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Used the original TST 507 with monochrome screen for 9 years.. jist upgraded the screen to the new color one and replaced the sensors .. still working but wanted new ones
The color screen with sun shield is way way way better to read.. it also has a rechargeable lithium battery and will operate for many days between charges..
This gives you a wire free mount and is recharged via standard USB cord
The new sensor ( not flow thru ) are very close to the 3 tire gauges I use.. within 1 PSI on all six sensors..I run two on my truck rear tires since truck doesn’t have built in TPMS
TST customer service is outstanding .. if ever needed
Initial setup and programming took 5 minutes for all six sensor and setting the low and high pressure limits I wanted to run with
I also recommend getting the remote transmitter and wiring inside your RV.. the older TST system I used I didn’t get that and the new one I did and have zero sensor dropouts
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