According to its maker, the NBK-M provides many of the features of the standard NBK Series bypass level indicators, but at a fraction of the cost. Similar to the full-sized NBK Series, the NBK-M level indicator uses the company’s ring magnet float design, allowing the user the ability of adding roller indicators, switches, and other options almost anywhere on the periphery of the bypass tube. The use of lighter gauge materials and a streamlined manufacturing process makes it a very economical choice for lower pressure and short length level measuring applications. A datasheet is available at http://koboldusa.com/sites/default/files/product_files/Level-indicator-bypass-mini-economical.pdf
Kobold Instruments Inc.