Abstract: Apparatus for measuring which is adapted for use with a remote digital readout. The measuring apparatus includes an elongated main beam and a measuring device slidably mounted on the beam. The beam includes a transparent ruled scale with markings positioned thereon corresponding to different measurements. Mounted within the device is an electro-optical decoder suspended by a unique flexure arrangement which detects marks as the device is slidably moved on the beam and produces electrical signals which are provided to the remote digital readout system which in turn produces a visual readout of measurement. The measuring device includes a second reader scale having similar markings thereon.