HTZSAFE Solar Beam 190 ft
A budget solar break-beam for an entrance up to 190 ft wide, close enough to the house for a quarter-mile radio.
Amazon $89.99$89.99
The HTZSAFE Solar Beam 190 ft rates 3.1 among motion and beam sensors driveway alarms; the Mighty Mule FM231 rates 2.4 among vehicle-only sensors ones. The Mighty Mule FM231 costs $22.01 less ($67.98 vs $89.99).
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.
Mighty Mule FM231
A low-cost buried vehicle sensor for a short driveway where the house sits within a few hundred feet of the sensor.
Amazon $67.98$67.98
Scores side by side
These two sit in different sensor type classes (motion and beam sensors and vehicle-only sensors), and each is scored against the reference points for its own class, so a rating says how well each does among its own sensor type peers. How we rank explains each factor.
| Factor weight | HTZSAFE Solar Beam 190 ft | Mighty Mule FM231 |
|---|---|---|
| Overall rating | 3.1/5 | 2.4/5 |
| Wireless range 30% | 46 1,320 ft claimed wireless range | 0 400 ft claimed wireless range |
| Value 25% | 48 $89.99 per sensor ($89.99, 1 sensor) | 60 $67.98 per sensor ($67.98, 1 sensor) |
| Features 25% | 40 solar-charged sensor, battery-powered receiver, per-sensor alerts | 10 adjustable sensitivity |
| Expandability 10% | 100 up to 32 sensors per receiver | 50 sensor limit not published (neutral score used) |
| Warranty 10% | 0 warranty not published, scored as none | 33 1-year warranty |
Specifications
| HTZSAFE Solar Beam 190 ft | Mighty Mule FM231 | |
|---|---|---|
| Detection | ||
| Sensor type | Infrared break beam | Magnetic probe |
| Detection distance | 190 ft beam spacing | 12 ft |
| Adjustable sensitivity | - | Yes |
| System | ||
| Wireless range | 1,320 ft (claimed) | 400 ft (claimed) |
| Sensors in box | 1 | 1 |
| Receivers in box | 1 | 1 |
| Sensors per receiver | Up to 32 | - |
| Price per sensor | $89.99 | $67.98 |
| Alerts | ||
| Phone alerts (Wi-Fi) | No | No |
| Receiver power | Plug-in with battery backup | Plug-in |
| Relay or 12 V output | No | No |
| Per-sensor alerts | Yes | No |
| Power and build | ||
| Sensor power | Solar, rechargeable | AA batteries |
| Sensor battery life | Solar-charged lithium-ion batteries | Two AA batteries (not included), with a low-battery light |
| Warranty | - | 1 year |