Trafag Archives – Varga Elektronik

Sheltering solutions for Trafag’s gas density monitors

Post author:Varga Elektronik
Post published:18. December 2023.
Post category:2023 Trafag

Sheltering solutions for Trafag's gas density monitorsTrafag density monitors are utilized globally in diverse climates, ranging from high-altitude mountains to desert landscapes. In outdoor settings, the instruments face particularly demanding requirements. They must withstand extreme temperature fluctuations, intense solar radiation, rain, snow, humidity, and sandstorms, all of which can impact their performance. As high-precision instruments, density monitors play a crucial role in ensuring the safety of high-voltage installations.Trafag density monitors are utilized globally in diverse climates, ranging from high-altitude mountains to desert landscapes. In outdoor settings, the instruments face particularly demanding requirements. They must withstand extreme temperature fluctuations, intense solar radiation, rain, snow, humidity, and sandstorms, all of which can impact their performance.…

How does a pressure transmitter work?

Post author:Varga Elektronik
Post published:31. October 2023.
Post category:2023 Trafag

https://player.vimeo.com/video/846302072?title=0&byline=0&portrait=0 To understand how a pressure transmitter works, it is enough to concentrate on its two key elements: one is the pressure sensor that captures the pressure of the medium and converts it into an electrical signal. The other is an application-specific integrated microchip. It is needed to convert the generated electrical signal into a normalized output signal. Pressure sensor The pressure sensor consists of a thin film-on-steel cell (Figure 1) in which the resistance bridges are applied to the surface of a steel sensor element as a thin film. This thin film is only a few atomic layers thick. When pressure is applied to the pressure sensor, its membrane deforms at predefined…

Hydraulics

Post author:Varga Elektronik
Post published:10. July 2023.
Post category:2023 Trafag

Reliable pressure measurement under harsh conditions Pressure sensors for hydraulic applications - sometimes also called pressure transmitters or pressure transducers, (see also Pressure transmitters) measure the pressure of the medium hydraulic oil in valves, pumps, cylinders and pressure accumulators, etc.. They are therefore central elements for the control and regulation of hydraulic systems. These systems are often components of large and expensive machines or plants, where a standstill or even failure would have far-reaching consequences. For this reason, pressure transmitters for hydraulics must always function reliably - even under harsh conditions. Therefore, the robust design is very important. Hydraulic applications are divided into two categories: The category of stationary hydraulics includes areas of…

Absolute electronic insulating gas density measurement based on the oscillating quartz principle

Post author:Varga Elektronik
Post published:12. June 2023.
Post category:2023 Trafag

Starting in the mid-90s, Trafag introduced gas density sensors. They are the first choice when continuous and long-term, drift-free insulating gas density measurement and data acquisition are required. Exposure of an oscillating quartz to gases of different densities causes a shift and damping of the resonant frequency. The insulating gas densities of SF6 as well as those of alternative insulating gases can thus be measured directly and electronically. The operational reliability and operational safety of gas-insulated high-voltage switchgear can only be guaranteed if the required gas density in the pressure compartments is maintained. Leakage would endanger the safety of the switchgear and at the same time violate environmental regulations. SF6 in particular is…

NAI 8273 IO-Link Pressure Transmitter and Switch

Post author:Varga Elektronik
Post published:7. June 2023.
Post category:Trafag

NAI 8273 IO-Link Main features Pressure measuring accuracy 0.3 %, 0.5 % Media and device temperature measurement COM3, min. process cycle time 1 ms 2 Switching outputs PNP/NPN configurable Optional: 5-fold overpressure resistance About The NAI 8273 IO-Link pressure transmitter is designed as a smart sensor and provides application-relevant information in addition to the process data. The process data contains the pressure value and the media temperature, which is measured directly at the exceptionally long-term stable thin-film-on-steel pressure sensor cell. The small sensor dimension combined with the pressure and temperature value of the media make the NAI 8273 the ideal choice in various applications. For the use of the conventional switching outputs, the…

High-precision monitoring of the insulating gas density with reference gas comparison

Post author:Varga Elektronik
Post published:6. June 2023.
Post category:2023 Trafag

High-precision monitoring of the insulating gas density with reference gas comparison The reference gas comparison principle was developed and patented by Trafag in the 1980s - and has become the leading industry standard for insulating gas density monitoring in high-voltage technology. If density monitoring must meet high requirements for reliability, accuracy, stability and durability, there is no way around is this fully temperature-compensated principle. Gas density monitoring: temperature compensation is a must Density measurement in pressurized, gas-insulated chambers is all about physics, because pressure, density and temperature have a specific relationship. The relationship is defined by isochores (constant change of state) for each specific insulating gas. The insulating performance of a gas-insulated chamber…

Components of a pressure transmitter

Post author:Varga Elektronik
Post published:8. February 2023.
Post category:2023 Trafag

