Linear Pro Access R4500 Wireless Exit Wand Vehicle Sensor
The R4500 wireless exit wand is used when a gate needs hands-free vehicle exit activation without running the full sensor cable back to the operator cabinet. The system uses a direct-burial sensing coil, a plug-in electronics/transmitter module, and a receiver that connects to the gate operator control board. When a moving vehicle passes through the sensing area, the receiver sends a dry-contact-style open command to the operator. This makes the R4500 useful on long driveways, finished pavement areas, or sites where trenching a wired wand is not practical. Correct placement is important: the wand should be on the inside/exit side of the property, located far enough from the moving gate so it does not trigger at the wrong time, and positioned to detect vehicles without creating nuisance opens from nearby metal movement. It is not a loop detector and it is not a UL safety sensor.
Compatible With
- Linear Pro Access / GTO R4500 wireless vehicle exit sensor systems
- GTO Wireless Exit Sensor applications
- Vehicular gate operators that can accept the included receiver output as an open/free-exit command
- Linear / GTO swing and slide gate openers when receiver and control input are compatible
- Mighty Mule and related GTO access systems when receiver wiring and frequency/coding are supported
- Residential, agricultural, and light commercial exit-only gate activation applications
- Sites where a wired FM139/FM140/FM141 exit wand is not practical due to trenching distance
Features and Specifications
| Manufacturer | Linear / GTO |
|---|
| Product Type | Wireless vehicle exit wand / exit sensor |
|---|
| Part Number | R4500 |
|---|
| Application | Hands-free vehicle exit activation |
|---|
| Detection Type | Electromagnetic sensing of moving iron-based metal |
|---|
| Wireless Range | Commonly referenced around 80 to 100 ft transmitter-to-receiver range under suitable conditions |
|---|
| Power | Transmitter module commonly uses AA batteries |
|---|
| Included Components | Wireless sensor wand, transmitter module, receiver, and cable components depending on kit |
|---|
| Safety Monitoring | Not a safety reversing device |
|---|
| Notes | Use only as an exit activation device |
|---|
Also Known As / Related Part Numbers
- R4500
- GTO R4500
- Linear R4500
- GTO Wireless Exit Sensor
- Wireless vehicle sensor exit wand
- Mighty Mule FM130 related wireless exit sensor reference
- Related wired exit wand models: FM139, FM140, FM141
- Related receiver reference: RB709U-NB in some kits
Technician Note
Install the R4500 as an open/free-exit device only. Do not use it to replace photo eyes, safety edges, or any monitored entrapment protection device required for the gate operator.
Before Ordering
- Confirm the operator can accept the receiver output as an open or free-exit input.
- Check available mounting distance between transmitter and receiver.
- Plan the wand location away from the gate travel path and nearby moving metal.
- Confirm whether a wired wand would be more reliable for the site.
- Keep required safety devices installed and working.
Important Ordering Warnings
- Do not install this as a pedestrian detection device or safety reversing sensor. Vehicle sensors can be triggered by certain moving metal objects and must be located carefully.
Professional Advisory
A qualified gate technician should be used if the gate lacks proper entrapment protection, if receiver wiring is unclear, or if the operator opens/closes unexpectedly during testing.
Product Questions and Answers
Is the R4500 a safety device?
No. The R4500 is an exit activation sensor only. It should not be used as a reversing sensor or replacement for monitored entrapment protection.
How does the R4500 differ from FM139 or FM140?
The R4500 uses a wireless transmitter and receiver arrangement. FM139 and FM140 are wired exit wands with different cable lengths.
Can the R4500 work with any gate opener?
It may be used with many gate operators that accept a compatible receiver output, but final compatibility depends on receiver wiring, control input type, and site layout.
What can cause nuisance openings?
Improper placement, nearby moving metal, a sensor too close to the gate, weak batteries, or radio range issues can cause unreliable operation.
Where is the R4500 usually installed?
It is installed on the inside exit side of the driveway so vehicles leaving the property can trigger the gate to open automatically.
