Reno A&E AX-3 120V Single Channel Loop Detector
The Reno A&E AX-3 is the 120 VAC version of the AX Series single-channel vehicle detector. It is used when a gate operator, barrier gate, parking controller, or access-control panel needs a dependable signal from one inductive ground loop. In the field, this type of detector is commonly installed for exit loops, safety loops, hold-open loops, presence detection, and vehicle sensing at controlled entries. The AX Series is a practical service replacement when the system is wired for a single-channel, single-output 11-pin detector and the control cabinet supplies 120 VAC. Correct voltage matters: an AX-3 should not be swapped with AX-4 low-voltage or AX-8 240 VAC versions unless the cabinet power source and wiring are changed to match. Loop condition, lead-in wiring, and socket condition should also be checked because a failed loop circuit can look like a bad detector.
Compatible With
- Select gate operators, barrier gates, parking access lanes, and traffic-control panels that use a 120 VAC single-channel inductive loop detector.
- 11-pin plug-in loop detector installations using a compatible harness or socket base.
- Common loop functions such as exit, safety, reversing, hold-open, and vehicle-presence inputs when the controller wiring supports the relay output.
- AX Series 120 VAC applications where the original detector label or parts diagram calls for AX-3, AX3, or Model AX-3.
- Retrofit locations using Reno A&E 802-4 style 11-pin harnesses or SKT-11 style socket bases, when the pinout and voltage are confirmed.
Features and Specifications
| Manufacturer | Reno A&E |
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| Product Type | Single channel vehicle loop detector |
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| Part Number | AX-3 / AX3 |
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| Application | Vehicle detection for gate, barrier, parking, and access-control systems |
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| Input Voltage | 120 VAC nominal, commonly listed as 89 to 135 VAC |
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| Outputs | Single relay output |
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| Connector Style | 11-pin plug-in / Amphenol style detector connection |
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| Sensitivity / Setup | External and internal DIP switch settings depending on configuration |
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| Related Voltage Models | AX-4 low-voltage and AX-8 240 VAC are related AX Series models, not automatic substitutes |
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| Notes | Match source voltage, relay wiring, and detector pinout before replacement |
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Also Known As / Related Part Numbers
Technician Note
When an AX-3 will not detect, check loop continuity, loop-to-ground leakage, lead-in splices, and socket wiring before assuming the detector has failed. A broken loop, water-filled saw cut, or loose harness pin can cause false faults.
Before Ordering Checklist
- Confirm the old detector is marked AX-3, AX3, or 120 VAC AX Series.
- Verify the cabinet supplies 120 VAC to the detector socket.
- Confirm the installation uses an 11-pin detector connection.
- Check whether the control panel needs presence, pulse, fail-safe, or fail-secure behavior.
- Inspect the loop and lead-in wiring for damage before replacing the detector.
Important Ordering Warnings
- Do not replace a low-voltage AX-4 or BX-4 with an AX-3 unless the detector supply voltage is 120 VAC.
- Do not use voltage variants interchangeably just because the detector housings look similar.
Professional Advisory
Vehicle loop detectors and related wiring parts should be installed with the operator power off and tested with the gate, barrier, or door system in a controlled position. Do not bypass required safety devices. If the installation involves high voltage, damaged conduit, wet junction boxes, or uncertain relay wiring, use a qualified gate or access-control technician.
Product Questions and Answers
Is the AX-3 the 120V version of the Reno AX detector?
Yes. The AX-3 is the 120 VAC version of the Reno A&E AX Series single-channel loop detector.
Can this detector be used for an exit loop?
It may be used for exit-loop applications when the gate or access controller accepts the AX-3 relay output and the loop wiring is installed correctly.
Does the AX-3 replace an AX-4?
Not automatically. AX-4 is the low-voltage AX model, while AX-3 is the 120 VAC model. Match the original voltage and parts diagram.
What socket or harness is commonly used with this detector?
AX Series 11-pin installations commonly use an 802-4 style harness or an SKT-11 style socket base when the pinout matches the control cabinet.
What should be checked before replacing the detector?
Check detector voltage, socket style, relay wiring, loop continuity, and loop insulation condition before ordering or installing the replacement.
