Sensor Types

There are many types of sensors. When configuring a sensor (see sensor properties), the selection of sensor type depends on the device used and its principle of operation.

The table contains all sensor types currently available in the Wialon system. Moreover, here you can find units of measurement for the sensor values (either in metric or American/imperial systems), as well as a short description for each sensor type.

Mileage

The name of the sensor Metrics Description
Mileage sensor kilometers
(km)
miles
(mi)
The sensor shows the distance traveled. It can be used to detect trips and parkings.
Relative odometer kilometers
(km)
miles
(mi)
The sensor shows the distance traveled since the previous message. It can be used to detect trips and parkings.

Digital

The name of the sensor Metrics Description
Engine ignition sensor On/Off
or any
This is engine operation sensor that is used in the report on engine hours as well as in trips/stays detection and counters. It also allows to configure the fuel consumption during idling.
Alarm trigger Sensor which non-nil value allows marking a message as an alarm message (SOS).
Private mode On/Off
or any
This sensor is used to determine trip type (Business, Private).
Real-time motion sensor On/Off The sensor determines unit motion state in real time. Its values are used to show the motion state in the Monitoring panel and on the map (if the Replace unit icons with motion state signs option is activated in the User Settings dialog). The sensor can be based on such parameters as speed, ignition, engine revolutions, etc. Its parameter can contain formulae, which allows using validation.
Custom digital sensor On/Off
or any
This sensor can register two states (on/off, activated/deactivated, etc.).

Gauges

The name of the sensor Metrics Description
Voltage sensor volts
(V)
The sensor shows some parameter value (not necessarily voltage). It can be used to analyze input data.
Weight sensor tons
(t)
pounds
(lb)
This sensor is used to detect weight of transported cargo.
Accelerometer g This type of sensor is used to measure acceleration at X, Y, Z axes and immediately detect a collision of cars.
Temperature sensor Celsius degrees
(°C)
Fahrenheit degrees
(°F)
The sensor shows the value of temperature or some other parameter. It can be used to analyze input data. See the example of configuration.
Temperature coefficient Temperature coefficient that affects fuel level calculations at different temperature in the tank. See the example of configuration.

Engine

The name of the sensor Metrics Description
Engine revs sensor rounds per minute (rpm) The sensor displays engine speed.
Engine efficiency sensor any The sensor determines the coefficient when working under load used for the mathematical calculation of the fuel consumption. Can function as a reduction coefficient if its values are between 0 and 1.
Absolute engine hours hours The sensor registers the total amount of engine hours. It also allows to configure the fuel consumption during idling.
Relative engine hours hours The sensor registers the number of engine hours with regard to the intensity of work. See the example of configuration. It also allows to configure the fuel consumption during idling.

Fuel

The name of the sensor Metrics Description
Impulse fuel consumption sensor liters (l) gallons (gal) The sensor shows the accumulated value of impulses. To convert the incoming value into the amount of consumed fuel, the calculation table should be applied. For such sensor type the calculation table is applied to the difference between two adjacent messages. After sensor creation and adjustment it is necessary to enable impulse fuel consumption sensor on the corresponding tab.
:!: Note that if a device sends not an accumulated value of impulses, but the number of impulses between the messages, it is necessary to use instant fuel consumption sensor.
Absolute fuel consumption sensor liters (l) gallons (gal) The sensor detects fuel consumption over all period of vehicle operation. After sensor creation and adjustment it is necessary to enable absolute fuel consumption sensor on the corresponding tab.
Instant fuel consumption sensor liters (l) gallons (gal) The sensor shows fuel consumed from the previous measure (message). After the sensor creation and adjustment it is necessary to enable instant fuel consumption sensor on the corresponding tab.
Fuel level sensor liters (l) gallons (gal) This sensor is placed in the tank. After sensor creation and adjustment (see examples) it is necessary to enable fuel level sensor on the corresponding tab.
Fuel level impulse sensor liters (l) gallons (gal) The sensor detects the number of impulses in a period. Fuel level in the tank is calculated from the received values.

Other

The name of the sensor Metrics Description
Counter sensor any The sensor can show passenger traffic or count the number of some actions such as opening/closing the door, etc. There are several types of counters:
— instant (counts the number from the previous to the current message),
— differential (shows total number), differential with overflow (2 bytes),
— switcher from OFF to ON (counts the number of activations),
— switcher from ON to OFF (counts the number of deactivations).
Besides, you can enter any unit of measurement for this sensor.
Custom sensor any This is a custom sensor for which you can set any unit of measure. Its values can be displayed in the unit tooltip, in the extended unit information or sent to report.
Driver binding This sensor can be used to detect drivers assigned to units.
Trailer binding This sensor can be used to detect trailers attached to units.
Passengers sensor This sensor supports detection of passengers entering and leaving a vehicle.
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