Analog signals can be used to create multiple software set points in the controller for recipe-driven flexible production systems. They can also be used to differentiate between fully gripped objects of different physical sizes. For soft or deformable items, the amount of applied gripper pressure can be dynamically adjusted to produce just the right degree of squeeze on the product to ensure a secure grip without marking or otherwise damaging the item.

For grippers driven by linear-acting prime movers, there are two primary approaches to determining gripper jaw actual (analog) position: indirect and direct.

Indirect stroke measurement with analog magneto-inductive linear sensors (BIL)
Analog magneto-inductive linear position sensor is fitted to the gripper cylinder housing in order to sense the internal magnet mounted on the pneumatic actuator piston continuously.  BIl - the magneto-inductive linear position sensor gives an absolute analog position signal such as 4-20mA or 0-10V that is fed back to the control system.
See all magneto-inductive sensors Micro BIL

Direct stroke measurement with analog magneto-inductive linear sensor s(BIL)
Ideal for short to mid stroke lengths. Sensor detects magnet ring in the air cylinder. Housing shape is similar to most “T” slots. Travel distance is fixed at 10mm.
See all magneto-inductive sensors Micro BIL

Parallel gripper with analog feedback device directly measuring jaw travel  

Direct measurement with analog inductive sensors
Ideal for short stroke feedback. Analog proximity sensor measures position based on lateral travel across the sensor face. Maximum travel distance is determined by diameter of sensor.
See all inductive analog sensors (BAW)

Parallel gripper with analog proximity sensor directly measuring lateral jaw travel.

  
Direct measurement of inclined target with analog inductive sensors
Ideal for long stroke measurements. Analog sensor detects jaw travel by following an incline. The min and max points of the incline are based on the sensor’s measurement range.
See all inductive analog sensors (BAW)

Parallel gripper with analog proximity sensor measuring jaw travel of an incline.