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This post was last edited by sdwfsgyykai on 2019-11-12 07:57. The ultrasonic external level switch is a new type of measuring and alarm device, primarily used for detecting the liquid level in storage tanks, enabling alarms for upper and lower limits or for detecting whether there is liquid present in pipes. The material of the storage tank can be various metals, non-metals, or non-foaming plastics. It is a contactless level switch that utilizes \"frequency-variable ultrasonic technology\" and is widely applicable to the level detection of various liquids. Its measuring probe is installed on the outer wall of the container, making it a completely contactless level detection instrument that measures the level from outside the tank. So, how is an ultrasonic external level switch installed? Tools/Ingredients: Silicone grease, probe. Methods/Steps: 1. Select the installation location. When choosing where to install the probe on the tank wall, it is first necessary to determine its installation height based on the alarm height specified in the customer’s site specifications or design requirements ； The probe should be installed on the side of the spiral staircase, to facilitate the installation of the external level switch as well as subsequent maintenance. 2. For the installation joints, two large surfaces should be cleared out on the storage tank; the size of these surfaces should be determined based on the size of the probe. (The joint surface spacing is determined based on the actual probe spacing selected), to ensure that the probe joint surfaces are flat and smooth. If the joint surface of the tank is smooth and flat, there is no need to grind the tank. The specific details will be determined based on the actual conditions on site. 3. Apply silicone grease to the joint surface – To apply silicone grease to the installation joint, first ensure that the joint surface is smooth and even ； It is then necessary to ensure that there is silicone grease on both the surface of the probe and the interface where it contacts the tank wall; after the probe is installed, any gaps at that interface should be filled with silicone grease, otherwise the silicone grease needs to be reapplied. The gap at the joint between the probe and the tank wall should be filled with silicone grease; otherwise, the silicone grease needs to be reapplied. 4. Installation and fixation of the probe: It is recommended to use fast-setting, high-strength adhesive for attaching and fixing the probe. Apply the glue to the two ears of the suction cup and the tank wall. Be careful not to apply glue to the contact surface between the tank wall and the probe; apply silicone grease to that surface instead! When choosing this method to install the probe, it is necessary to ensure that the joint surfaces and the locations of the alarm points have been selected appropriately, and that the surface of the probe is covered with silicone grease at this time. 5. Schematic diagram of the installation of the external level switch. Precautions: If the tank wall has an insulation layer, it is necessary to remove the insulation from the rectangular area in the middle of the probe, in order to ensure that there are no welds between the two probes The distance between the two probes of external level switches is determined in two types: a type designed for spherical tanks, where the distance between the two probes is not less than 60 CM ； Designed for non-spherical tanks, with a distance of at least 1 meter between the two probes.