ZELT for cars sensor
Developed, tested and patterned by the CETE Sud Ouest since 1999, adapted and validated by Eco-Counter, the ZELT Inductive Loop Sensor is a great innovation. Designed to count bikes, we adapt it to count cars as well. This loop provides a low consumption alternative with a battery life of 1 year.
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Operating Principle
An inductive loop is inserted in the road (2 to 5 cm). Each time a car goes over the loop, the system detect the wheels electromagnetic signature and make a count.
The loop has a length of 1.5 m. It is possible to joint up to 4 loops. Discrete because inserted in the road, the sensor is almost completely invisible. This reduces the risk of vandalism. A 7.2V lithium-ion battery allows autonomy of 1 year. The system can be used for permanent or semi-permanent counting. The sensor can also be used punctually.
Applications
ZELT inductive loops for vehicles
>Cars counting on asphalt or dirt road

>Counting at the entrance of a parking lot
Technical specifications
>Embedded Inductive Loop :
Diamond-shaped loop
150 x 47 cm (59 x 19 in)

>Transducer :
Waterproof electronic case
13 x 10 x 3 cm (5 x 4 x 1 in)

>Power supply :
Two 3.6v - 17 A/h batteries with
waterproof case or 6 to 9 volt
power source.

>Battery life :
1 year with 7.2 Volts / 17 A/h

>Working temperature :
1 kg (2,2lbs)

>Working temperature :
-20 °C to + 60 °C
(-20° F to 140° F)

>Minimum cabinet size :
30 x 30 x 20 cm
(12 x 12 x 8 in)
Power
The sensor is delivered with a 7.2V lithium battery for a battery life of 1 year for one or two loops. A 6V alkaline battery can also be used for a battery life of 6 months. The loop could also be plug to an electric supply.
When the battery reaches a critical level, a light will flash.
Sensibility
All cars that have metal in the wheel frame (Almost all models). Some slow moving 2 wheel motorised might be counted rarely.
Accuracy
5 % according to the quality of the installation and the type of flow.
Settings
The sensibility and timer are set in the factory.
Installation
Plan between one and 2 hours to install one loop on an asphalt road.
One System includes
>1 or 2 inductive loop

>1 ZELT transducer

>1 Eco-Pilot or Eco-Twin Logger

>1 7.2V Lithium battery
Ground preparation
The sensor is connected to the logger by 4m of cable (other lengths available on request).
Power cutters (diamond disk) must be used in order to cut the asphalt.
Do not forget to dig a trench for cable and post for the cabinet.