Hohner Automation Ltd. manufactures a range of optical encoders for the oil industry.  To be used for drilling and logging applications.

All solutions are electrically fully certified to the latest ATEX standards.

 Flowline Sensor

A paddle type flow line sensor that uses absolute encoder technology producing a reliable and precise 4...20 mA signal.

The complete is fully certified intrinsically safe to Zone 0 (Ex ia IIC) and complies with the latest ATEX standards

Data Sheet 

 Drawworks Encoder

Hohner makes optical shaft encoders to be used specifically for the oil & gas industry.  Mainly for the draw works applications.

Shafts from 5/8" threads up to 2" threads.  Standard hollow shaft available as well.

Electronics are all certified intrinsically safe to the latest UL, ATEX and IECEx standards.  As Ex ia IIB and IIC

Data Sheets