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Siemens Mobility Limited
Sopers Lane, Poole, Dorset
BH17 7ER
Version
11
Page 17 of 117
Status
Issued
Last Editor
Jeerh, Manpreet
Date
March 2020
Document
Name
WIMAG GENERAL HANDBOOK
Doc. No.
667/HB/47200/000
Copyright
©
Siemens Mobility Limited 2012. All Rights Reserved.
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.
Figure 4 : Magnetometer Sensor
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
640/4/90028/000
Power Supply
• non-replaceable primary Li-SOCl2 3.6V
battery pack
• 7.2 Ah (nominal capacity)
Dimensions
7.4 cm x 7.4 cm x 4.9 cm
Weight
0.3 kg
Environmental
• designed for in-road mounting
• IP68 ingress protection
Operating Temp.
-40ºC to +85ºC
Table 1 : Magnetometer Sensor Specifications
1
1
Full data sheet may be found on the Sensys website :