Head-to-head · Best Tire Pressure Monitoring Systems

TST 507 (4 Cap Sensors) vs Tymate TM12

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

TST 507 (4 Cap Sensors) comes out ahead by a narrow margin (4.5 vs 4.4). The gap is mostly about RV owners who prioritize US-based support and a longer warranty over raw tire-count capacity — read the strengths below before deciding.

Higher ratedRanked #3 in Best Tire Pressure Monitoring Systems

TST 507 (4 Cap Sensors)

4.5

$300

The TST 507 is the RV TPMS with the best brand support. Replaceable CR2032 batteries (no full-sensor replacement when batteries die), USA-based customer service, and a 3-year warranty are the differentiators against the cheaper Tymate options and the spec-sheet-leading EEZTire 518C. Expansion path goes to towing trucks plus 4 towables — useful for users who tow trailers frequently. The flow-through variant is the upgrade for users with metal valve stems.

Strengths

— USA-based live customer support — best in this lineup
— 3-year warranty — longest among picks here
— User-replaceable CR2032 sensor batteries — no need to replace whole sensors

Watch-outs

— Pricier than the Tymate TM7 by nearly 4x for 4 sensors
— RV/trailer-focused — overkill for daily drivers
— Cap-sensor design loses some PSI accuracy vs flow-through variant

$300 · Check Price on Amazon Full review →

Tymate TM12

Ranked #4 in Best Tire Pressure Monitoring Systems

Tymate TM12

4.4

$130

The TM12 is the budget RV/medium-trailer pick. Up to 12 tires monitored with 6 sensors in the base kit, USB and solar charging, and a 100 ft range with the included repeater — all at $130. The trade-off is the 12-tire ceiling and 116 PSI pressure range, which exclude heavy-duty commercial truck use. For typical Class C RVs, dual-axle travel trailers, and SUV+small-trailer setups, it's the value RV pick.

Strengths

— Monitors up to 12 tires — covers most consumer RVs and tow setups
— USB AND solar charging on the display unit
— 6 sensors included in the base kit; expandable

Watch-outs

— 12-tire ceiling is below the EEZTire 518C's 26-tire capacity
— Pressure range tops out at 116 PSI — not enough for heavy commercial-truck tires
— Less brand recognition than EEZTire or TST in RV circles

$130 · Check Price on Amazon Full review →

How they stack up

TST 507 (4 Cap Sensors)

Best support and warranty among picks here. Loses on tire count to the EEZTire 518C (4 vs 26) but matches on RV-tier robustness. More expensive than the Tymate TM7 and Tymate M7-3 by 3-4x but offers professional-tier brand support. Same Tymate TM12-class tire-count capacity at a similar price.

Tymate TM12

Budget RV pick. Cheaper than the EEZTire 518C and TST 507 but with lower tire-count and PSI ceilings. Same brand as the Tymate TM7 (consumer car) and Tymate M7-3 (RV-with-solar) but with higher sensor count.

Specs side-by-side

Spec	TST 507 (4 Cap Sensors)	Tymate TM12
Tires Monitored	4 (expandable to truck + 4 towables)	Up to 12 (6 sensors included)
Sensor Type	Cap (flow-through variant available)	External cap (IP67)
Battery	User-replaceable CR2032	—
Warranty	3-year	—
Support	USA-based live	—
Pressure Range	0-218 PSI	0-116 PSI
Accuracy	±3 PSI	±3 PSI
Display	Color LCD (4.6 in)	Color LCD
Charging	—	USB + Solar
Alarm Modes	—	6
Signal Range	—	50 ft (100 ft with repeater)

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