The LP-22 series linear potentiometer is a cost effect solution for factory automation linear position sensing applications, such as: robotic motion control, X-Y table position feedback, flow control valve position, suspension travel, press and die position, injection molding machines, and mil/aero test stands. This 3-wire resistive film sensor is available in stroke lengths from 1 to 12 inches (25 to 300 mm), with a maximum linearity error of 2.5% of full scale.
The sensor comes with swivel rod eyes at each end for self-alignment and easy mounting. A 22 mm diameter anodized aluminum housing rated IP-61 protects the unit from airborne contaminants, and the sensor is rugged enough to withstand the typical shock and vibration environments of industrial shop floors.
For more information see the technical datasheet below.
- - Full Ranges From 1 to 12 inches (25 to 300 mm)
- - Self-Aligning Swivel Rod Eyes on Both Ends
- - 1 m Long, 3-Conductor Cable
- - 22 mm OD Anodized Aluminum Housing
| Operating Temperature: | -40 to 95 C |
| Temperature Coefficient: | <1.5 ppm/°C |
| Shock: | 50 g (IEC68-2-29, single hit) |
| Vibration: | 20 g (IEC68-2-6) |
| Environmental Protection: | IEC IP-61 |
| Input Current: | ≤12 mA |
| Resolution: | Infinite |
| Output Range: | 0 to 100% of input |
| Repeatability: | 0.01 mm (0.0004 inch) |
| Max Operating Speed: | 5 m/s |
Product | LP-22-025 | LP-22-050 | LP-22-100 | LP-22-150 | LP-22-200 | LP-22-250 | LP-22-300 |
Range (mm) | 25 | 50 | 100 | 150 | 200 | 250 | 300 |
Resistance ±20% | 2 k | 5 k | 5 k | 5 k | 5 k | 5 k | 5 k |
Max input Voltage | 12 | 24 | 24 | 24 | 24 | 24 | 24 |
Non-linearity %FS | ±2.5 | ±2.5 | ±2.5 | ±2.5 | ±2.5 | ±2.5 | ±2.5 |
Body length A (mm) | 79 | 104 | 154 | 204 | 254 | 304 | 354 |
Dimension B (mm) | 144 | 169 | 219 | 269 | 319 | 369 | 419 |
Weight (grams) | 115 | 130 | 165 | 190 | 215 | 245 | 270 |
Rod eye c-c (mm) | 139 | 164 | 214 | 264 | 314 | 364 | 414 |
Download LP-22 Potentiometer Data SheetThe LP-22 is a conductive plastic linear potentiometer offering an economical resistive position sensing solution for factory automation applications where an LVIT or LVDT's contactless operation and infinite life are not required, and where cost and simplicity of interface are the primary selection criteria. As a voltage divider, the LP-22 requires only a DC excitation voltage and a single analog input no signal conditioning module or carrier frequency is needed making it the lowest-complexity position sensor in the ASG product line.
Conductive Plastic vs. Wire wound Resistive Elements
The LP-22 uses a conductive plastic resistive element rather than the wire wound construction found in older potentiometers. Conductive plastic offers essentially infinite resolution there are no wire turns to step betweenand a smoother output without the micro-steps that wire wound elements produce as the wiper crosses successive turns. Conductive plastic also has a longer service life in most applications, as the uniform track surface distributes wear more evenly than the discrete wire-turn contact points of a wire wound element.
When to Choose a Potentiometer Over an LVDT or LVIT
The LP-22 is appropriate when the application can tolerate the wearing contact between the wiper and the resistive element, when the cost of an LVDT signal conditioner is not justified by the application requirements, and when the measurement environment does not expose the sensor to contamination and water that would accelerate wiper wear or short the sensor output. Robotics, X/Y table position feedback, and test stand actuator position in dry, clean environments are typical LP-22 applications. For harsh environments, continuous cycling duty, or applications requiring the LP-22's lifetime to exceed several million cycles, upgrading to an LVIT which uses the same simple DC-in/DC-out interface without any wearing contact should be considered.
