Probe for monitoring the surface level of a fluid in a vessel and a method of installing the probe in the vessel

A method of installing a probe inside a vessel for monitoring a surface level of a fluid in the vessel from outside the vessel, the vessel having a side wall and the probe having a first end, a second end, a detection unit therebetween, at least a first fastening device and at least a second fastening device for fastening the probe to the side wall of the vessel and at least one device for transmitting surface level-related information out of the vessel, the method comprising the steps of:

• providing the vessel side wall with a first opening;
• providing the vessel side wall with a second opening through the side wall;
• passing the second end of the probe, the second fastening device for fastening the probe and the detection unit of the probe through the first opening and inside the vessel;
• orienting the second end of the probe towards the second opening;
• attaching the second end of the probe to the side wall of the vessel at the second opening;
• and
• fastening the first end of the probe to the side wall of the vessel at the first opening.