The 1126 Differential Pressure Sensor is a dual ported air pressure sensor that measures the pressure difference between the two ports. It can measure both positive and negative pressure from –25kPa to +25 kPa.
|This sensor is designed to measure the pressure of clean, non-condensing air. While the media resistant gel does enable the sensor to be used in a wider variety of environments, the lifespan of the sensor could still be affected. For more information, check the product manual.|
|Sensor Type||Gas Pressure (Differential)|
|Controlled By||VoltageRatio Input|
|Sensor Output Type||Ratiometric|
|Pressure Differential Min||-25 kPa|
|Pressure Differential Max||25 kPa|
|Pressure Resolution||55 Pa|
|Measurement Error Max||± 5 %|
|Warm-up Time||20 ms|
|Response Time Max||1 ms|
|Supply Voltage Min||4.8 V DC|
|Supply Voltage Max||5.3 V DC|
|Current Consumption Max||10 mA|
|Output Impedance||1 kΩ|
|Output Voltage Min||250 mV DC|
|Output Voltage Max||4.8 V DC|
|Operating Temperature Min||-40 °C|
|Operating Temperature Max||125 °C|
|Recommended Tubing Size||3⁄32″|
Welcome to the 1126 user guide! In order to get started, make sure you have the following hardware on hand:
- 1126 - Differential Gas Pressure Sensor ± 25kPa
- Any Phidget with a Voltage Ratio Input port, here are some compatible products. We will be using the HUB0000 for this guide.
- USB cable and computer
- Phidget cable
Next, you will need to connect the pieces:
- Connect the 1126 to the HUB0000 with the Phidget cable.
- Connect the HUB0000 to your computer with the USB cable.
Now that you have everything together, let's start using the 1126!
Using the 1126
Phidget Control Panel
In order to demonstrate the functionality of the 1126, 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:
Linux users can follow the getting started with Linux guide and continue reading here for more information about the 1126.
After plugging in the 1126 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 1126 from the Sensor Type drop-down menu. The example will now convert the voltage into pressure (kPa) automatically. Converting the voltage to pressure (kPa) is not specific to this example, it is handled by the Phidget libraries, with functions you have access to when you begin developing!
The 1126 uses bipolar processing to provide an accurate, high level analog input signal that is proportional to the applied pressure. When the sensor is plugged in, the voltage defaults to 2.5V ±2%.
The sensor comes with a positive top port and a negative bottom port. These ports have a diameter of 2.79mm to 3.30 mm (nominal 3mm). For hosing, we recommend using polyurethane tubing. We have had good results with 2.4mm ID tubing from EMI. In imperial measurement, 3/32” ID tubing is equivalent. This is available through laboratory supply stores such as Cole Parmer.
The Phidget libraries can automatically convert sensor voltage into pressure (kPa) by selecting the appropriate
SensorType. See the Phidget22 API for more details. The Formula to translate voltage ratio from the sensor into pressure is:
- Pressure (kPa)=(55.55×VoltageRatio)−27.7777
- Pressure (psi)=(VoltageRatio×8.05) - 4.0277
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.
1126_1B - Differential Air Pressure Sensor ± 25kPa
- Brand: Phidgets
- Product Code: ES000058
- Availability: In Stock