LVDT Signal Conditioners — AC/AI Series

Key Specifications

Compatible SensorsAll 3/4/5/6-wire AC LVDTs

Excitation OutputFactory set 2V rms, 2 kHz (adjustable 1.6–2.4V rms)

Input Supply Options±15V DC / 12V DC / 24V DC / 230V AC

Output Options0–10V DC / ±5V DC / 4–20mA

Non-LinearityAs low as 0.3%

Operating Temperature–15°C to 50°C

Form FactorsCard (PCB mount) & Enclosed (DIN rail / bench)

CalibrationNABL accredited available

AC/AI Series

Overview

These LVDT Signal Conditioners have been designed to accept AC LVDTs of any standard make or model. Each module incorporates a complete signal chain — sinusoidal excitation oscillator, phase-sensitive demodulator, low-pass filter and output scaling amplifier — in a single compact package.

Available in PCB card format for integration into custom electronics, and enclosed module format for standalone bench or DIN rail installation. Features include adjustable zero positioning within the full stroke range, phase-lag/lead adjustment, and configurable output scaling.

✓Accepts any standard AC LVDT (3/4/5/6-wire)
✓Complete signal chain in one module
✓Adjustable zero position across full stroke
✓Phase-lag/lead adjustment capability
✓Multiple supply options: ±15V DC, 12/24V DC, 230V AC
✓Output: 0–10V DC, ±5V DC, or 4–20mA
✓Card (PCB) and enclosed module formats
✓NABL accredited calibration available

Configurations

Model Range

Model	Input Supply	Output	Form Factor	Dimensions
AC301	±15V DC	0–10V / ±5V DC	Card	160 × 100 mm
AC302	±15V DC	4–20mA	Card	160 × 100 mm
AC305	±15V DC	0–10V / ±5V DC	Card (compact)	100 × 65 mm
AI301-230M	230V AC	0–10V / ±5V DC	Enclosed	192 × 96 × 200 mm
AI301-230MA	230V AC	4–20mA	Enclosed	192 × 96 × 200 mm
AI301-24S	24V DC	0–10V / ±5V DC	Enclosed	180 × 110 × 25 mm
AI301-24SA	24V DC	4–20mA	Enclosed	180 × 110 × 25 mm

Technology

Key Features

Sinusoidal Excitation

Integrated low-distortion sinusoidal oscillator provides stable AC excitation for any LVDT sensor.

Phase-Sensitive Demodulation

Extracts displacement direction and magnitude with high accuracy, rejecting common-mode noise.

Adjustable Zero Positioning

Zero point can be set anywhere within the sensor's full stroke range for flexible installation.

Output Scaling

Configurable full-scale output to match your DAQ or PLC input range requirements.

Multi-Supply Compatibility

Available for ±15V DC, 12V DC, 24V DC and 230V AC supply rails to suit any installation.

Compact Form Factors

Card format as small as 100×65mm for OEM integration; enclosed modules for standalone use.

Resources

Downloads

LVDT Signal Conditioner Datasheet

Complete technical specifications, wiring diagrams and ordering information for all AC/AI series modules.

Download Datasheet (PDF)

Back to Displacement Sensors (LVDT)

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