The Guardian

The Guardian
Retail Price: £99.99 Inc. VAT (UK & ROI Only)
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Dimension(L×W×H) 80×56×22mm
Weight 50g
Network GSM/GPRS
GPS Sensitivity -159dBm
GPS chip SIRF3 chip
GPS accuracy 5m
External power DC5V
GSM Band 850/900/1800/1900 Mhz
Battery 3.7V 860mAh lithium battery
Battery standby time 100 hours
Storage Temp -40°C to +85°C
Operating Temp -20°C to +55°C
Humidity 5%--95% non-condensing

Not all trackers are the same. When we looked for a tracker that was potentially going to be used to track people we some parameters.

  • To give the best chance of an accurate result the GPS arial must be pointing at the sky.
  • The device had to be robust and ergonomically friendly with a big SOS button that would not cause false alarms often.
  • It had to be waterproof enough still to function in rain, having fallen into a puddle or stand total immersion for at least ten minutes.

We rejected wristwatch type trackers as the device could be pointing anywhere at any time. Instead we wanted one on a lanyard that could be worn around the neck.

The Guardian is what we came up with. Fitted with a British designed Arm 7 microprocessor and GPS chip it is robust, waterproof and user friendly.

Used in conjunction with our live tracking server it would allow remote monitoring, for example, of those taking part in an exercise or an Outward Bound course.

Real time tracking
Interval tracking
GPS + GSM tracking
Geofence alert
Movement alert
Overspeed alert
Low power alert
Vibration alert
SOS alert
Supports TF card to store the data when there is no GPRS coverage
Tracks playback
FOTA(firmware over the air)
Listen in, sound monitoring