digital height gauges / height rippers (3x)

Lot of 3 digital height gauges / height splitters, mixed designs, each mounted on a solid base plate. Devices come from industrial test equipment stocks (\"test aids\" marked). Condition visibly used.
 

1) Digital height ripper, large version
Scaling up to approx. 600 mm
Solid steel base with large round hole
Digital display unit (older model, display not tested)
Height adjustment via clamping lever
Steel measuring spout, screwed
Traces of use, visually heavily used
2) Digital height ripper, medium version
Scaling up to approx. 300 mm
Digital display with buttons: ON/OFF, ZERO, HOLD, TOL, ABS, SET
Stainless steel scale (\"Stainless Hardened\")
Compact measuring carriage
Solid base block made of steel
Used condition, display not tested
3) Digital height ripper, other medium design
Also scaling up to approx. 300 mm
Label \"Test aid\" available
Digital display with +/- and mode instructions (older model)
Solid foot block
Used condition