Light sensors are used in a large number of industries to detect motion or changes in light. If you're considering a job in electronics manufacturing, design, robotics, environmental science or many other industries, you may need to know how to install and monitor light sensors. How much you'll need to know varies depending on the job you're considering and what type of light sensor you'll be working with.

Some industries, like electronics design, may require you to know more than just how to operate light sensors. They also may need you to understand how a light sensor works, along with the knowledge of computers and circuitry needed to install and design a light sensor. If you're interested in light sensors education and training, consider the following:

1. Learn about light sensors online from sensor manufacturers or industry websites.
2. Take classes in electrical engineering or sensor design to learn more about how light sensors work.
3. Attend industry events like conferences, trade shows and workshops to expand your knowledge of light sensors.
   

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Get educated about light sensors online

You can find basic information on light sensor systems and how they're used in various industries online. Information on specific types of light sensors, like traffic light sensors or indoor light sensors, is also available. These resources often are provided by light sensor manufacturers or industry associations in article, video or diagram form.

I recommend: Check out the Sensors Reference Center provided by Machine Design, or learn more about sensors and their applications at Measuring Vegetation Health.

Enroll in an electrical engineering class for more information on light sensors

Learn more about using a motion sensor light by taking an electrical engineering class or enrolling in an engineering degree program. These classes generally go over the installation and operation of a wide variety of sensor types, including many types of light sensors. These can include working with a motion light sensor, photoelectric light sensor or calibration light sensors.

I recommend: Take the Smart Sensors Systems Design class offered by the International Frequency Sensor Association, or get a degree in electrical engineering from the University of California, San Diego Jacobs School of Engineering.

Continue your light sensor education by attending industry events

Industry events, like trade shows, conferences and workshops, are a great place to learn more about light sensors. Trade shows provide training in the newest types of light sensors and the advances in the industry. Conferences and workshops allow you to learn more directly from the manufacturer and give you the opportunity to brush up on your skills. These events also allow you to network with people in the sensor industry, sharing challenges, tips and tricks.

I recommend: Get training at the IEEE Sensors Conference or attend the International Conference on Sensor Technologies and Applications.

A photoelectric light sensor is a device that registers the presence of light in an environment to cause a trigger in a light sensing system. Light sensors are separated into two categories: indoor light sensors and outdoor light sensors. Indoor light sensors often use either the ambient light sensor or motion light sensor. Most outdoor light sensors use the motion light sensor.

When purchasing light sensor systems, keep in mind your intended use for the system and buy appropriately. An outdoor lighting security system sometimes comes with lights already connected to the sensors, whereas indoor systems more often require the integration of a light sensor component into the circuitry of the building. Keep the following in mind when purchasing light sensor systems:

1. Indoor light sensor manufacturers with the equipment you need for room light sensing systems

2. Vendors of outdoor light sensors for security and aesthetic purposes

3. Specialized light sensors with custom capabilities

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Purchase motion light sensors and indoor light sensors and save on electricity bills

Indoor light sensors can automatically turn off lights in a room after a set period of inactivity and quickly pay for themselves in saved energy costs. These light sensors come in two main styles: ambient light sensors detect room brightness and adjust interior lighting accordingly; motion light sensor activate when a door opens or a person walks into a room, and deactivate after a set amount of time.

I recommend: Texas Advanced Optoelectronic Solutions sells components for ambient light sensors, and eLights.com sells many versions of the indoor model of the motion sensor light.

Improve your business' security using outdoor light sensors and light sensor systems

Outdoor light sensors and light sensor systems are a simple way to increase building security - connect them to an alarm system or even a motion detector light for a cheap criminal deterrent. For more aesthetic purposes, install a light sensing system into a garden and keep the outside of your building looking beautiful even in the night. Also, traffic control systems such as traffic light sensors utilize higher-grade outdoor light sensor systems.

I recommend: The Home Security Store sells many outdoor light sensors and automatic outdoor light sensor systems for your security needs. Also, PLC Multipoint is a quality source for all types of industrial-grade light sensors, such as specialty traffic light sensors and other transportation products.

Choose light sensors with long-range or random surface reflection

Optical sensors come in several styles, each specializing in something different. For example, some have long-range light sensors while others are resistant to random surface reflection.

I recommend: Kanson Electronics has a list of different types and qualities of optical sensors and their electrical specifications. Download or order the Tri-Tronics catalog of products for information about all types of light sensors, then order light sensors straight from the catalog.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  If you've purchased a system and then find out that it doesn't seem to be working, check to be sure the calibration of the light sensors is accurate. An incorrect calibration means the sensor won't register the brightness of light around it accurately and thus will not function properly.

