he Portalevel® Mini is the highly versatile ultrasonic level indicator. It is ideal for the vast majority of fire servicing applications.The device is completely handsfree. With the main unit hanging around the operator’s neck, therefore, allowing the service technician to have two hands available to work. With the SPA feature, the signal output can be increased when working on challenging or corroded cylinders. Also, a simple LED indication showing when liquid is detected.