Riedon resistors are used in the world’s finest microphones!
Written by Frieda Thursday, 2 September 2010 11:22
TELEFUNKEN Elektroakustik produces the world’s finest microphones currently available in the world today -
Telefunken has selected Riedon as their supplier for their resistor needs. We welcome Telefunknen as one of our new customers!
CommentsTermination Resistors for 4-20 mA Industrial Instrumentation
Written by Frieda Tuesday, 24 August 2010 12:32
Modern industrial automation applications demand high performance instrumentation. A well-established technique is to use 4-to-20 mA current-mode transmission (rather than voltage signal) between process sensors and data-processing system elements. This method is less susceptible to the electrical noise problems common in industrial automation and control system applications.
However, modern data-processing components are typically designed for voltage inputs, especially those based on digital technology. The 4-20 mA signals from remote sensors must be converted to voltage level signals, typically 0 to 5 volts, for compatibility with these components.
This conversion is relatively simple requiring only a resistor (Figure 1). Obviously, the accuracy of the current-to-voltage conversion depends upon the precision of the resistor. Riedon precision resistors are ideal for this application:
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RoHS Compliances in Other Countries
Written by riedon Monday, 9 August 2010 12:25
You are probably aware that the Restriction of Hazardous Substances (RoHS) in the United States and European Union restrict the use of certain metals and substances in commercial products. These restricts are typically found on lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ether. These limitations on the use of such substances are designed to protect individuals and the environment. In other countries similar restrictions have been adopted on appliances, tools, consumer electronics, toys and medical devices.
In Canada, for example, a provincial electronics recycling program has been in place since 2004. Electronics are typically sold with an upfront recycling fee of up to $45. China’s RoHS took effect in 2007 and restricts the use of mercury, cadmium, lead and hexavalent chromium in the use of future electronic manufacturing. In South Korea, similar legislation began being enforced in the same year.
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