Products for USB Sensing and Control
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Magnetic Sensor

ID: 1108_0
Mature: This product (or a similar replacement with a compatible form, fit and function) will be produced as long as the parts and components required to make it are available.

You can measure magnetic fields or sense the proximity of a magnet with this hall-effect sensor.

$7.00 Quantity Available: 1000+ Qty Price 5$6.65
10 $6.30 25$5.60
50 $4.90 100$4.55

The 1108 is a Hall-effect sensor that provides a voltage output that is proportional to the applied magnetic field.

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_2B $80.00 8 10 bit 1019_1B$110.00 8 10 bit
1203_2B $70.00 8 10 bit DAQ1000_0$20.00 8 12 bit
HUB0000_0 $30.00 6 (Shared) * 16 bit SBC3003_0$120.00 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

Getting Started

Welcome to the 1108 user guide! In order to get started, make sure you have the following hardware on hand:

Next, you will need to connect the pieces:

1. Connect the 1108 to the HUB0000 with the Phidget cable.
2. Connect the HUB0000 to your computer with the USB cable.

Now that you have everything together, let's start using the 1108!

Using the 1108

Phidget Control Panel

In order to demonstrate the functionality of the 1108, we will connect it to the HUB0000, 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:

First Look

After plugging in the 1108 into the HUB0000, and the HUB0000 into your computer, open the Phidget Control Panel. You will see something like this:

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 Ratio Input

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

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 1108 from the Sensor Type drop-down menu. The example will now convert the voltage into Gauss automatically. Converting the voltage to Gauss 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

General

The 1108 is optimized, sensitive, and temperature-stable. It is a ratiometric Hall effect sensor which provides a voltage output that is proportional to the applied magnetic field. Accuracy can be improved on a specific device with offset and/or gain calibration (using known flux).

Formulas

The Phidget libraries can automatically convert sensor voltage into Gauss by selecting the appropriate SensorType. See the Phidget22 API for more details. The Formula to translate voltage ratio into Gauss is:

${\displaystyle \Phi {\text{(G)}}=(0.5-{\text{VoltageRatio}})\times 1000}$

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

• Programming Languages - Find your preferred programming language here and learn how to write your own code with Phidgets!
• Phidget Programming Basics - Once you have set up Phidgets to work with your programming environment, we recommend you read our page on to learn the fundamentals of programming with Phidgets.

This device doesn't have an API of its own. It is controlled by opening a VoltageRatioInput channel on the Phidget that it's connected to. For a list of compatible Phidgets with VoltageRatio Inputs, see the Connection & Compatibility tab.

You can find details for the VoltageRatioInput API on the API tab for the Phidget that this sensor connects to.

Product Specifications

Sensor Properties
Sensor Type Magnetic Field
Controlled By VoltageRatio Input
Sensor Output Type Ratiometric
Magnetic Flux Min -500 G
Magnetic Flux Max 500 G
Measurement Error Max ± 0.5 %
Magnetic Zero Balance Max 15 G
Magnetic Resolution 1 G
Electrical Properties
Current Consumption Max 2 mA
Output Impedance 1 kΩ
Output Voltage Min 200 mV DC
Output Voltage Max 4.7 V DC
Supply Voltage Min 4.5 V DC
Supply Voltage Max 5.5 V DC
Physical Properties
Operating Temperature Min -20 °C
Operating Temperature Max 85 °C
Neodymium Magnets
Mangetic Field Strength (@ 6.5 mm) 500 G
Length 8.7 mm
Diameter 5 mm

Product History

Date Board Revision Device Version Comment
June 20050N/AProduct Release