Q: Is a signal conditioner needed for the Standard AC LVDT?

Yes. The AS Series is a pure AC LVDT — it outputs a raw differential AC voltage and requires an external signal conditioner to supply the AC excitation and convert the output to a usable DC signal. AGMPL supplies compatible signal conditioner and indicator modules.

Q: What does the 'ASR' suffix mean in the model number?

ASR denotes the through-bore (radial cable entry) variant. The body is 6mm shorter than the standard AS, and the cable exits radially rather than from the end, allowing installation in tighter axial spaces without additional adaptor fittings.

Q: Can the Standard AC LVDT be used at elevated temperatures?

The standard AS Series is rated 0–70°C. For sustained elevated ambient temperatures up to 120°C or 150°C, choose the Series ASH (High Temperature AC LVDT), which uses PTFE cable and an IP65 all-stainless steel housing.

Q: What are the typical applications for the Series AS?

Material testing machines (UTMs, spring testers), soil consolidation and triaxial testing, structural deflection measurement, textile machinery, hydraulic cylinder position feedback, and general industrial or laboratory displacement measurement from ±5mm to ±350mm.

Q: Does the Standard AC LVDT come with calibration?

Yes. Every AS Series LVDT ships with NABL-accredited factory calibration data traceable to national standards, with a 3-year warranty.

Question 1

What excitation voltage and frequency does the Series AS LVDT require?

Accepted Answer

The AS Series requires 1–5V rms sinusoidal excitation at 2 kHz (standard), with a supported range of 1–5 kHz. An external signal conditioner supplies the AC excitation and demodulates the differential output voltage into a proportional DC signal.

Question 2

What measurement ranges are available for the Standard AC LVDT?

Accepted Answer

14 standard models cover ±5mm to ±350mm (10mm to 700mm total stroke), all in the same 22mm stainless steel body diameter. The ASR variant (6mm shorter body) uses radial cable entry for installations with limited axial clearance.

Question 3

How accurate is the Series AS and what linearity can I expect?

Accepted Answer

±0.25% FSR for models up to ±75mm, ±0.3% for ±100mm models, and up to ±1.0% for the 350AS. Temperature coefficient is <0.025% FSR/°C, making it highly stable across the full 0–70°C operating range.

Question 4

Is a signal conditioner needed for the Standard AC LVDT?

Accepted Answer

Yes. The AS Series is a pure AC LVDT — it outputs a raw differential AC voltage and requires an external signal conditioner to supply the AC excitation and convert the output to a usable DC signal. AGMPL supplies compatible signal conditioner and indicator modules.

Question 5

What does the 'ASR' suffix mean in the model number?

Accepted Answer

ASR denotes the through-bore (radial cable entry) variant. The body is 6mm shorter than the standard AS, and the cable exits radially rather than from the end, allowing installation in tighter axial spaces without additional adaptor fittings.

Question 6

Can the Standard AC LVDT be used at elevated temperatures?

Accepted Answer

The standard AS Series is rated 0–70°C. For sustained elevated ambient temperatures up to 120°C or 150°C, choose the Series ASH (High Temperature AC LVDT), which uses PTFE cable and an IP65 all-stainless steel housing.

Question 7

What are the typical applications for the Series AS?

Accepted Answer

Material testing machines (UTMs, spring testers), soil consolidation and triaxial testing, structural deflection measurement, textile machinery, hydraulic cylinder position feedback, and general industrial or laboratory displacement measurement from ±5mm to ±350mm.

Question 8

Does the Standard AC LVDT come with calibration?

Accepted Answer

Yes. Every AS Series LVDT ships with NABL-accredited factory calibration data traceable to national standards, with a 3-year warranty.

Model	Full Stroke Range	Body Length — AS (mm)	Body Length — ASR (mm)	Sensitivity (mV/V/mm)	Linearity (% FSR)
005AS / 005ASR	±5 mm (0–10 mm)	67	61	40 mV/V/mm	±0.25%
010AS / 010ASR	±10 mm (0–20 mm)	107	101	20 mV/V/mm	±0.25%
015AS / 015ASR	±15 mm (0–30 mm)	127	121	13 mV/V/mm	±0.25%
020AS / 020ASR	±20 mm (0–40 mm)	147	141	10 mV/V/mm	±0.25%
025AS / 025ASR	±25 mm (0–50 mm)	167	161	8 mV/V/mm	±0.25%
030AS / 030ASR	±30 mm (0–60 mm)	187	181	6 mV/V/mm	±0.25%
050AS / 050ASR	±50 mm (0–100 mm)	267	261	4 mV/V/mm	±0.25%
075AS / 075ASR	±75 mm (0–150 mm)	367	361	2.5 mV/V/mm	±0.3%
100AS / 100ASR	±100 mm (0–200 mm)	467	461	2 mV/V/mm	±0.3%
150AS / 150ASR	±150 mm (0–300 mm)	667	661	1.3 mV/V/mm	±0.3%
200AS / 200ASR	±200 mm (0–400 mm)	867	861	1.0 mV/V/mm	±0.3%
250AS / 250ASR	±250 mm (0–500 mm)	1067	1061	0.8 mV/V/mm	±0.4%
300AS / 300ASR	±300 mm (0–600 mm)	1267	1261	0.65 mV/V/mm	±0.5%
350AS / 350ASR	±350 mm (0–700 mm)	1467	1461	0.55 mV/V/mm	±1.0%

Standard AC LVDT

Overview

Available Models

Applications

Material Testing Automation

Soil & Geotechnical Testing

Spring Testing Machines

Textile Machinery Automation

Position Measurement Systems

Structural Deflection Monitoring

Downloads

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Frequently Asked Questions

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