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Rapid Pass Native name র্যাপিড পাস Location Dhaka, Bangladesh Launched 4 January 2018 (2018-01-04) Technology Near field communication Contactless smart card Operator Dhaka Transport Coordination Authority Manager Dhaka Transport Coordination Authority Currency BDT (৳100 minimum load, ৳2000 maximum load) Stored-value e-purse Credit expiry None Auto recharge No ...
An optical sensor can measure the changes from one or several light beams. When a change occurs, the light sensor operates as a photoelectric trigger and therefore either increases or decreases the electrical output. An optical switch enables signals in optical fibers or integrated optical circuits to be switched selectively between circuits ...
Conceptual through-beam system to detect unauthorized access to a secure door. If the beam is interrupted, the detector triggers an alarm. A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are largely used in ...
A digital sensor system consists of the sensor itself, a cable, and a transmitter. The differences with analog sensor systems are: a) The sensor has an electronic chip. The measuring signal is directly converted into a digital signal inside the sensor. The data transmission through the cable is also digital.
Before modern electronic sensors, early detection methods relied on less precise detectors. Through the 19th and early 20th centuries, coal miners would bring canaries down to the tunnels with them as an early detection system against life-threatening gases such as carbon dioxide, carbon monoxide and methane. The canary, normally a very songful ...
A chemical sensor array is a sensor architecture with multiple sensor components that create a pattern for analyte detection from the additive responses of individual sensor components. There exist several types of chemical sensor arrays including electronic, optical, acoustic wave, and potentiometric devices.
Singer Bangladesh: Savar, Dhaka: Home appliance [25] 15 Techshop Bangladesh: Motijheel, Dhaka: Robotic & Electronics [26] 16 5 Star Mobile Bangladesh: Smartphone and feature phones: 17 Xiaomi, Redmi and POCO (Technical Collaboration with DBG Technology BD Ltd.) Gazipur: Smartphones: 18 Nokia-HMD (Technical Collaboration with Vibrant Software)
The presence of combustible gas will reduce the intensity of the sample beam and not the reference beam, with the difference between these two signals being proportional to the concentration of gas present in the measuring path. The other 50% of the overlapped signal passes through the beam splitter and onto the compensation detector. The ...