A pressure transmitter measures the physical quantity of pressure in liquids or gases and provides the measured value as an electrical signal. The interactive graphic on this page guides you to the most important information about the key elements of a pressure transmitter: In addition to the main functional design elements, these are the interfaces to the environment, the most important criteria for selecting a proper pressure transmitter and the most important performance characteristics. The core elements of a pressure transmitter are the measuring cell, i.e. the sensor in the closer sense, the process connection; the electronics for signal processing; the electrical connection as well as the enclosing housing. Trafag pressure sensors are…

Temperature monitoring

Post author:Varga Elektronik
Post published:4. November 2022.
Post category:2022 Trafag

For 70 years Trafag thermostats have proven their robustness in order to withstand the most adverse environmental conditions. Industry usage ranges from air conditioning applications to engine and ship manufacturing and even to offshore oil and gas platform production. The appeal of Trafag thermostats lies in their high switching point precision even after decades of operation under harsh conditions without maintenance. Trafag thermostats are available in various sensor and housing versions, with various Ex and ship approvals as well as in railway-compliant versions. Measuring principle A capillary tube filled with liquid reacts to a temperature change as a result of the principle of thermal expansion. This expansion is detected using a precision structure…

FPT 8236 Flush Membrane Transmitter

Post author:Varga Elektronik
Post published:4. July 2022.
Post category:2022 Trafag

Main features Flush membrane with smooth and plain surface Membrane in Duplex steel 1.4462 Completely welded sensor system Excellent long-term stability About The FPT 8236 pressure transmitter impresses with an absolutely smooth and robust flush-mounted measuring diaphragm made of corrosion-resistant duplex steel. Trafag’s proprietary thin-film-on-steel sensor technology ensures a wide temperature range and excellent long-term stability. Technical Data Product code: 8236 Name: FPT Designation: Flush Membrane Transmitter Measuring principle: Thin-film-on-steel Applications: Food Industry, Hydraulics, Machine tools, Process technology, Water treatment Accuracy @ 25°C typ.: ± 0.5 % FS typ. Output signal: 4 ... 20 mA, 0 ... 5 VDC, 1 ... 6 VDC, 0 ... 10 VDC, 0.5 … 4.5 VDC ratiometric Electrical…

Pressure and temperature monitoring for hydraulic applications

Post author:Varga Elektronik
Post published:12. January 2022.
Post category:2022 Trafag

Applications in mobile and stationary hydraulics are among the most demanding in terms of robust and reliable sensor requirements. Trafag pressure transmitters are used in applications from high accuracy test benching to heavy construction and agricultural equipment. They are proven for long term stability in extremely harsh environments from the dusty heat of deserts to the icy cold of sub-arctic forests. The reliable pressure transmitters with great long-term stability are highly prized for stationary hydraulics as well, for they avoid costly production interruptions. Agricultural and forestry machinesTractors, harvesting machines, transport machines Renewable energiesRotor control in wind power plants, solar tracking for photovoltaic systems Construction machinesExcavators, mobile cranes, concrete pumps and mixers Communal and…

Picostat pressure switch – 9R5

Post author:Varga Elektronik
Post published:6. September 2021.
Post category:2021 Trafag

The 9R5 of the Picostat series is based on our long lasting experience in the railway sector. The new Picostat generation with improved performance and new design meets the demanding requirements of rail vehicle applications. Main features Stainless steel housing Stainless steel bellow sensor, welded Compact design Rugged housing Meets EN 50155 (Railway) Technical Data Product code: 9R5 Designation: Picostat Railway pressure switch Measuring principle: Steel bellow welded Applications: Railway Approval / conformity: EN 50155 (Railway), EN 45545-2 (Fire protection), EN 61373 (Shock, vibration), EN 60730-1/ EN 60730-2-6: type 2.B.H Output signal: 1 Floating change-over contact (SPDT) Electrical connections: EN 175301-803-A (DIN 43650-A) Media temperature: –40°C ... +85°C Ambient temperature: –40°C ... +85°C…

Trafag revolutionises the measuring of highly dynamic pressure curves with ASIC

Post author:Varga Elektronik
Post published:5. March 2021.
Post category:2021 Trafag

Trafag has succeeded in unifying the highly dynamic response behavior of a test bench sensor and the extreme robustness of a mobile hydraulic pressure transmitter by combining thin-film-on-steel measuring cells and an ASIC developed in-house. The Trafag ASIC TX with an innovative parallel mixed-signal structure is the key to a response behaviour at nearly unlimited speed. In many applications, above all in the testing field, the aim is to record highly dynamic pressure curves, e.g in order to analyse the opening and closing performance of valves, track pressure curves of explosions and explosive pressure expansions or to examine brief pressure peaks in hydraulic systems. Transmitters for industrial applications on the market are generally…