Flow Sensors - Kobold Instruments

The highly versatile KOBOLD DRH Paddle Wheel Flow Sensor delivers precise flow measurement with ±2.5% full scale accuracy across ranges from 0.05 to 13.2 GPM, featuring an exceptional seven material combinations to accommodate virtually any liquid or aggressive chemical application. Utilizing Hall effect technology to detect magnetic-embedded rotating paddle wheels, this compact flow sensor generates outputs proportional to flow rate and is available with frequency signals, 4-20 mA transmission, or comprehensive compact electronics featuring LED displays and programmable setpoint switches. With material options including brass, 316L stainless steel, POM (polyoxymethylene), and PVDF construction combined with ceramic axles and PTFE paddles, the DRH offers outstanding chemical compatibility and pressure resistance up to 580 PSIG while maintaining a consistent 176°F temperature rating across all configurations. Available in both 3/8" and 1" NPT connection sizes with horizontal flow orientation and minimal 14.5 PSI pressure drop at full flow, this versatile instrument provides exceptional value for industrial and OEM applications requiring reliable measurement in limited spaces. The DRH's modular design allows for easy integration into control systems via various electrical connection options including M12 connectors and DIN 43650 plugs, with lightweight construction (as little as 0.55 lb for plastic versions) and NEMA 4X protection ensuring reliable service in demanding environments.

The KOBOLD DIH rotating vane flow indicator provides immediate visual confirmation of liquid flow through its distinctive rotating propeller design, offering at-a-glance operational status for critical process applications. Available with nickel-plated brass, stainless steel, or POM housing options, this versatile indicator accommodates diverse industrial environments and chemical compatibility requirements while maintaining consistent performance. The transparent PMMA cover allows operators to easily monitor the eye-catching rotating propeller, instantly confirming proper system operation without the need for additional instrumentation or power. With flow ranges spanning from 0.05 GPM to 13.2 GPM (water) and pressure ratings up to 230 PSI, the DIH series adapts to numerous industrial applications while introducing minimal pressure drop of only 14.5 PSI at maximum flow. Installation is straightforward with standard 3/8" or 1" NPT connection options, allowing this compact and reliable visual indicator to be integrated into both new and existing systems while providing continuous operational feedback without maintenance concerns.

The KOBOLD DIG rotating vane flow indicator offers reliable visual confirmation of liquid flow with its vibrant paddle wheel that spins behind a transparent polysulfone cover, providing operators with immediate status verification without electronic components. Available in brass, stainless steel, or polypropylene housing options, this versatile device accommodates various chemical compatibility requirements while handling flow ranges from 0.13 GPM to 21 GPM of water-based fluids. With five connection sizes ranging from 1/8" to 1" NPT, the DIG series integrates seamlessly into diverse piping systems while maintaining pressure ratings up to 230 PSI (100 PSI for polypropylene models) and temperature capabilities up to 176°F. The robust design features a ceramic axle for extended service life and minimal maintenance requirements, while introducing only 14.5 PSI pressure drop at maximum flow rates to preserve system efficiency. Ideal for applications requiring continuous visual confirmation of process flow without electrical power or complex instrumentation, the DIG combines simple operation with durable construction to deliver reliable performance across a wide range of industrial liquid monitoring applications.

The versatile KOBOLD DRG Paddle Flow Sensor combines compact design, economical pricing, and exceptional adaptability to deliver reliable flow measurement for liquid applications from 0.15 to 37 GPM with ±3% full scale accuracy. Using advanced Hall effect technology to detect magnetic-embedded rotating paddles, this OEM-friendly instrument offers multiple output configurations including frequency signals, 4-20 mA analog transmission, or comprehensive compact electronics with LED display and programmable setpoint switches. Available in five distinct material combinations—from economical brass to high-performance stainless steel and all-plastic polypropylene versions for aggressive chemicals and high-purity water—the DRG provides excellent chemical compatibility with maximum operating pressures up to 580 PSIG and temperatures to 176°F. The low-profile design features NEMA 4X/IP65 protection, minimal pressure drop (14.5 PSI at 100% rated flow), and horizontal flow orientation with connection options ranging from 1/8" to 1" NPT to accommodate diverse installation requirements. With its modular electronic packages, lightweight construction (as little as 0.26 lb for the all-plastic version), and comprehensive connectivity options including M12 connectors and DIN 43650 plugs, the DRG delivers exceptional value for industrial, process control, and OEM flow monitoring applications where reliable measurement and space efficiency are critical requirements.

The KOBOLD DPM Pelton wheel flow sensor delivers precise flow measurement of water and water-based, low-viscosity, optically transparent liquids in a remarkably compact form factor ideal for space-constrained installations. Employing an innovative design where liquid passes through a precision nozzle and impinges directly onto a flat-blade Pelton turbine, this sensor provides exceptional accuracy (±1.5% of full scale for advanced models) while requiring no straight pipe runs before or after installation. The robust construction featuring brass or 316L stainless steel housing options combined with a sapphire axle/bearing assembly ensures outstanding durability and extended service life even in demanding industrial environments. Multiple output options—from basic frequency pulse signals to sophisticated 4-20 mA outputs and programmable compact electronics with integrated digital display—provide flexible integration with various control systems while maintaining measurement consistency across flow ranges from 0.24 GPH to 80 GPH. The sensor's versatile design allows mounting in any orientation with the axle maintained in the horizontal plane, facilitating straightforward installation in challenging locations while delivering reliable performance with an operating temperature range of -10°F to 176°F and pressure ratings up to 230 PSIG.

The Kobold DAA Flow Indicator is designed to maintain clear visibility without requiring downtime. Its self-cleaning mechanism activates with a twist, using internal wipers to remove buildup inside the glass. The flowing liquid then clears the remaining residue, keeping the viewing area clean. A bright rotor, red or white depending on size, gives immediate flow confirmation. Built with brass or stainless steel, the DAA supports flows from 0.11 to 26.4 GPM, pressures to 232 PSIG, and temperatures up to 212°F. It’s easy to install, universally mounted, and ideal for a wide range of applications where clear visual monitoring is essential. If you're looking for a paddle wheel flow indicator, rotor flow indicator, or flow indicator made in the USA, the Kobold DAA is a trusted choice.