The Kobold BGN Series variable area flow meters are ideal for difficult applications that require high pressure capability, high temperature operation, or low pressure loss. The BGN's standard design is available in stainless steel, PTFE-clad stainless steel, or Hastelloy C-22. The standard BGN is well suited for water, most viscous liquids, and compressed gases in line sizes up to 6".

The direct reading scales are calibrated for media viscosity, density, operating pressure, and temperature. Electronic limit switches and an analog flow transmitter are available as options and are able to operate via intrinsically safe methods of protection and may be used in hazardous areas where intrinsically safe installations are permitted. Custom designs for high pressure, high temperature, special fittings, and special materials (such as Monel and tantalum) are available. Other options include self-draining flow bodies, gas or liquid damping, and a flow counter module.

Measuring ranges for water span from 0.0022-0.022 GPM up to 57.24-572.2 GPM, and for air from 0.008-0.08 SCFM up to 64.74-647.4 SCFM. Accuracy varies by model: for liquids, BGN-S/H is ±1.6% FS, BGN-P is ±2.0% FS; for gases, BGN-S/H is ±1.8% FS, BGN-P is ±2.2% FS. The magneto-resistive signal transmission ensures reliable operation.