Reflective Infrared Proximity Sensor with Remote Sensor
"I was having problems with the sensors for my
grade crossing flashers... As soon as I replaced the sensors with the
ISE sensors, all the problems went away and the crossing signals have
worked flawlessly." – Jason Klocke. View Jason’s spectacular CGW layout here.
This device is a simple infrared sensor
that makes detection of locomotives or rolling stock easy
and reliable. Just place the sensor where its invisible light beam will reflect off
the object of interest and you're done - no time-consuming or
frustrating adjustments! Based on modern silicon technology, this sensor is
tolerant of ambient (background) lighting conditions, be it completely dark or under full lights, with no false
triggering. Combined with a
discrete under-track installation, this low-profile sensor solves many of the
challenges that plague other optical detector products.
- Small size (0.25" x 2.25")
- No adjustment needed!
- Simple, discrete under-track installation
- Variable release time up to 23 seconds (or 23 minutes with Long Delay option)
- Two opposite polarity, open-collector outputs (40V / 250mA capable)
- Tolerant of ambient (background) lighting conditions (no false triggering)
- Terminal blocks for connecting power and outputs
- Qwiic Connect compatible sensor with 18" cable
- Powered from 5V to 24V
- Activate grade crossing signals
- Trigger sound events
- Simulate a spring switch using an MRServo switch machine
- Build an automatic interchange
- Occupancy detection for signal systems or hidden tracks
- End-of-track indication in hidden staging yards
- C/MRI track occupancy inputs
The detector is designed to be installed up through the benchwork in a 3/8 inch (10 mm) hole. Because the sensor itself is so small, only a single hole is required and no complicated drilling jigs are needed. The sensor can be secured in the hole using a variety of methods such as hot glue or by using a bracket. An example mounting bracket can be found here.
The CKT-IRSENSE-2PC needs 5-24 volts of clean direct current (DC) power to operate. Two opposite polarity outputs are provided, both of which are “open drain” (otherwise known as “open collector”) and act like a switch to the ground or negative lead.
Logic level outputs can be generated by connecting a resistor to pull up the output to the positive supply. Other devices, such as LEDs or relays can also be driven directly and the outputs from multiple sensors can be connected in parallel to combine them into one signal.
By default, the release time is programmable from 0.1s to 23s using
an external resistor or the onboard potentiometer. A long-delay option is also available with
release times from 6s to 23 minutes - contact us for details.
The activation time is preset to 0.1s.
The sensing distance varies with the reflectivity of the object being sensed, but is typically 1.5".
The complete gEDA design files are available on GitHub.
- 0 in stock - contact us for lead time.
News & Application Notes
2018 Optical Detector Roundup
Many of you already know that Iowa Scaled makes both kinds of detectors – an optical detector known as the CKT-IRSENSE, and a current detector known as the CKT-BD1. When discussing detectors a few months back, Michael and I thought it would be interesting to compare ours with the various other products on the market and figure out who really has the best stuff. In this installment, we’ll look at six of the most popular optical sensors on the market, comparing and testing them, and try to give you a fair and honest comparison between all your options. We’re a weird company, and just to prove it again we’re going to say some nice things about other peoples’ products, and some bad things about ours. Read on…