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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=0.31''
X=Center of range
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 (±0.02'') ±0.25 1.02'' 0.29'' 0.2'' 0.2oz 3oz 16oz/inch 0.01'' 0.01'' 110mV/V
GT1000 ±1mm (±0.04'') ±0.25/±0.1 2.10'' 0.6'' 0.55'' 0.4oz 3oz 24oz/inch 0.06'' 0.01'' 150mV/V
GT2500 ±2.5mm (±0.1'') ±0.25/±0.1 2.26'' 0.8'' 0.71'' 0.4oz 4oz 24oz/inch 0.03'' 0.01'' 375mV/V
GT5000 ±5mm (±0.2'') ±0.25/±0.1 3.41'' 0.9'' 1.18'' 0.5oz 5oz 14oz/inch 0.05'' 0.01'' 700mV/V
Side (radial) exit cable.
dimensional drawing of LVDT spring return
A=0.22''
D1=0.31''
X=Center of range
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 (±0.02'') ±0.25 1.30'' 0.3'' 0.2'' 0.2oz 3oz 16oz/inch 0.01'' 0.01'' 110mV/V
GT1000RA ±1mm (±0.04'') ±0.25/±0.1 2.25'' 0.6'' 0.5'' 0.4oz 3oz 24oz/inch 0.06'' 0.01'' 150mV/V
GT2500RA ±2.5mm (±0.1'') ±0.25/±0.1 2.41'' 0.8'' 0.7'' 0.6oz 4oz 24oz/inch 0.03'' 0.01'' 375mV/V
GT5000RA ±5mm (±0.2'') ±0.25/±0.1 3.58'' 0.9'' 1.2'' 0.7oz 5oz 14oz/inch 0.05'' 0.01'' 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=0.12''
AL=0.31''
Air filter = 0.00002''
Relative humidity = 60% (maximum)
X=Center of range
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 (±0.04'') ±0.25/±0.1 2.83'' 1.0'' 0.6'' 0.4oz 6psi 9psi 0.06'' 0.01'' 150mV/V
GT2500P ±2.5mm (±0.1'') ±0.25/±0.1 3.04'' 0.8'' 0.7'' 0.5oz 7psi 9psi 0.03'' 0.01'' 375mV/V
GT5000P ±5mm (±0.2'') ±0.25/±0.1 4.39'' 0.9'' 1.2'' 0.6oz 7psi 8psi 0.05'' 0.01'' 700mV/V

Specification
Excitation/supply (acceptable) 0.5V to 7V rms, 2kHz to 10kHz (sinusoidal)
Excitation/supply (calibrated) 5V rms, 5kHz (sinusoidal)
Linearity error (Standard) ±0.25% F.S.
Linearity error (Optional on some models) ±0.1% F.S.
Repeatability 0.000006''
Temperature coefficient (span) ±0.006% F.S. /℉ (typical)
Operating temperature range -40℉ to 212℉
Electrical termination 6.6ft (integral cable) Longer available to order.

Connection details
GT