Outer diameter : ∅58
Resolution : 25P/R

Black Dial
Output Mode : Voltage Output (NPN Tr.)　[Internal Resistance 2kΩ]
Power Supply : DC +4.5V to +13.2V

→UFO-M2 series data sheet is available in PDF here.

･Click Mechanism.
･Resolution available from 25 P/R or 100 P/R
･Outpur mode is selectable from 4 types.
･Estimated lead time : 16weeks.