Encoder

The co. introduces what it calls an explosion-proof version of its ROD 420 rotary encoder. Made with a standard, 58-mm-dia housing and an overall 83-mm length, the encoder complies with the requirements of directive 94/9 EG (ATEX 100a), the co. notes, and is available with line counts of 250 to 5,000. The maximum surface temperature is given at 248 deg F, with an additional temperature sensor triggering a warning signal to return the system to a safe operating condition.

Heidenhain Corp., 847/490-1191. www.heidenhain.com