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A red mushroom head on a yellow background.
Also known as: E-stop, Emergency stop button, Mushroom head stop, Red button on yellow
An emergency stop is a red mushroom-headed button on a yellow ground, and the colour pairing is reserved: nothing else may use it. The head is mushroom-shaped so it can be hit with a palm, an elbow or a body rather than pressed with a finger.
Denotes an emergency stop control, standardised as a red mushroom-headed actuator on a yellow background.
Contexts: Public information
Reserves the red-on-yellow combination for emergency stop functions alone, so no other control may use it.
Contexts: Public information
Uses a mushroom head so the control can be operated with a palm, elbow or body rather than requiring a finger on a small target.
Contexts: Public information
Latches when operated and must be deliberately reset, so the machine cannot restart merely because the actuator was released.
Contexts: Public information
A large domed red button with a broad flat top, mounted on a yellow circular or square backing plate.