Circuitron 5204 DT-4 Rolling Stock Detector

Circuitron 5204 DT-4 Rolling Stock Detector

Skip to product information
1 of 3
Regular price $31.99
Sale price
Regular price
Reg Price: $58.95
In stock : Ships within 1 Business Day!
This is a Circuitron 5204 HO DT-4 Rolling Stock Detector. DT-4 Rolling Stock Detection Unit. Trackside Accessories. HO Scale. Provides the modeler with an ideal system for spotting a train or even a single piece of rolling stock in a hidden location. Contains four completely independent detection circuits combined onto one circuit board, can be used separately or together to control external devices. Each detection circuit uses Optic sensors for triggering each circuit. Supplied with four Opto-Sensors that mount between rails to detect movement. When train covers a sensor, the unit activates any connected DC accessory, such as an indicator light on a control panel. Independent sensitivity controls are provided for adjusting each Opto-Sensor to lighting conditions. It is constructed on a 3 x 3 printed circuit board and requires 10-18V DC input. Compatible with radio or carrier control systems. Contains four completely independent detection circuits combined onto one circuit board. Each of the separate sections may be used alone or in conjunction with each other at various points on a layout. Utilizes proven Opto-Electronic principles and provides a signal at one of the output terminals whenever the corresponding Opto-Sensor is shaded from the ambient room light by a piece of rolling stock. Independent sensitivity controls are provided to adjust each of the 4 circuits to varying lighting conditions. The DT-4 can be used for any scale and will detect all powered and unpowered rolling stock with no modifications necessary. Each output on the DT-4 provides a connection to ‘negative’ (ground) when the Opto-Sensor is covered and the output is ON. Like all Circuitron Detection circuits, these outputs will each control up to 250 mA of DC accessories or lamps.

Condition: Excellent (C-7)
Operational Status: Functional
Original Box: No

Manufacturer: Circuitron
Model Number: 5204

Category 1: Parts
Category 2: Control & Electrical

We are unable to provide parts lookup service or fitment assistance.

The Trainz SKU for this item is P11544224.

Trainz Product Id: 11544224

Your order is professionally packed with high quality packing materials to offer the best possible protection during transit.  If something should go wrong, we insure all packages against both loss and damage. 

We’re committed to keeping our shipping prices low, and our delivery times fast. Our system will automatically choose the best carrier at the time of shipment to help us deliver the lowest prices possible.

The moment your order ships you will receive an automated email which provides confirmation of shipment.  For most shipping services you will also receive a tracking number and a link to a page where you can track your shipment.

Sign In or choose a shipping location to see rates.
Your default address has been changed to:
Free shipping

We love happy customers and do our best to maintain a fair and hassle-free customer satisfaction policy. We will gladly repair or replace your item, issue a refund, or negotiate a partial credit.

Just contact us within 30 days of receipt of the item (or within 60 days if you are a Private Car member). Explain why the item does not meet your expectations and how you would like us to handle the issue. If your item has been damaged try to include a photograph of the actual damages. We’ll do our absolute best to make you happy.

If you and Trainz decide that the best recourse is to return the item for refund or repair we will send you a pre-paid return shipping label at no cost. Make sure to include your contact and order information when you return your items. Once Trainz receives and inspects the items we will repair your item or issue a refund.

Trainz reserves the right to charge you:

  • Return shipping if the return is not the fault of Trainz.
  • 15% re-stocking fee if an item is not returned in its original condition.
  • Any carrier charges resulting from a refused shipment.

Our return policy may differ on our other marketplaces such as eBay. If your item was not purchased on, please review the return policy where your item was purchased.

If you have any questions, don't hesitate to Submit a Support Ticket

View full details