Products

Series 330

3/8 Inch AC Gaging LVDTs

The Series 330 3/8″ AC Gaging LVDTs provide precise linear displacement sensing in a compact, spring loaded package. Advanced coil winding techniques are employed to minimize package length and optimize overall performance. Spring forces have been carefully selected to insure the proper balance of mechanical frequency response and tip force. Available in strokes ranging from ± 0.005″ to ± 1.0″, these sensors are ideally suited to material thickness measurements, single or multi-point surface profiling, creep testing, or any other application requiring the use of a small, spring loaded LVDT. These transducers are also an excellent replacement for a standard dial indicator.

Key Features

  • Ranges from ±0.005” to ±1.0”
  • Self-Lubricating Bearing
  • Non-linearity ≤ 0.20%
  • 20 MicroInch Repeatability

SPECIFICATIONS - ELECTRICAL (Reference frequency 7.0 KHz)

MODEL UNITS 0330-0000 0331-0000 0332-0000 0333-0000 0334-0000 0335-0000 0336-0000 0337-0000
LINEAR RANGE ±Inches
±(mm)
0.005
(0.13)
0.01
(0.26)
0.025
(0.64)
0.05
(1.27)
0.1
(2.54)
0.25
(6.35)
0.5
(12.7)
1.0
(25.4)
NON LINEARITY < ±0.25% Max. < ±0.20% Max.
OVERTRAVEL OUTPUT MONOTONIC OVER ENTIRE MECHANICAL TRAVEL
TEMPERATURE RANGE -4°F to +176°F (-20°C to +80°C) (OPERATING)    -65 °F to +176°F (-54°C to +80°C) (STORAGE)
TEMP. COEFFICIENTS ZERO: < ±0.001% Linear Range/°F      SENSITIVITY: < ±0.01% /°F
SENSITIVITY V/in./V ±10% 4 4 4 4 4 2 1 0.5
PHASE ANGLE ° 5 5 5 5 5 0 0 0
INPUT IMPEDANCE Ohms 260 255 250 245 480 320 300 355
INPUT RESISTANCE Ohms DC 36 36 36 36 60 22 30 40
OUTPUT RESISTANCE Ohms DC 135 135 135 135 205 210 170 185
NULL VOLTAGE % V Ex. Max. 0.2 0.25 0.3 0.4 0.8 1 1 1
MAXIMUM EXCITATION 15 VRMS

SPECIFICATIONS - MECHANICAL

MODEL UNITS 0330-0000 0331-0000 0332-0000 0333-0000 0334-0000 0335-0000 0336-0000 0337-0000
TOTAL LENGTH A Inches (mm) 2.45 (62.2) 2.45 (62.2) 2.45 (62.2) 2.45 (62.2) 2.93 (74.4) 5.35 (136) 6.86 (174) 10.45 (265)
SHAFT EXTENSION B Inches (mm) 0.65 (16.5) 0.65 (16.5) 0.65 (16.5) 0.65 (16.5) 0.83 (21.1) 1.22 (30.9) 1.69 (42.9) 2.60 (66.0)
NULL POSITION C Inches (mm) 0.1 (2.54) 0.1 (2.54) 0.1 (2.54) 0.1 (2.54) 0.15 (3.81) 0.35 (8.89) 0.57 (14.5) 1.15 (29.2)
SPRING FORCE @ NULL Lbs. 0.73 0.73 0.73 0.73 1.07 0.74 0.57 0.70
FREQ. RESPONSE Hz 250 180 110 75 45 18 6 6

DIMENSIONAL DRAWING

TRANS-1401-Products-330

SCHEMATIC

TRANS-1401-Products-330-1

CAD Drawings

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ACCESSORIES

PART NUMBER DESCRIPTION
A002-0041 Adapter for alternate contact tips: 5-60 Thread to 4-48 UNF-2B Thread
G000-0000 Contact Tip, AGD #7
G000-0008 Contact Tip, .30″ Spherical O.D.; 5-60 Internal Threads. (Included with transducer)

DC-DC OPERATION WITH OPTIONAL OSCILLATOR/DEMODULATOR

To facilitate prototyping, or in instances where the preference is a DC in – DC out system, any of the standard or High Temperature Series 330 can be used in conjunction with the Model 1000- 0014 Oscillator/Demodulator. Designed to work together, the DC system gives the same level of performance as provided by the AC LVDT alone. The high level DC output voltage can be directly interfaced with analog circuits as well as data acquisition cards, PLCs, or A/D converters. Provisions for customizing the Model 1000-0014 to provide zero offsets and nonstandard gains allow a simple and cost effective method of tailoring a system to meet individual customer requirements.

SYSTEM SPECIFICATIONS (Combined Performance of LVDT and 1000-0014)

MODEL UNITS 0330-0000 0331-0000 0332-0000 0333-0000 0334-0000 0335-0000 0336-0000 0337-0000
SIGNAL OUTPUT ±VDC 0.2 0.4 1.0 2.0 4.0 5.0 5.0 5.0
OUTPUT CURRENT ±3 mA without distortion
OUTPUT RIPPLE VRMS 0.004 0.008 0.02 0.03 0.03 0.03 0.03 0.03
POWER INPUT ±14.5 to ±28 VDC @ ±100 mA Max., Input polarity protected
TEMPERATURE RANGE 1000-0014 +32 °F to +158°F (0°C to +70°C ) (Operating)   -65 °F to +257°F (-54 °C to +125°C ) (Storage)
TEMP. COEFFICIENTS 1000-0014 Zero < ±0.00035 VDC/°F   Sensitivity < ±0.02%/°F

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