AGFRC Position Feedback Servos

New from servo manufacturer AGFRC is their range of Position Feedback servos.  Beside the normal hobby servo function, these servos can provide position feedback via a potentiometer through the additional fourth orange wire, which is capable to measure the output angle directly.  Available in two high torque 40Kg models and a 50Kg Super high torque high torque model, they all feature steel gear chain design for heavy duty application.  Simply hookup the analog feedback wire to any Analog pin of Microcontroller.  With this position feedback function, you can ensure the servo has reached its designated position or detect any potential impediments, of course, this allows additional closed-loop control from your controller.  Enable for more complex robotics or industry applications, such as determining when the servo has reached its target, detecting when the output is blocked, or implementing your own higher-level closed-loop position control.  Custom spec is acceptable.

Features
Full Aluminium Fast Cooling Case
Magnetic Waterproof IP67 (on IA81BHLW and IA73BHLW)
2S LiPo High Voltage Capable
High Power Brushless Motor
Separate Single Wire with JR Female Connector
Using Typical RC Servo Commands for Operation
Help to Implement Close-loop Position Control
Suitable for Robotics, Industry, Interactive artwork, Small-scale animatronics etc.
Equipped with a standard 3-pin connector matching most popular modelling controllers and an
additional pin indicating the position of the servo.

Source: AGFRC [agfrc.com]