KOBOLD Instruments, Inc. NDT - Static Pressure Level Switch

Product Features Field Adjustable Setpoint Perfect for Coating Dirty and Viscous Liquids 8 amp SPDT Contact Reliable and Economical The KOBOLD NDT level switch is especially suitable for level monitoring of liquids in open or vented tanks. The NDT uses a differential pressure cell to measure the height of the liquid above the bottom of its user supplied sensing tube. Operation of the NDT is simple. Install a pipe on the NDT such that the bottom of the pipe reaches to four (4) inches below the desired switchpoint. When the liquid level reaches the pipe it will seal off access to the pipe end. As the level continues to rise, the static pressure of the liquid outside the hose will exert a pressure on the air pocket trapped in the pipe (corresponding to the height of the medium above the pipe end.) The NDT's pressure switch is connected to the air pocket and factory adjusted to trip at four inches of water column pressure. The switching can thereby take place without the NDT's moving mechanisms ever contacting the medium. Since the pipe is user supplied, full flexibility in chemical compatibility with the process is afforded.