General Purpose Large Bore LVDT Position Sensors
FCNA20 Series
Features
- Diameter 20mm
- Range: ±1.25mm to ±250mm
- Operating temperature: -55°C to +105°C
- Stainless steel housing
- Protection Rating: IP61
Applications
- Machine and tool positioning
- Testing machines
- Valve position measurement
- Medical equipment
- Cylinder position measurement
- Oil/gas well monitoring
- Automatic detection of the device
The FCNA20 General-Purpose Series Position Sensor is a cost-effective LVDT that can be used as an in-situ replacement for Macro sensors' PR812 series and TE-HR series.
This series of LVDT sensors has the technical advantages of high resolution, good repeatability, low impedance, high sensitivity, good linearity, environmental adaptability and high reliability. The maximum linearity error is not more than ±0.25%.
The FCNA20 Series offers multiple technical specifications for customer selection. In addition to the standard options provided in the selection guide, customized solutions are available based on specific requirements, including but not limited to:
Mechanical Customizations:
- Teflon (PTFE)-lined core bushings for reduced friction and wear resistance
- Thread specifications (metric/imperial, custom pitch/length)
- Cable outlet configurations (axial, radial, or angled)
Special Environmental Adaptations:
- High-pressure resistance (for hydraulic/oil & gas applications)
- High-temperature operation (extended range up to 200°C+)
- Radiation hardening (suitable for nuclear or aerospace use)
In order to facilitate the actual application of the customer, we also supply a variety of accessories to match the sensor, the series of related mounting fixtures, signal processing equipment, cables and other accessories, please contact us for information.
Electrical parameters
| Parameters | Description |
| Input Voltage: | 1 to 12V AC, 3V rms |
| Input Frequency: | 400 to 10k Hz, 2.5 kHz(rms) |
| Linearity Error: | <±0.25% (Full stroke) |
| Repeatability Error: | <0.01% (Full stroke) |
| Hysteresis Error: | <0.01%(Full strokel) |
| Operating Temperature: | -55°C to +105°C |
| Thermal Coefficient | -0.02%/°C (nominal) |
| Vibration: | 20g, 2 kHz |
Dimensions
| Parameters | Model | FCNA20-000325 | FCNA20-000525 | FCNA20-001025 | FCNA20-001525 | FCNA20-002525 | FCNA20-005025 | FCNA20-010025 | FCNA20-015025 | FCNA20-020025 | FCNA20-025025 | FCNA20-040025 | FCNA20-050025 |
| Range | mm | ±1.27 | ±2.5 | ±5 | ±7.5 | ±12.5 | ±25 | ±50 | ±75 | ±100 | ±125 | ±200 | ±250 |
| Body length “A” | mm | 28.7 | 46 | 63.5 | 81.8 | 139.7 | 168.4 | 254 | 325.6 | 397.3 | 454.2 | 611.9 | 793.6 |
| Dimension “B” | mm | 20.3 | 33 | 41.9 | 49.5 | 87.6 | 101.6 | 134.6 | 142.2 | 177.8 | 177.8 | 177.8 | 215.9 |
| Null position "P" | mm | 14.3 | 23 | 31.7 | 40.9 | 69.8 | 84.2 | 127 | 162.8 | 198.6 | 227.1 | 305.9 | 396.8 |
| Sensitivity | mV/V/mm | 228 | 165 | 98.4 | 51.2 | 27.6 | 15.4 | 9.1 | 9.8 | 7.9 | 5.5 | 5.1 | 2.8 |
| Primary Impedance | Ω | ≥400 | ≥1000 | ≥1100 | ≥1100 | ≥460 | ≥460 | ≥330 | ≥315 | ≥275 | ≥310 | ≥260 | ≥550 |
Ordering Guide
| Description | Model | Part Number | Description | Model | Part Number | |
| ±1.27mm LVDT | FCNA20-000325 | 0356-0043 | ±50mm LVDT | FCNA20-010025 | 0356-0049 | |
| ±2.5mm LVDT | FCNA20-000525 | 0356-0044 | ±75mm LVDT | FCNA20-015025 | 0356-0050 | |
| ±5.0mm LVDT | FCNA20-001025 | 0356-0045 | ±100mm LVDT | FCNA20-020025 | 0356-0051 | |
| ±7.5mm LVDT | FCNA20-001525 | 0356-0046 | ±125mm LVDT | FCNA20-025025 | 0356-0052 | |
| ±12.5mm LVDT | FCNA20-002525 | 0356-0047 | ±200mm LVDT | FCNA20-040025 | 0356-0053 | |
| ±25mm LVDT | FCNA20-005025 | 0356-0048 | ±254mm LVDT | FCNA20-050025 | 0356-0529 | |
| OPTIONS | ||||||
| #4-40 UNC-2B threaded Core | / | XXXX-XXXX-005 | ||||
| Teflon (PTFE)-lined core bushings | / | XXXX-XXXX-020 | ||||
| Mild Radiation resistant | / | XXXX-XXXX-080 | ||||
| Mounting Block | MTD-20 | 0355-003 | ||||