Quick Delivery and Comprehensive Support Most products are in stock and ready for same-day shipping - contact us to get your order started

Flow Sensors / Flow Meters

A flow sensor/meter for liquid and gas. KEYENCE has developed various clamp-on types to enable stable flow rate measurement with no pipe modification. These devices can be used on small tubes to large pipes. The lineup also includes electromagnetic and Coriolis flow sensors as well as environmental resistant and sanitary types.

Download Catalogs

Liquid flow rate

FD-Q series - Clamp-on Flow Sensor

Compatible with a variety of pipe materials and liquids, the FD-Q Series Clamp-on Flow Sensor can detect the flow rate of a liquid without the need for any pipe modification. This device enables the detection of a wide variety of liquids, including water (and pure water), oil, and chemicals. Detection is possible on both metal and resin pipes up to 2" in diameter. Unlike conventional sensors, installation and operation are also easy on high-pressure pipes. Costs are significantly reduced with the minimal installation required and the completely non-wetted design eliminates the risk of pressure loss or increased maintenance. Additionally, the large indicator provides real-time status information.

Catalogs Price Inquiry

FD-X series - Clamp-on Micro Flow Sensor

The FD-X Series Clamp-on Micro Flow Sensor can be easily installed from outside the pipe and detect flow rates as low as 0.1 mL/min (and shot amounts as low as 0.001 mL). The device does not come into contact with the liquid, preventing problems such as pressure loss and clogging. The non-contact design also means the device is not affected by the properties of the liquid (ex. viscosity). Even coating/filling applications of grease, adhesives, flux, sealants, chemicals, and other liquids are possible with the FD-X series. The design also prevents pressure drops, enabling flow rate measurement with no adverse effects on equipment conditions, such as jetting and spraying functions. Also, this clamp-on technology means there is no pipe cutting or modification required.

Catalogs Price Inquiry

FD-R series - Clamp-on Flow Meter

KEYENCE's FD-R Series Clamp-on Flow Meter is designed for pipes as large as 8". Installation is easy and requires only a screwdriver. The device can be mounted to a variety of materials including stainless steel, iron, copper, PVC, and resin. Both flow and temperature monitoring is possible for a wide variety of liquids—from water (including pure water) to oil, chemicals, and high-pressure liquids—at temperatures between -4°F and +248°F. The device does not come into contact with the liquid, so there is no risk of liquid-based corrosion or degradation, reducing maintenance time and costs. The rugged metal construction includes an easy-to-read indicator light, and data can be recorded directly on the device. The IP69K enclosure rating and NEMA4X compliance make this sensor both highly reliable and convenient for indoor and outdoor use.

Catalogs Price Inquiry

FD-M series - Non-Wetted Electrode Electromagnetic Flow Sensors

The FD-M Series Non-Wetted Electrode Electromagnetic Flow Sensor is the first factory automation flow sensor to adopt a free-flowing structure. Unlike floating-element and paddlewheel devices, the free-flowing structure of the FD-M Series has no moving parts or obstructions in the flow pipe, greatly reducing the risk of clogging. With no moving parts, the sensor is not subject to mechanical wear, which ensures a long service life. There is also virtually no pressure loss in the pipe, so the pump uses even less energy. Unlike conventional electromagnetic systems, this device detects liquid from outside the pipe, making it highly resistant to insulating deposits inside the pipe while minimizing maintenance. Two sensor types are available: one with a separate amplifier that allows flow rate monitoring using the LEDs on the sensor head and one with an integrated amplifier and a dual-row digital display for easy setup.

Catalogs Price Inquiry

Gas flow rate

FD-G series - Clamp-On Gas Flow Meter

The FD-G Series Clamp-on Gas Flow Meter can be easily installed from outside the pipe with only a screwdriver. The clamp-on design greatly reduces installation costs by eliminating the need for pipe modification. Detecting flow from outside the pipe eliminates the risk of restricting or blocking the flow of gas. It also eliminates the risk of leakage from new fittings. The device is compatible with stainless steel and iron pipes from—3/4" to 8"—and can measure compressed air, nitrogen, and other gases. The high-accuracy measurement, paired with a minimum sensitivity of 0.018 CFM, can be utilized for both large flows and incredibly small leaks. The high-definition display can also show both the total flow rate and the current flow rate for a set period, at the same time. Necessary functions for air management are also included, such as automatic leak volume measurement and monetary conversion.

Catalogs Price Inquiry

Benefits of Flow Sensors / Flow Meters

Flow Sensor / Flow Meter Case Studies

Frequently Asked Questions About Flow Sensors / Flow Meters