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GT Precision LVDT Gauging Transducer

Very high accuracy
High cycle life
Stainless steel
Infinite resolution
Precision linear bearings
Miniature
image of GT Precision LVDT Gauging Transducer
These transducers are for displacement / position measurement. They make an accurate position measurement of the movement of the armature (the sliding part) relative to the body of the displacement transducer.
This transducer uses the Linear Variable Differential Transformer (LVDT) principle which means that it is probably the most robust and reliable position sensor type available. The strength of the LVDT sensor's principle is that there is no electrical contact across the transducer position sensing element which for the user of the sensor means clean data, infinite resolution and a very long life.
The GT series gauging transducer employs precision linear bearings to optimise the LVDTs measurement precision and repeatability.
Spring return version.
Our spring displacement transducer has bearings to guide the armature inside the measurement sensor and a spring which pushes the armature to the fully out position. Spring return LVDTs are appropriate where it is not possible to connect the transducer armature to the moving component being measured.
End (axial) exit cable.
dimensional drawing of LVDT spring return
D1=8,0mm
Type Range Linearity error (% F.S.) L X (nom) B- (No clamp zone) Total weight Spring force at X Spring rate Inward over-travel Outward over-travel Sensitivity (nom)
GT0500Z ±0,5mm ±0,25 26mm 7,3mm 5,5mm 7g 1,0N 1,7N/cm 0,3mm 0,3mm 110mV/V
GT1000 ±1mm ±0,25 or ±0,1 53mm 14,2mm 14mm 11g 0,8N 2,6N/cm 1,4mm 0,3mm 150mV/V
GT2500 ±2,5mm ±0,25 or ±0,1 58mm 20,3mm 18mm 13g 1,1N 2,6N/cm 0,8mm 0,3mm 375mV/V
GT5000 ±5mm ±0,25 or ±0,1 87mm 22,0mm 30mm 16g 1,5N 1,5N/cm 1,3mm 0,3mm 700mV/V
Side (radial) exit cable.
dimensional drawing of LVDT spring return
A=5,6mm
D1=8,0mm
Type Range Linearity error (% F.S.) L X (nom) B- (No clamp zone) Total weight Spring force at X Spring rate Inward over-travel Outward over-travel Sensitivity (nom)
GT0500XRA ±0,5mm ±0,25 33mm 7,3mm 5,5mm 7g 1,0N 1,7N/cm 0,3mm 0,3mm 110mV/V
GT1000RA ±1mm ±0,25 or ±0,1 57mm 14,2mm 14mm 12g 0,8N 2,6N/cm 1,4mm 0,3mm 150mV/V
GT2500RA ±2,5mm ±0,25 or ±0,1 61mm 20,3mm 18mm 16g 1,1N 2,6N/cm 0,8mm 0,3mm 375mV/V
GT5000RA ±5mm ±0,25 or ±0,1 91mm 22,0mm 30mm 21g 1,5N 1,5N/cm 1,3mm 0,3mm 700mV/V

Air push version.
The air-push version of the GT displacement transducer is extended by the application of air to the displacement transducer and is retracted by an internal spring. This is useful where the LVDTs position measurement tip must be retracted to allow components to move on a conveyor for example.
End (axial) exit cable.
dimensional drawing of LVDT spring return
AD=3mm
AL=8mm
Air filter=<0,0005mm
Relative humidity=<60%
Type Range Linearity error (% F.S.) L X (nom) B- (No clamp zone) Total weight Minimum Maximum Inward over-travel Outward over-travel Sensitivity (nom)
GT1000P ±1mm ±0,25 or ±0,1 72mm 26,0mm 14mm 11g 40kPa 65kPa 1,4mm 0,3mm 150mV/V
GT2500P ±2,5mm ±0,25 or ±0,1 77mm 20,0mm 18mm 13g 45kPa 65kPa 0,8mm 0,3mm 375mV/V
GT5000P ±5mm ±0,25 or ±0,1 112mm 22,0mm 30mm 16g 45kPa 55kPa 1,3mm 0,3mm 700mV/V

Specification
Excitation/supply (acceptable) 0,5V to 7V rms, 2kHz to 10kHz (sinusoidal)
Excitation/supply (calibrated) 5V rms, 5kHz (sinusoidal)
Output load 100k Ω
Linearity error (Standard) ±0,25% F.S.
Linearity error (Optional on some models) ±0,1% F.S.
Repeatability 0,00015mm
Temperature coefficient (span) ±0,01% F.S. /℃ (typical)
Operating temperature range -40℃ to 100℃
Electrical termination 2m (integral cable) Longer available to order,

Connection details
GT


Due to our policy of on-going development, specifications may change without notice. Any modification may affect some or all of the specifications for our equipment. All dimensions and specifications are nominal.
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20190308