Products for USB Sensing and Control

Products for USB Sensing and Control


Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9
+1 403 282-7335

Precision Light Sensor

ID: 1127_0

Measures light intensities of up to 1000 lux and connects to an Analog Input or VINT Hub port.


Quantity Available: 213

Qty Price
5 $4.75
10 $4.50
25 $4.00
50 $3.50
100 $3.25

Replaced by the 1142 - Light Sensor 1000 lux.

The Precision Light Sensor measures human perceptible light level in lux; its measurement range is from 1 lux (Moonlight) to 1000 lux (TV studio lighting)

Comes packaged with

Product Specifications

Sensor Properties
Sensor Type Light
Controlled By Voltage Input (0-5V)
Sensor Output Type Non-Ratiometric
Light Sensor
Response Time Max 20 ms
Measurement Error Max ± 5 %
Peak Sensitivity Wavelength 580 nm
Light Level Min 1 lx
Light Level Max (3.3V) 660 lx
Light Level Max (5V) 1 klx
Electrical Properties
Current Consumption Min 2 mA
Output Impedance 1 kΩ
Supply Voltage Min 3.3 V DC
Supply Voltage Max 5 V DC
Physical Properties
Operating Temperature Min -30 °C
Operating Temperature Max 85 °C


Product History

Date Board Revision Device Version Comment
May 2008 0 N/A Product Release

Getting Started

Welcome to the 1127 user guide! In order to get started, make sure you have the following hardware on hand:

Next, you will need to connect the pieces:

1127 0 Connecting The Hardware.jpg
  1. Connect the 1127 to the 1018 with the Phidget cable.
  2. Connect the 1018 to your computer with the USB cable.

Now that you have everything together, let's start using the 1127!

Using the 1127

Phidget Control Panel

In order to demonstrate the functionality of the 1127, we will connect it to the 1018, and then run an example using the Phidget Control Panel on a Windows machine.

The Phidget Control Panel is available for use on both macOS and Windows machines. If you would like to follow along, first take a look at the getting started guide for your operating system:

Linux users can follow the getting started with Linux guide and continue reading here for more information about the 1127.

First Look

After plugging in the 1127 into the 1018, and the 1018 into your computer, open the Phidget Control Panel. You will see something like this:

1018 Panel.jpg

The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:

  • Serial number: allows you to differentiate between similar Phidgets.
  • Channel: allows you to differentiate between similar objects on a Phidget.
  • Version number: corresponds to the firmware version your Phidget is running. If your Phidget is listed in red, your firmware is out of date. Update the firmware by double-clicking the entry.

The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.

Voltage Input

Double-click on a Voltage Input object in order to run the example:

1018 Sensors VoltageInput.png

General information about the selected object will be displayed at the top of the window. You can also experiment with the following functionality:

  • Modify the change trigger and/or data interval value by dragging the sliders. For more information on these settings, see the data interval/change trigger page.
  • Select the 1127 from the Sensor Type drop-down menu. The example will now convert the voltage into illuminance (lux) automatically. Converting the voltage to illuminance (lux) is not specific to this example, it is handled by the Phidget libraries, with functions you have access to when you begin developing!

Technical Details


The human eye is less sensitive to changes in light intensity than the 1127, but is able to see a wider range. The Human eye range is from 50µlx (starlight) to 100klx (extremely bright sunny day). The 1127, on the other hand, is able to measure from 1lx (Moonlight) to 1000lx (TV studio lighting). The 1127 is able to detect higher frequency fluctuations in light levels than the human eye. If you notice noise on the signal that you cannot perceive yourself, it is probably due to incandescent light flicker, or other varying light sources. This sensor is designed to respond to visible light, and it can sense light from concentrated sources like laser pointers (although be careful with high-power lasers, as they could damage the sensor). It will also have a very muted response to IR light that is close to the visible spectrum (700-800nm). The 1127 is non-ratiometric which means that you cannot rely on the sensor saturating at 5 volts. To be conservative, interpret a sensor voltage of over 4.75V as saturated, with the true light level being unknown.

Sensitivity Response

The 1127 uses the AMS104 light sensor package. The following graph illustrates the sensor's sensitivity to specific wavelengths of light.



The Phidget libraries automatically convert voltage to illuminance (lux). See the Phidget22 API for more details. The formula to translate voltage from the sensor into illuminance is:

Phidget Cable


The Phidget Cable is a 3-pin, 0.100 inch pitch locking connector. Pictured here is a plug with the connections labelled. The connectors are commonly available - refer to the Analog Input Primer for manufacturer part numbers.

What to do Next

  • Software Overview - Find your preferred programming language here to learn how to write your own code with Phidgets!
  • General Phidget Programming - Read this general guide to the various aspects of programming with Phidgets. Learn how to log data into a spreadsheet, use Phidgets over the network, and much more.
  • Phidget22 API - The API is a universal library of all functions and definitions for programming with Phidgets. Just select your language and device and it'll give you a complete list of all properties, methods, events, and enumerations that are at your disposal.

Interface Boards and Hubs

This sensor can be read by any Phidget with an Analog Input or VINT Hub port. It will connect to either one using the included Phidget cable. VINT Hub ports can behave just like Analog Inputs, but have the added flexibility of being able to be used as digital inputs, digital outputs, or ports to communicate with VINT devices. For more information about VINT, see the VINT Primer.

Product Voltage Inputs
Image Part Number Price Number of Voltage Inputs Voltage Input Resolution
1010_0 $80.00 8 10 bit
1011_0 $50.00 2 10 bit
1018_2 $80.00 8 10 bit
1019_1 $115.00 8 10 bit
1203_2 $125.00 8 10 bit
DAQ1000_0 $20.00 8 12 bit
HUB0000_0 $30.00 6 (Shared) * 16 bit

Phidget Cables

This sensor comes with its own Phidget cable to connect it to an InterfaceKit or Hub, but if you need extras we have a full list down below. You can solder multiple cables together in order to make even longer Phidget cables, but you should be aware of the effects of having long wires in your system.

Product Physical Properties
Image Part Number Price Cable Length
3002_0 $2.00 600 mm
3003_0 $1.50 100 mm
3004_0 $3.00 3.5 m
3034_0 $1.50 150 mm
3038_0 $2.25 1.2 m
3039_0 $2.75 1.8 m

Have a look at our light sensors:

Product Sensor Properties Light Sensor
Image Part Number Price Sensor Type Controlled By Light Level Min Light Level Max (5V)
1142_0 $7.00 Light Voltage Input (0-5V) 1 lx 1 klx
1143_0 $7.00 Light Voltage Input (0-5V) 3 lx 70 klx
LUX1000_0 $12.00 Light VINT 188 μlx 220 klx