US Automatic Sentry 300
#8 in Single swingFull review
A commercial grade, UL 325 listed single gate opener with a long warranty for buyers who value proven parts support over capacity per dollar.
Amazon $1,395$1,395
The US Automatic Sentry 300 rates 3.2 among single swing automatic gate openers; the TOPENS PW302 rates 2.4 among dual swing ones. The TOPENS PW302 costs $996 less ($399 vs $1,395).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
TOPENS PW302
#11 in Dual swingFull review
A budget dual kit for a light pair of gates near an outlet. Heavier or longer leaves need a bigger kit.
Amazon $399$399
Scores side by side
These two sit in different gate type classes (single swing and dual swing), and each is scored against the reference points for its own class, so a rating says how well each does among its own gate type peers. How we rank explains each factor.
| Factor weight | US Automatic Sentry 300 | TOPENS PW302 |
|---|---|---|
| Overall rating | 3.2/5 | 2.4/5 |
| Gate weight 20% | 24 gates up to 400 lb per leaf | 0 gates up to 300 lb per leaf |
| Gate length 15% | 100 gates up to 20 ft per leaf | 20 gates up to 12 ft per leaf |
| Safety listing 15% | 100 UL 325 listed | 0 no UL 325 listing published, scored as none |
| Price 25% | 0 $1,395 | 90 $399 |
| Warranty 25% | 50 3-year warranty | 0 1-year warranty |
Specifications
| US Automatic Sentry 300 | TOPENS PW302 | |
|---|---|---|
| Gate | ||
| Gate type | Single swing | Dual swing |
| Heaviest gate | 400 lb | 300 lb |
| Longest gate | 20 ft | 12 ft |
| Time to open | 16 s | 15 s |
| UL 325 listed | Yes | - |
| Power | ||
| Power | Battery, solar ready | AC |
| Motor voltage | 12 V | 24 V |
| Build | ||
| Remotes included | 2 | 2 |
| Weight | - | 34.6 lb |
| Warranty | 3 years | 1 year |