The reed switch is an electrical switch operated by an applied magnetic field. It consists of a pair of contacts on ferrous metal reeds in a hermetically sealed glass envelope. MEDER electronic designs and manufactures innovative reed switch based products that serve a broad range of markets, including Automotive, Aviation, Agriculture, Test & Measurement, Medical, Telecommunications, Industrial, Household, Security and Marine. Reed Sensors can be used in an infinite number of sensing applications. The key component in the reed sensor is the reed switch. The other major component is the magnet or electro-magnet used to open or close the reed switch. They have become the design-in choice in several critical applications where quality, reliability and safety are paramount.
Perhaps the most dramatic application and testimony of the reed's quality and reliability is its use in Automatic Test Equipment (ATE). Here this technology is used exclusively. The reed switches are used in reed relays, switching in the various test configurations for integrated circuits, ASICs, wafer testing and functional printed circuit board testing. For these applications up to 20,000 reed relays may be used in one system. Here one relay failure constitutes a 50-ppm failure rate. Therefore to meet this requirement, the reed relays need to have quality levels much better than 50-ppm. Heretofore, it was unheard of to have an electromechanical device with this quality level. Similarly the same holds true for several semi conductor devices as well. Once beyond the initial operational quality testing, the reed relays then need to perform well over life. Here they have been proven to out perform all other switching devices. Because, in many cases the automatic test equipment is operated 24 hours a day and 7 days a week to fully utilize its high capital expense; and therefore, billions of operations may be required during the reed relay's lifetime. Another example of its favored use is in air bag sensors, where they have passed the test of time in a crucial safety application. Reed sensors are currently used in many critical automotive safety equipment (brake fluid level sensing, etc.), along with many medical applications including defribulators, cauterizing equipment, pacemakers and medical electronics where they isolate small leakage currents.
Reed Relays are used in many types of medical equipment that require high current and/or high voltage. For Example; Cleaning equipment, Drug dispensing systems, Electrosurgical generators, EKG equipment, Insulin pumps, and Intravenous pumps.
Equipment such an electrosurgical generator requires a high voltage relay to aid in regulating the right amount of current used to cauterize vessels during surgery. Similar equipment may use RF energy combined with saline to seal off vessels therefore high frequency relays would provide a maker solution.
The CSP120 SiP (System-in-a-Package) solution comprises of an ultra-small capacitive MEMS pressure sensor and a conditioning ASIC for accurate pressure measurements in the 70kPa to 110kPa range. An integrated sigma-delta based ADC combined with internal calibration logic provides fully compensated temperature and pressure measurements to the application via the SPI or I²C interface. There is no need to separately download internal calibration coefficients and have the host microcontroller conduct complicated compensation calculations. The compensated values are simply scaled to produce highly accurate, compensated pressure and temperature measurements. Two selectable modes (Normal and Sleep) and an external "Measurement Ready" pin ensure operational flexibility suitable for an unlimited range of applications.
The SSC standard product family interfaces with two main sensor types: resistive bridges and differential capacitors. For a particular sensor type, further specialization targets the optimal performance and price point for the required operating voltage and temperature range, gain and resolution, input/output format, and qualification level. Refer to the chart below for more details on the available options and features.
Precision Sensor Signal Conditioner ICs with built-in correction and first-pass calibration. Designing sensor interfaces for nonlinear, temperature-dependent transducers can be quite challenging and time consuming, and producing them in volume is often expensive due to long test cycles on costly production test equipment. ZMDI Sensor Signal Conditioner ICs facilitate both design and production of sensor interfaces by providing highly accurate, widely programmable gain and quantization functions combined with powerful, high-order digital correction and linearization algorithms, all in one energy-efficient product that is easy to use and supported by expert software and sensor system design experience. A distinct advantage of our correction algorithms is that they are calibrated and programmed in an efficient "single-pass" operation that lowers costs by reducing test time and loading of production test equipment without sacrificing precision.