NSL-4960

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The NSL-4960 is an ambient light photo detector that features a silicon photodiode, providing ultra-sensitivity and low temperature operation. This unit is ideal for a wide range of applications, such as industrial process control, medical equipment, scientific instrumentation, and security/building automation systems. Within the area of optical sensors, the NSL-4960 falls within the category of Photo Detectors and more specifically CdS Cells. CdS (Cadmium sulphide) Cells are a type of photoresistor that operates on the principle of changing its electrical resistance in response to the amount of light that falls on it. The output of a CdS cell is an analogue electrical signal that is proportional to the incident light intensity.The NSL-4960 uses a Cadmium Sulphide Coated Silicon Photodiode as its active component. The Silicon Photodiode is a device that produces a current proportional to incident light intensity and due to its small size, it is well suited for a wide range of applications. The Cadmium coating offers an additional enhanced sensitivity in dark and near-infrared applications, as well as improved isolation and dynamic range.The NSL-4960 is capable of operating over a wide range of temperature and power supply options, with typical dark currents ranging from 0.5nA to 4nA. This allows for a very wide operational range making the unit suitable for light-level sensing applications in both low level applications and in high-contrast areas. In addition, the NSL-4960 has been designed to have low temperature drift, making it suitable for applications requiring tight and accurate control of light in temperature extreme conditions.Overall, the NSL-4960 provides a versatile solution for light level sensing applications, and due to its features and small size, it is ideal for embedded systems and portable industrial/medical instruments.The NSL-4960 has an output range of 0 to 0.7V, and a maximum response time of 10 ms. The device is available in a plastic DIP package and is rated for an operating temperature range of -40°C to +85°C. The NSL-4960 has an operating voltage of 5V and its current draw is less than 10µA.The working principle of the NSL-4960 is based on the photovoltaic effect, where light produces a voltage across two oppositely charged layers of material when radiation is absorbed. When light hits the Cadmium Sulfide (CdS) coated Silicon Photodiode, the CdS absorbs the light and causes an electric field to be generated. This produces a voltage across the two ends of the Photodiode, which is output as a signal on the NSL-4960. The output of the NSL-4960 depends on the intensity of the radiation and the calibration settings of the device. The output voltage of the NSL-4960 typically ranges from 0V (dark) to 0.7V (full-on) depending on its application.The NSL-4960 is a reliable and high performing ambient light photo detector and has numerous application possibilities in areas such as industrial process control, medical equipment, scientific instrumentation, and security/building automation systems. Moreover, the NSL-4960 is a highly cost-effective solution, making it an ideal choice for a variety of demanding light sensing applications.

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