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Model Railroad Infrared Train Detection
If something can be activated with a button, it can be automated with a train detector!
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Train Detectors
- Coded pulsed infrared proximity sensors for detecting model trains on the track.
- Pulsing (modulation) allows the detector to ignore ambient lighting.
- Coded pulsing allows each detector to ignore the IR signals of other nearby detectors.
- May be used as a reflective detector (sensors in the roadbed) or as an interrupt detector (detector looks across the track).
- On-board LEDs to aid with installation.
- Relay contact triggers crossing signals, trackside signals, panel lights or action accessories.
- Automatically switch track power, see the how to automatically stop trains and the collision avoidance at track crossings pages.
- Sensors can be used with the room lights on or off, they do not require overhead light sources.
- No rail gaps required, no modifications to rolling stock.
- Infrared detectors also available with USB computer interface
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MRD1 - Single & Simple
- Single position detector, senses a train at one point on the track.
- Includes optical sensors with 2-ft. wire leads.
- SPST (form 1A) relay contact output, isolated from detector electronics.
- Output contact rated for 1/2 A (500 milliamps).
- To control higher currents, use with an auxiliary power relay
- Compact size: 2.0 x 1.5 x 0.65 in.
- Power required: 8 to 15 volts AC or DC, 20 milliamps.
Detector turns on as soon as a train is detected. The drop-out time, that is, how long the detector remains on after the train has passed the sensor, can be set to 1/2 second or 3 seconds by moving a jumper. Longer drop-out delays can be special ordered, [ contact us ].
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• Installation instructions [pdf]
• More installation tips and examples
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MRD6 HexDetex™, Six Channel Detector with crossing signal trigger.
- Senses model trains at six places on the track.
- Electronic 5-volt logic outputs.
- Intelligently switches crossing signals on & off (signals and flasher circuits sold separately).
- On-board LEDs for easy setup.
- For details see the installation instructions.
- Size: 2.5 x 2.35 in. (64 x 60 mm)
- Power required: 8 to 15 volts AC or DC, 40 milliamps.
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MRD6 HexDetex™ with four or six pre-wired infrared sensor sets
Select the number of IR sensors and their wire length.
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Two sensor sets with 2-ft (60cm) wire length.
Two sensor sets with 6-ft (180cm) wire length.
Four sensor sets for crossing signal control where only four sensors are needed.
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2x 2ft, 2x 6ft.
$53.50
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All six sensor sets with 2-ft (60cm) wire length.
Use when all detection zones are close together.
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6 x 2 ft.
$53.50
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Two sensor sets with 2-ft (60cm) wire length.
Four sensor sets with 6-ft (180cm) wire length.
Use when detection zones are widely separated, or for crossing signal control where six sensors per track are needed.
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2x 2ft, 4x 6ft.
$59.50
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MRD8 with eight pre-wired infrared sensor sets
Choose wire length... or use your own sensors
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All 8 sensor sets with 2-ft (60cm) wire length.
Use when all detection zones are close together.
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8 x 2 ft.
$89.95
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4 sensor sets with 2-ft (60cm) wire length.
4 sensor sets with 6-ft (180cm) wire length.
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4x 2ft, 4x 6ft.
$98.95
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All 8 sensor sets with 6-ft (180cm) wire length.
Use when detection zones are widely separated.
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8x 6ft.
$107.95
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'Barefoot' option -- circuit board only, no IR sensors included. For those who wish to use their own IR LEDs and IR photo receivers.
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without sensors
$67.50
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• Extra sensor sets for use with MRD1, MRD2, MRD6 or MRD8 detector circuits above
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Two sensor sets can be wired to one detector when used in across-the-track configuration. For details [ click here ]
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Order extra sensor sets. One set includes one IR LED and one IR phototransistor. Does not include a detector circuit.
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© copyright 2009-2013 Azatrax, Longmont, Colorado
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