Diablo Controls DSP-19 Low Power Loop and Mini-Loop Vehicle Detector
The Diablo Controls DSP-19 is a low-current vehicle detector intended for applications where a standard loop detector may draw too much power or take up too much space. It can be used with a conventional inductive loop or with a Diablo mini-loop sensor, depending on the installation. This makes it useful in gate operator cabinets, solar or battery-assisted access systems, compact parking equipment, and low-voltage vehicle detection circuits. The DSP-19 is not a conventional relay-output detector; it uses a solid-state open-drain style output, so the receiving controller must be able to accept that type of signal or be wired through the correct interface. Because of the low-power design, it is commonly considered where a gate must conserve standby current but still needs a vehicle detect, free-exit, or presence style input. Correct selection depends on the original detector, power supply, connector, loop/sensor type, and output wiring.
Compatible With
- Standard in-ground inductive loops when the loop range and wiring match the detector requirements.
- Diablo Controls mini-loop sensors where the DSP-19 is specified.
- Solar, battery-backed, and low-current access-control systems needing low-power vehicle detection.
- Gate operators, access-control panels, parking controllers, and compact control boxes with compatible low-voltage DC power and solid-state input wiring.
- Free-exit, vehicle detect, and presence applications where a single solid-state open-drain output is accepted.
- Related to DSP-55 mini-loop systems, but with different power and output characteristics.
- Not a direct plug-in replacement for relay-output, 11-pin, 10-pin Molex, or high-voltage detector models unless the wiring has been designed for the DSP-19.
Features & Specifications
| Manufacturer | Diablo Controls |
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| Product Type | Low-Power Vehicle Detector |
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| Part Number | DSP-19 |
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| Application | Loop and mini-loop vehicle detection |
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| Power | Low-voltage DC operation; commonly referenced as 8-35 VDC |
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| Current Draw | Very low standby current; commonly referenced below 1 mA in non-detect state |
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| Loop Compatibility | Standard inductive loop or Diablo mini-loop where specified |
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| Output | Single solid-state open-drain output |
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| Common Use | Solar gates, access control, free exit, compact detection circuits |
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| Notes | Controller input must match the solid-state output style |
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Also Known As / Related Part Numbers
- DSP-19
- DSP19
- DSP 19
- Diablo DSP-19 detector
- Diablo low-power mini-loop detector
- DSP-55 - related mini-loop detector, not the same output package
- DSP-55-75ft - related mini-loop kit
- Diablo mini-loop sensor - related sensor component
Technician Note
A low-power detector can save battery current, but only if the rest of the circuit is wired correctly. Confirm the controller input can use an open-drain output before replacing a relay-output detector with the DSP-19.
Before Ordering Checklist
- Confirm the system power supply is low-voltage DC and within the detector range.
- Verify whether the sensor is a standard loop or Diablo mini-loop.
- Confirm the controller accepts a solid-state open-drain output.
- Check the loop or mini-loop cable for damage before replacing the detector.
- Confirm whether the application is free-exit, presence, or another vehicle-detect input.
Professional Advisory
Low-voltage wiring changes can still cause gate malfunction if connected to the wrong input. For solar or battery gate systems, have a qualified gate technician verify current draw and input behavior after installation.
Important Ordering Warnings
- Do not replace a relay-output detector with a DSP-19 unless the controller input supports the output type.
- Do not use a vehicle detector as a substitute for required monitored safety devices.
- Mini-loop sensors should be installed in the correct location for vehicle movement and lane geometry.
Product Q&A
Why choose the DSP-19?
Choose it for low-power vehicle detection where a standard detector uses too much standby current or where a compact solid-state output is required.
Can the DSP-19 work with a mini-loop?
Yes, it is commonly associated with Diablo mini-loop applications where the installation calls for the DSP-19.
Does the DSP-19 have a relay output?
No. It is commonly referenced with a solid-state open-drain output, so the controller input must be compatible.
Is this good for solar gate systems?
It may be used in solar or battery-powered systems when the voltage, output wiring, and sensor setup match the gate controller.
Can it be used for safety protection?
It is a vehicle detection device. Required monitored safety protection should be handled with approved photo eyes, safety edges, or other devices listed for the operator.
