User's Manual

Rev S-00001-20051010-1 Page 3 of 15
1 Overview
Congratulations for purchasing your Wireless Magnetic Sensor. This manual will support the
installation of both in-pavement and surface mount models of the sensor, VSN240-F and
VSN240-S respectively. The sensors use deviations in the earth’s magnetic field along three
axes, to determine the presence or absence of a vehicle at the sensors location. Event
information is then wirelessly transmitted back to an Access Point, AP240, which is responsible
for analysis and further reporting.
RF Specifications
• IEEE 802.15.4 Standard Compliant Radio
• 2.4 GHZ ISM Band
Physical Specifications
Table 1 VSN240-S
Measure Metric US
Length (L) 13.9 cm 5.35 inches
Width (W) 9.2 cm 3.6 inches
Height (H) 2.2 cm 0.9 inches
Table 2 VSN240-F
Measure Metric US
Length (L) 7.4 cm 2.9 inches
Width (W) 7.4 cm 2.9 inches
Height (H) 4.9 cm 1.9 inches
Durability
• VSN240-F – Expected lifetime of 8 to 11 years, depending on traffic volumes.
• VSN240-S – Expected lifetime of 5 to 7 years, depending on traffic volumes.
Environmental
• Nema 6P / IP 68
• Temperature Range: -40°C to +80°C