The KOBOLD DRG paddle-wheel flow sensor offers the winning combination of compact size, low cost and versatility, which makes it the perfect OEM flow sensor. The DRG uses a Hall effect sensor to detect the passing of permanent magnets embedded within the rotating paddle wheel. The sensor can be supplied with either a frequency output, 4-20 mA output or a versatile compact electronics package providing an LED flow rate display with a 4-20 mA analog output or two programmable setpoint switches. The DRG is offered in five material combinations. An all-plastic version is available, making it suitable for use with high purity water and many types of aggressive, water-based chemicals.