Copper Alloy Pressure Gauges

The gauge needle, when positioned in the upper zone during extraction, indicates the espresso has been extracted with too much pressure. This occurs when the water follow through the ground coffee is too slow and results in an over extracted espresso that is very dark and bitterr with a mottled and uneven crema.

Causes for over extraction include the grind being too fine and/or too much ground coffee in filter basket.

ESPRESSO Pressure Gauge

IDEAL ESPRESSO ZONE

The gauge needle, when positioned in the middle zone during extraction, indicates the espresso will be extracted at the ideal pressure.

UNDER EXTRACTED ZONE

The gauge needle, when positioned in the lower zone during extraction, indicates the espresso has been extracted with insufficient pressure. This occurs when the water flow through th eground coffee is too fast and results in an under extracted espresso that is watery and lacks crema and flavour.

Causes for under extraction include the grind being too coarse and/or insufficient coffee in filter basket and/or under tamping.

OVER EXTRACTED ZONE