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PHIDGETS Inc.

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

Differential Air Pressure Sensor 100 kPa

ID: 1139_0

This differential air pressure sensor plugs into an Analog Input or VINT Hub port and measures pressure from 0 kPa to 100 kPa.

$32.00 Quantity Available: 167 Qty Price 5$30.40
10 $28.80 25$25.60
50 $22.40 100$20.80

The 1139 Differential Pressure Sensor is a dual ported air pressure sensor that measures the pressure difference between the two ports. It can measure pressure from 0 kPa to 100 kPa.

Warning

 This sensor is designed to measure the pressure of clean, non-condensing air. Contact with moist air (i.e, human breath), dusty air, or other gases can damage the sensor.

Product Specifications

Sensor Properties
Sensor Type Gas Pressure (Differential)
Controlled By VoltageRatio Input
Sensor Output Type Ratiometric
Pressure Differential Min 0 Pa
Pressure Differential Max 100 kPa
Case Pressure Max 400 kPa
Pressure Resolution 111 Pa
Measurement Error Max ± 2.5 %
Warm-up Time 20 ms
Response Time Max 1 ms
Electrical Properties
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
Physical Properties
Operating Temperature Min -40 °C
Operating Temperature Max 125 °C
Recommended Tubing Size 332

Product History

Date Board Revision Device Version Comment
Oct 2012 0 N/A Product Release

Getting Started

Welcome to the 1139 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 1139 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 1139!

Using the 1139

Phidget Control Panel

In order to demonstrate the functionality of the 1139, 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:

First Look

After plugging in the 1139 into the 1018, and the 1018 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 1139 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!

Technical Details

General

The 1139 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 sensor voltage should default to about 0.2V, which corresponds to 0 kPa between the two ports.

Ports

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).

Take caution when connecting the pressure ports- this sensor only measures a positive pressure differential, and you could damage the sensor if you connect it in reverse. Ensure that the upper port is always at an equal or higher pressure than the lower port.

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.

Formulas

The Phidget libraries automatically convert voltage to pressure (kPa). See the Phidget22 API for more details. The Formula to translate voltage into Pressure is:

${\displaystyle {\text{Pressure (kPa)}}={\frac {{\text{Voltage}}\times 200}{9}}-4.444}$

${\displaystyle {\text{Pressure (psi)}}=({\text{Voltage}}\times 3.222)-0.6444}$

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
1019_1B $110.00 8 10 bit 1203_2B$95.00 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 Here's a list of our gas pressure sensors: Product Sensor Properties Image Part Number Price Sensor Type Pressure Min Pressure Max Pressure Differential Min Pressure Differential Max Pressure Resolution 1126_1$32.00 Gas Pressure (Differential) -25 kPa 25 kPa 55 Pa
1136_0 $32.00 Gas Pressure (Differential) -2 kPa 2 kPa 5 Pa 1137_0$32.00 Gas Pressure (Differential) -7 kPa 7 kPa 17 Pa
1138_0 $32.00 Gas Pressure (Differential) 0 Pa 50 kPa 56 Pa 1140_0$32.00 Gas Pressure (Absolute) 20 kPa 400 kPa 413 Pa
1141_0 $32.00 Gas Pressure (Absolute) 15 kPa 115 kPa 111 Pa PRE1000_0$15.00 Gas Pressure (Absolute) 50 kPa 110 kPa 250 mPa