String Pot Displacement Sensor: 50 inch (1270 mm)

Highlights

String Potentiometers with a spring loaded string can be pulled out to measure distances or displacements
Accuracies to +/- 1% Full Scale
String pots available in 12.5 inches, 25 inches, 50 inches and 80 inch ranges.
USB output with DI-1000U-5V interfaces
Wireless output with DI-1000ZP-5V or DI-1000WiFi-5V or DI-1000BLE-5V interfaces all of which include a rechargeable battery
If you need higher precision, please look at our iDisp Series Digital Displacement Gages with USB Output or the iLVDT linear potentiometers with USB or Wireless output

String Potentiometers are variable resistors with a spring loaded string that can be pulled out to measure displacements. The resistance of the device changes depending on how much displacement is applied to the string. These are used typically to measure large displacements for e.g. to measure the movement of Ailerons, Rudders, Flaps and other parts that are used to control and navigate aircraft.

iSP String Pot

These string pots have a simple three wire output configuration:
- Power - DC Voltage
- Ground
- Output Voltage

In a typical application the user will supply 5V DC to the sensor and you will get an output voltage typically between 0 and 5 V from zero to full scale displacements. If you supply 10 V, the output voltage will be between 0 and 10 V. The output varies linearly with displacement and hence a simple linear equation can be used to compute the displacement measured by measuring the change in voltage output. We provide a calibration certificate with each order shipped.

These string pots can be used in standalone analog mode (with a DC power supply) or can be combined with our DI-1000U-5V or DI-1000ZP-5V 24-bit Digital Interface to get either USB or Wireless output directly on your PC using our SensorVUE software.

These string pots are spring-loaded for easy return of the probe to original position and have mounting plates so it can be mounted vertically or horizontally as needed for your application.

String Pot - USB Configuration

One iSP string pot
One DI-1000U 24-bit digital load cell interface
Single-channel SensorVUE software

String Pot - Wireless Configuration

One iSP string pot
One DI-1000ZP wireless digital load cell interface
Single-channel SensorVUE software

Force & Displacement Measurement Solutions with USB Output

You can combine any USB load cell solution we offer with a USB displacement measurement solution as shown below to quickly put together a system that allows you to simultaneously measure both force and displacement on a PC. Our SensorVUE solution allows you to display, log and plot data from both force and string pots within a single program and a single log file with user selectable time intervals.

One iSP string pot
One RAS1 load cell
One DI-1000U 24-bit digital load cell interface
Single-channel SensorVUE software

Force & Displacement Measurement Solutions with Wireless Output

You can combine any of the wireless load cell solution we offer with a wireless displacement measurement solution as shown below to quickly put together a system that allows you to simultaneously measure both force and displacement on a PC wirelessly. Our SensorVUE solution allows you to display, log and plot data from both force and string pots within a single program and a single log file with user selectable time intervals. The DI-1000ZP wireless interface comes with a rechargeable battery for truly cordless operation up to 1000 feet away from a PC.

One iSP string pot
One RAS1 S-Beam Load Cell
One DI-1000ZP 24-bit wireless digital load cell interface
SensorVUE software

SensorVUE Software

Our SensorVUE software allows you to mix and match different kinds of sensors and display, log and plot all of them within a single interface. It can handle force and displacement sensors simultaneously as shown below. It can not only show multiple force sensors and one displacement sensors as a Value vs. Time plot, but in additional it can also plot Force vs. Displacement plots and allow a user to characterize material properties! This allows you to create a simple, inexpensive self made universal testing machine at a much lower cost than what one can purchase it for in the market.

Application Development

If you are looking to develop your own custom software application, our digital USB wired and wireless load cell/string pot interfaces offer convenient ASCII commands to obtain displacement information directly from the sensors without need for any signal conditioning or data processing.

With just a few commands you'll be able to incorporate force/displacement information into your application.

You can use Visual Basic, Visual C++, Matlab, LABView or any other application development environment to create your custom applications with our string pot interfaces.

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