Since I don't have anything, and I kind of like; and use to just checking all my tires before each trip and a good walk around during gas stops, I figure I would go with the best buys I could find with the cheaper model presumed to be from China.
I bought three sets (2 of exact same models, and a 3rd model specifically for Trucks / RVs) I spent a total of about $75
Set 1 & Set 2 (For Navigator and 24' Tandem Axle Yamaha Trailler)
Solar TPMS Wireless Car Tire Pressure LCD Monitoring System+4 External Sensors
Temperature resolution：±2°C（25°C）
Pressure resolution：±0.1Bar
Transmitted power：≤10dBm
Lithium battery：CR1632（Model）
Operating voltage：2.1-3.6V
Working temperature：-30°C-85°C
Pressure range:0-5.0Bar
Waterproof grade：IP67
Emission frequency：433.92MHz
Battery life：24 months
Storage temperature：-30°C-90°C
Set 3 For Winnebago Sunstar 29VE
Solar Truck TPMS Tire Pressure Monitoring System with 6 External Sensors
Working voltage: 3.7-5V
Display mode: LCD color screen
Working current: <13mA
Working temperature: -20~+80 ℃
Storage temperature: -20~+85 ℃
Shutdown current: <0.7mA
Power-on voltage: DC 5V
Receiving frequency: 433.92MHz±20.00MHz
Signal receiving sensitivity: -90dbm
Sensor
Battery life: 24 months
Storage temperature: -20~+85 ℃
Working voltage: 2.1V-3.3V
Working temperature: -20~+85 ℃
Pressure range: 0~15.0 Bar
Pressure accuracy: ±0.1 Bar
Temperature accuracy: +/-3℃
Transmitting power: <15dBm
Transmitting frequency: 433.92MHz±20.00MHz
Notes:
- I don't know what will happen if I try to have two of the exact same 4 sensor models in my SUV-Navigator, but I will find out for $20; If it does not, I will have a backup set for my SUV
- If sensors do work on the boat, I have zero plans to remove each time I launch; so if it fails when submerged in lake water, I will find out soon
- I don't plan to lock anything; so if a sensor or two are stolen, I will just have to buy another set assuming they actually work.
- Not sure if I will need a repeater for boat or RV, but lesson coming
- If the unit in the RV will last at least 1 year, I could buy a new one every year for 10 years straight for what the TST507 would costs which would be my preferred TPMS of choice if money were no option
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