Linear Encoders are generally available in two types, absolute and incremental, and are defined by their position signals. Absolute linear encoders create a unique position signal that is available anywhere along travel with the exact position being read after power cycling. Incremental encoders do not generate a unique signal and is zeroed after power-down. They rely on another switch or encoder for initial reference.

When it comes to linear encoders, engineers look for important performance specifications including linear measurement range, counts per distance, and lines per distance. The linear measurement range is the full range of travel that can be encoded. Counts per distance determine the minimum linear position increment that can be distinguished. Lines per distance refers to the actual marks of the moving linear element being encoded.

Gurley offers two technologies for linear encoders: incremental and our patented Virtual Absolute(R) brand of scales.  For more information on these offerings, please click on one of the selections detailed above (both true absolute and Virtual Absolute are detailed in the Rotary Absolute section).  For general information on Virtual Absolute technology please visit www.virtualabsolute.com.

 

GPI LINEAR ENCODER SELECTION GUIDE

Note: For all incremental encoders, max. resolution is after 4x quadrature decode in the user's electronics 

Linear Incremental Encoders- Modular  Kit-Type Versions.jpg

Gurley Model 7700 Incremental and Virtual Absolute Encoder

Series: 7700

Length: <1m <39"

Max. Accuracy (+/- microns): Call Factory

Max. Resolution (microns): 0.1

Notes: Modular Kit Encoder

Gurley Model 9710 Modular Incremental Encoder

Series: 9710

Length:<1m <39"

Max. Accuracy (+/- microns): Call Factory

Max. Resolution (microns): 0.25

Notes: Modular Encoder

Gurley Model 9717 Incremental Modular Linear Encoder

Series: 9717

Length: <3.2m <125"

Max. Accuracy (+/- microns): Call Factory

Max. Resolution (microns): 0.5

Notes: Modular Encoder

 

Gurley Models LR18, LR25 and LR35 Incremental Linear Encoders

Series: LR

Length: <3.3m

Max. Accuracy (+/- microns): 3

Max. Resolution (microns): .05

Notes: three profiles

Gurley Models P20 and P40 Measuring Gauges

Series: Plunger Type

Length: 40mm

Max. Accuracy (+/- microns): 0.5

Max. Resolution (microns): .05

Notes: 20 or 40mm strokes

 
 

Gurley Model 7700 Incremental and Virtual Absolute Encoder

Series: 7700

Length: <1m <39"

Max. Accuracy (+/- microns): Call factory

Max. Resolution (microns): 0.1

Notes: VA Modular Kit Encoder

Gurley Model 9710 Virtual Absolute Encoder

Series: 9710VA

Length: <1m <39"

Max. Accuracy (+/- microns): Call factory

Max. Resolution (microns): 0.25

Notes: VA Modular Encoder

 
 
linear-asolute-encoder Enclosed Versions.jpg

Gurley Series Vl18 Virtual Absolute Encoder

Series: VL18

Length: <39"

Max. Accuracy (+/- microns): 3

Max. Resolution (microns): 0.25

Notes: Virtual Absolute(R)

Gurley Models LA18, LA20, LA25, and LA35 Absolute Linear Encoders

Series: LA

Length: <3.3m

Max. Accuracy (+/- microns): 3

Max. Resolution (microns): 0.05

Notes: three profiles

 
 

Need a special encoder not listed above?  
Gurley produces custom encoders at standard lead times and prices.  
Contact Sales for information.