I was looking for a cheap Tyre pressure monitoring system for a little while, this one seems to be a really good price.
BEST OF ALL SHIPS FROM WITHIN AUSTRALIA.
A good YouTube video explaining TPMS by Aussie Youtubers https://www.youtube.com/watch?v=TNlwbYfDyVI , https://www.youtube.com/watch?v=egdn9AoFv2c
Recently also bought the non solar version for like $4 more (which uses AAA batteries from different seller) than that wish i had waited before buying that one, but it's okay. This one is way better as well, because it is solar you would not need to charge it. it should charge automatically with Sun.
its a really useful thing to have in my opinion for those people who are always lazy to check their tyre pressures, and have a car with no TPMS built in the car itself. In Australia, companies are not required to have TPMS in car, but other parts of world they must have some sort of tyre pressure monitoring system.
These are easy to install, and setup too. There are so many benifits of these tyre pressure monitors, for my case can give it to my fam, who always is lazy to check tyre pressures, and refill them. You can better monitor you tyre's life, and hopefully extend tyre life. And prevent tyre blow ups (by overpressurising e.g. you always fill tyres at 38 (thinking that's hot tyre) but one time you put 38 on cold tyre, and tyre rated at 42 max, with heat it may expand to 45 and blow up)
Regarding Downsides,
I have heard some TMPS are not that accurate pressure wise, if that's the case ofcourse buying of eBay, eBay can help otherwise generally speaking just calibrate in your brain, like how people calibrate broken car speedometers, e.g. 50 Km on Speedo is actually 55 Km in real life etc.
Other downside is these are going to be a pain in the a** to take of, (you need the wrench to take them off) it's like a theft safety mechanism. So tyre pressure filling up can take a while.
Another downside is it beeping when there's nothing wrong (false alarm) like sudden ambient temperature change from extremely hot sun, to rain causing tyre pressures to fall suddenly, which it may think of as a air leak (sudden pressure loss).
You will need to buy 1632 batteries from outside, but they are real cheap on eBay.
Features:
Tire Pressure Monitoring System(TPMS),which lets the driver get the real-time tire pressure data,temperature data and status,always keeping an eye on your car's performance.
Support shows four wheels' tire pressure and temperature simultaneously,high/low tire pressure alarm,high temperature alarm and air leakage condition alarm.
Real-time notification of the tire pressure condition of each tire, the driver can guarantee the pressure balance of the four tires according to the tire pressure value, so as to achieve smoother running.
After fix the sensor on the four tires, the receiver can be sitting on any surface of the car. When the vehicle is started, the built-in displacement sensor of the host computer automatically starts the host without manual startup.
When a tire tire pressure is too high or too low when the host issued an alarm sound and display the tire pressure value, and locate the tire tire pressure is not normal to quickly find the problem of tires.
When a tire temperature is too high, the host alarm sounds and displays the real-time tire temperature value, and locates the tire with too high temperature so that the driver can make corresponding treatment.
Combining with the solar energy display,There is no need to connect the power cord and it saves precious on-board power supply ports.
Specification:
Display screen:LCD
Operating temperature: -20℃ ~ 70℃
Working voltage: 5V
Daytime operating current/Night operating current/Standby current:<15mA/<4mA/<50uA
Transmission frequency:433.92MHZ+/-20KHZ
Transmission mode:FSK
Pressure unit: BAR/PSI
Charging ways:Solar energy/USB
Battery:1303450 3.7V 500mAh
Monitor size: Approx.9.58.5cm/
Package weight:207g/7.3oz
Package size:15.513.55.8cm/6.15.32.3in
Sensor:
Operating temperature:- 40℃ ~ 125℃
Working voltage: 2.0-3.6V
Standby current:<1uA
Transmission frequency: 433.92MHZ+/-20KHZ
Transmitted power:>8dBm
Open Distance:>30M
Battery(each sensor):1CR1632 3V
Sensor size(each): Approx.22*2cm/
Packing list:K14171
1 x Tire pressure tester
4 x Sensors
4 x Anti-lost nuts
1 x Portable tool
1 x Charging cable
1 x User Manuall(English)
I've been using this for a few years.
I think two of the sensors have died due to the battery depleting. The main console's battery has degraded so it doesn't last very long with a full charge from the solar panel. Sometimes it throws a random pressure value which freaks me out and I check the tyre and ends up being a false alarm.
The anti-lost nuts will give you a massive headache because it's hard to unscrew it without getting grease on your hands and it takes 3 times longer to inflate the tyres because you gotta remove these nuts first. I stopped using the nuts altogether.
Another gripe is that the labels on the sensors will eventually fall off because it's just a paper sticker. Best to put a labelmaker label on it and put some araldite or super glue over it to keep it attached.
The sensor is also not user-friendly to screw on. Sometimes at night I struggle to screw it on the tyre and end up releasing a lot of air.