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3 System Elements – Common WiMag Detection
Equipment
3.1 Magnetometer Sensor
The magnetometer sensor is a loop equivalent product that utilises disturbances in the
magnetic field to detect passing and/or stationary vehicles.
The sensor is a wireless in-road magnetometer. It has an inbuilt low-power wireless
transmitter/receiver and a dedicated battery. The battery is designed to have a life
expectancy of at least 10 years. The sensors will continuously self-calibrate so that the
earths magnetic fluctuations are always considered as part of the detection decision.
The magnetometer sensor is manufactured by Sensys Networks Inc. Siemens supply the
VSN240-F variant, which can be used for both road and stop-line applications.
Configuration of this device is performed through the access point (reference section 0
below).
Siemens Part Number
Power Supply
Dimensions
Weight
Environmental
Operating Temp.
1
Full data sheet may be found on the Sensys website :
Version
11
Last Editor
Jeerh, Manpreet
Document
WIMAG GENERAL HANDBOOK
Name
Copyright © Siemens Mobility Limited 2012. All Rights Reserved.
Figure 4 : Magnetometer Sensor
640/4/90028/000
• non-replaceable primary Li-SOCl2 3.6V
• 7.2 Ah (nominal capacity)
• designed for in-road mounting
• IP68 ingress protection
Table 1 : Magnetometer Sensor Specifications
Page 17 of 117
battery pack
7.4 cm x 7.4 cm x 4.9 cm
0.3 kg
-40ºC to +85ºC
http://www.sensysnetworks.com/
Status
Date
Doc. No.
Siemens Mobility Limited
Sopers Lane, Poole, Dorset
BH17 7ER
1
Issued
March 2020
667/HB/47200/000
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