Statistically speaking, vehicles are more likely than not to be running on under-inflated tyres.
Rolling resistance caused by under-inflated tyres is costing Europeans £2.4 billion, two billion tons of wasted fuel and 4.8 million tons of additional and unnecessary CO2 emissions every year. Under-inflated tyres are also dangerous due to excessive shear stress in the tire shoulder and heat build-up from sidewall bending. Low tyre pressure affects handling, stability, breaking effectiveness and leads to tyre failure resulting in accidents, injuries and death.
Bridgestone estimates that 12.2 million tires in Europe are removed from circulation each year because of premature wear. Correctly inflated tyres will extend the life of the tread, reduce fuel consumption and improve safety.
|Amount of Under-inflation||Wasted Fuel||Added Tyre Wear|
Tyres can account for over a third of a vehicle’s maintenance cost. Regularly checking tyre pressure is an essential maintenance procedure and is also one of the most difficult to enforce. Drivers and maintenance personnel will often assume that if a few are ok then the rest will be as well and in some cases they will skip this procedure entirely.
Vehicles with dual tyres are particularly neglected as an inside tyre could be completely flat but would be hidden and supported by the outside tyre allowing it to appear properly inflated whilst the other tyre does all the work until it overheats and ruptures.
Basic Tyre Pressure Monitoring Systems (TPMS) are able to alert the driver to an unexpected change in tyre pressure. More sophisticated systems provide the driver with a display that will identify which tyre in particular needs attention. Drivers should react immediately but some will often wait, putting themselves and their vehicle at risk. FleetSure addresses this problem by utilising wireless sensors which are either screwed directly onto each valve-stem or fitted internally. All tyres including spares can be constantly monitored whether moving or parked. Individual pressure levels, temperatures and warnings can be displayed in the cab as well as being transmitted to relevant fleet management personnel. Different levels of urgency can be conveyed to the driver and the fleet operator will know if a warning is ignored.
Fleet-wide reports can be generated at set times or on-demand and depot maps showing the location of each vehicle can be provided so that tyres requiring attention can be identified before drivers even arrive at their vehicles or trailers.
Wireless TPMS Sensor Specifications
|Pressure measurement range||0 to 199 PSI (0 to 13.7 Bar)|
|Pressure accuracy||±1 PSI (<= 60 PSI) ± 2.0% (>60 PSI)|
|Temperature measurement range||-40 °C to +121 °C (-40 °F to +250 °F)|
|Temperature accuracy||2.3 °C (4 °F)|
|Battery sensor life (normal daily usage)||6 years (Double-Battery) 3 years (Single-Battery|
|Slow leak alert trigger||Tire pressure drops >3 PSI within 2 to 10 minutes|
|Measurement interval||Continuously checks pressure when vehicle is active and checks every 1 minute when stationary.|
|Update interval||Transmits every 5 minutes on an active vehicle & every hour when stationary. Alerts to abnormal tyre conditions immediately.|
|Monitoring time||Monitors & alerts (while parked or moving) 24 hours per day.|
Tyres running properly inflated would eliminate more than 4.8 Million Tonnes of Carbon Monoxide pollutants per year.
External Cap Sensors
External sensors are easy to install and maintain however external cap sensors must be removed for air refills and then reinstalled.
External Flow-Through Sensors
In contrast to the standard external cap sensors, the patented flow-through sensor supports refilling air through the built-in valve stem of the sensor. Powered by two large batteries, the flow-through sensor can stay on the valve stem for up to 6-years without needing to be replaced.
All external sensors have locking set screws for theft and loss prevention.
Internal Rim-Mounted Sensors
The internal rim-mounted sensor mounts on the wheel with a stainless-steel strap, and monitors both pressure and temperature inside the tyre. Mounting band fits on 14” to 22 1⁄2 inch wheels.
Internal Valve Sensors
The internal valve sensor replaces the standard valve and, just like the rim-mounted sensors, monitors both pressure and temperature inside the tyre.
Internal sensors measure temperature more accurately than the external sensors but require the tyre to be dismounted from the wheel for installation.
Dual-Tyre Pressure Monitor and Equaliser
The new patent pending dual-tyre sensor is the only device available that is able to monitor the dual tyre pressure and temperature whilst, at the same time, equalising pressure between the two tyres.
During normal tyre conditions, the equaliser part of the device will keep the air communication between the two tyres open and thereby achieving dual tyre pressure balance. When the pressure in a tyre drops below a preset level (caused by air leaking, blowout, etc), then the equaliser will cut off air flow between the two tyres thus protecting the good tyre. The device has two individual sensors monitoring the pressure and temperature of the respective tyre.
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