Tyre Pressure Monitorig System (Tpms)

[TKH]

My reading of the eBay item is that the sensor is in the valve cap. That - to me - implies the cap holds the valve open so the pressured can get to the cap. So the valve is negated and the only thing retaining the pressure is the seal on the cap.

Hmmmmm.

OK, if the cap falls off the valve will do its job but the cap seal itself could form the source of a leak.

 

Another query - if the cap has the sensor how does it monitor the air temperature in the tyre?

Hmmmmm again!

 

A better design with the sensor built into the base of the valve unit - or so it seems to me - is this one:- https://www.ebay.co.uk/itm/Motorcycle-TP...0010.m2109

 

That seems OK but needs the tyre displaced to insert it, and it doesn't have a right-angle valve stem like I find so useful. Also there is a battery on the internal sensor and the claimed life is two years so that replacement would need to be taken into account. Maybe coordinate with tyre change?

Maybe such a combo. (internal, right angled) exists, but I'm not in the market so someone else can go search if they want.

 

Cheers I'll look at that one.

 

In terms of temp I would only guess at it being the valve temp?

 

Fitting one in with an internal sensor isn't too big a job as I do my own tyre changes. Either one I think would affect balance of the wheel so it would be wheel off for whichever. Would be more secure theft wise with the internal sensor. 

 

Agree about the right angle valve, although there are right angled extensions that can be added to pump up the tyre. They can be a pita sometimes though.

 

I wonder what happens when the sensor battery dies? New sensor? How does new sensor get linked to the existing system. mmmm indeed.

This post was last modified: 18-03-2019, 12:29 PM by TKH.