Optical Dumpy Levels

Optical Dumpy Levels or Auto Levels are an older technology these days but still occupy a place in the levelling tool range.

Also sometimes called auto levels they automatically level once they have been manually roughly levelled into their self levelling range.  This is achieved with the use of a bulls eye vial.  Once the bubble is anywhere inside the circle the dumpy takes over and levels itself.

The operator looks through the dumpy and can read off heights from a cross hair in the view finder.  Dumpy levels are potentially incredibly accurate but do need two people to operate.  They do not use batteries so are always ready to go.

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