| environ. |
sensor The generic name for a device that senses either the absolute value or a change in a physical quantity such as temperature, pressure, flow rate, or pH, or the intensity of light, sound, or ratio waves and converts that change into a useful input signal for an information-gathering system; detector A mechanical, electrical, or chemical device that automatically identifies and records or registers a stimulus, such as an environmental change in pressure or temperature, an electrical signal, or radiation from a radioactive material |
