Passive sensors; send information back to the controller in terms of resistance/ohms.
The active sensor will send information back to the controller in terms of Milliamps, mA or Volts .
HVAC/R
active sensors are sensors that transmit some kind of energy ( microwave , sound , light , .... ) into the environment in order to detect the changes that occur on the transmitted energy . That means it transmits and detect at the same time . But passive sensors don't transmit energy but only detects the energy transmitted from an energy source, e.g. motion detectors which are mostly passive infrared sensors.
A detector only signals the presence. A sensor allows both signaling the presence and intensity of stimuli.
u can use a light sensor to meaasure the amount of light at first and in the end and find the difference between them.
sensors sense how things are running, to see if anything needs to be adjusted, send info to ECU, ECU then sends info to actuator then the actuators does something to deal with the problem... sensors - input, actuators - output.
A unique feature called Gravity Sensor that allows users to switch between the SIMs by rotating the handset to 360 degrees.
active sensors are sensors that transmit some kind of energy ( microwave , sound , light , .... ) into the environment in order to detect the changes that occur on the transmitted energy . That means it transmits and detect at the same time . But passive sensors don't transmit energy but only detects the energy transmitted from an energy source, e.g. motion detectors which are mostly passive infrared sensors.
Difference between active sensor and passive sensor Answer: Active transducers generate electric current or voltage directly in response to environmental stimulation. Examples of active transducers are thermocouples and piezoelectric accelerometers. Thermocouples produce a voltage related to a temperature of two metals and if the two junctions are at different temperatures, electricity is generated. Passive transducers produce a change in some passive electrical quantity, such as capacitance, resistance, or inductance, as a result of stimulation. These usually require additional electrical energy for excitation. A simple example of a passive transducer is a device containing a length of wire and a moving contact touching the wire. The position of the contact determines the effective length of the wire, varying the resistance of the length of wire. Other examples of passive transducers are strain gauges, resistance temperature detectors (RTDs), and thermistors Source:http://digital.ni.com/public.nsf/allkb/084702CE98679BB886256CA3006752D7
A network TAP is used in the US army, TAP stands for test administrative port there are 5 TAP features including passive. To allow your sensor to terminate unwanted connections you should change the TAP to active.
metal detector is sensor
Passive simply means that the unit does not emit IR light, but does detect it. All warm things emit some degree of IR. a PIR motion detector senses the difference between a warm body and the cold background. Active IR emits IR light to illuminate an area to be "seen" with it's CCD that is sensitive to IR. Most new Sony camcorders use active IR for "night vision". IR alone, with no modifier, simply refers to the spectrum of light known as Infra Red, which is slightly above human's vision range.
What_is_the_difference_between_proxy_switch_sensor
no difference. both are located underneath the car by the tranny.
I would say that they are one and the same.
same thing
It can recognise slower speeds than passive sensors. It can record down to 0mph as its a direct current whereas passive sensors produce alternating current and are only accurate down to around 25mph
One monitors pressure and the other monitors temperature.
Difference between wireless network and wireless sensor network?