does not function properly, the system may experience malfunctions or damage, depending on the application. In pumping systems, it could lead to pressure overload or system shutdown. In hydraulic or pneumatic circuits, a failure of the pressure switch can compromise safety, preventing intervention in case of excessive or insufficient pressure.
A pressure switch is a device that monitors the pressure of a fluid (liquid or gas) within a system and switches an electrical circuit on or off when a predefined value is reached. It is used to regulate the operation of pumps, compressors and other industrial systems, ensuring safe and efficient pressure control.
To connect your pressure switch to the electric circuit, identify your pressure switch model and download the corresponding datasheet from our website.
Setting up your pressure switch is simple with our dedicated guides. For pressure switches with adjustable hysteresis, refer to our specific guide. For other pressure switch models, we have a comprehensive guide to help you step by step. Remember, a pressure gauge or a pressure transducer is necessary for fine-tuning.
Installing the brass bushing is essential for securing the screw that holds the protective cap in place.
Installing the flow switch in a horizontal position can affect its performance. In this position, the force generated by the weight of the shutter is eliminated, leaving the task only to the compensation spring. This means the flow switch may activate at flow rates approximately 20% lower than the actual graduated scale. Additionally, the formation of limescale or other encrustations could hinder the free movement of the shutter.
Follow these simple steps to set up your flow switch:
If your component begins to leak after one or two years of normal operation, it could be due to a punctured membrane. Under normal conditions, fluid should not pass through the membrane. Here are several possible reasons for membrane failure:
This issue is likely due to an incorrectly set hysteresis screw. To correct the commutation, please follow the steps outlined in our guide.
If your electrical flow switch is not commuting, consider the following potential causes and solutions:
You can obtain 3D models of our products free of charge from this link. Please note that a PARTcommunity account is required to access the models.
Yes, we offer customization options for our products. Whether through laser marking or printed labels, we can add your custom logo to meet your branding needs.
Certainly! We specialize in designing and manufacturing custom products tailored to your unique specifications. Whether you need a small batch or a larger production run, we are equipped to meet your needs.
You can find the most requested certificates and declarations here.
Yes, we can help. Please send an email Click here to contact us by email. and include all the available information such as the product code, order date, certificate type, and order quantity. We will send you a copy of the original certificate as soon as possible.
The 3.1 certificate must be requested before production. A special code will be created to link the production batch to the certificate.
According to the PED 2014/68/EU directive, our products are considered “pressure accessories” and are classified in Category I.
They are designed and manufactured according to good engineering practices and meet the essential safety requirements outlined in Annex I. They undergo conformity assessment following Module A – Internal Production Control, as indicated in Annex III.
Therefore, our products can be considered PED compliant. We are in the process of preparing a declaration of conformity to confirm this.
The overall functionality of the pressure switch is our priority, and extreme temperatures can affect its reliability and accuracy. While the membrane may resist higher or lower temperatures, the entire pressure switch may not perform optimally in these conditions. Therefore, we set temperature thresholds to ensure consistent and reliable performance of the pressure switch as a whole.
The MTTF (Mean Time To Failure) of our products, according to EN ISO 13849-1, depends on their usage, specifically the number of cycles per year.
In our case, the MTTR is negligible because the component is typically replaced if it fails. The MTTF calculation can be related to the MTTFd (Mean Time To Dangerous Failure), which indicates the average time before a dangerous failure occurs. For pressure switches, according to EN ISO 13849-1, the formula is:
MTTFd = B10d / (0.1 * nop)
Where:
Example for Pressure Switches:
For a current >20mA: MTTFd = 100,000 / (0.1 * nop) = 10^6 / nop
The customer can calculate the MTTF by inserting the expected number of cycles per year for their application.
For example, if the pressure switch operates once per minute: nop = 1 * 60 * 8 * 220 = 105.600 cycles/year MTTFd = 106 / 105.600 = 9,47 years
Example for Level Switches:
For LM1…XIA, considering the low voltages and currents, we estimate 10^5 cycles for safety. MTTFd = 100.000 / (0.1 * nop) = 106 / nop
For example, if the level switch operates once every 10 minutes: nop = 1 * 8 * 6 * 220 = 10.560 cycles/year MTTFd = 106 / 1760 = 94 years