Light sensors are useful for detecting light or brightness in a manner similar to a human eye. These sensors allow the settings to be adjusted automatically in response to the changing ambient light conditions. A light sensor is an important component in various devices, such as industrial lighting systems, consumer electronics products and automotive systems.

While interacting with the suppliers of light sensors, you will come across various technical terms that indicate types, technologies and properties of sensor devices. Understanding these light sensors key terms will help you make smarter business choices. This guide covers some common terms that you will hear from the light sensors dealers, including photodiode, illuminance, photoelectric sensors and photocells.

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Photodiode

A photodiode is a semiconductor light sensor that detects the presence of light and converts it into either current or voltage, depending upon the mode of operation.

I recommend: You can get technical information about photodiodes at Hamamatsu Corporation, a manufacturer of light sensor devices.

Illuminance

Illuminance is the measure of intensity of light incident on a surface; it can be correlated to the brightness perceived by a human eye. Illuminance is measured in footcandles or lux -- one lux is one lumen per square meter.

I recommend: Lighting Design Lab, an informative source on lighting products, offers a glossary of technical terms, including illuminance.

Photoelectric sensors

A photoelectric sensor is a device used to detect the distance, absence or presence of an object by using a light transmitter. A photoelectric sensor emits invisible infrared or visible red light to detect the presence of an object.

I recommend: www.electronics-manufacturers.com, an online resource for electronic products, provides information on the working of photoelectric sensors.

Phototransistors

A phototransistor is a semiconductor device that is highly sensitive to light. Phototransistors are used to switch or amplify current and can conduct current in either direction.

I recommend: PerkinElmer, Inc., a manufacturer of optoelectronic products, describes the features and applications of phototransistors.

Fiber optic cables

A fiber optic cable is a medium of signal transmission that transfers messages modulated on to light waves. It consists of a bundle of glass threads that can transmit light waves.

I recommend: ARC Electronics, a manufacturer of digital cellular modems, explains the concept of fiber optic cables.

Photocells

A photocell (also called photodetector or photosensor) can sense light or other electromagnetic waves. These devices are predominantly used for automatic switching of external lighting.

I recommend: Makingthings, a service provider of digital devices, provides an overview of photocell sensors.

Light sensors are useful tools. They can be used in a multitude of ways: from turning on street lights as daylight recedes, turning on spotlights outside one's home or business, turning on lights inside any building.

In a time of rising energy costs, light sensors have another benefit: saving your company or the homeowner money. Because the devices rely on the light sensors to activate them, the devices do not have to be on all the time. Below, you will find information about light sensors pricing and costs that can help you to not only buy the light sensor that will best suit the company's needs but its budget.

1. Explore the motion light sensor.

2. Price the photoelectric light sensor.

3. Check out ambient light sensors.

Action Steps
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Buy a motion light sensor for indoor and outdoor use

Motion light sensors can come as indoor light sensors and outdoor light sensors. The configurations can differ as well: to one single light to a pair of lights. The motion sensor light can also have different kinds of beams, such as more directed flood lights to wider-beamed flood lights.

I recommend: ELights.com has a selection of motion sensor lights in various configurations. The range in price from under $100.00 to over $300.00 depending on the lights. Shop Outdoor Lighting also has motion light sensors that come in various styles and range from under $100.00 to over $200.00.

Shop for the photoelectric light sensor

A photoelectric light sensor can not only detect an item, but it can find the object's position, as well as its color. This is done when light is projected in a certain area and the sensor gets back light that's reflected from the item.

I recommend: AutomationDirect has various configurations of photoelectric light sensors ranging in price from $50.00 to just under $100.00. Galco also has a range of photoelectric light sensors, which range in price to under $50.00 to under $200.00.

Check out the ambient light sensor

Ambient light sensors are sensitive to radiation. In this it is similar to human eyes and the manner they detect light. They are useful in devices like cell phones and monitors, enabling the user to see when light conditions are low.

I recommend: Photonics describes the ambient light sensors designed by Avago Technologies, which are available starting "at $0.45 in moderate volumes" (follow the link to the company). Sparkfun Electronics has ambient light sensors for under $2.00.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Contact the light sensor manufacturers when you need to buy light sensor. They will be able to give more information on light sensors. Ask about bulk discounts and guarantees as well.