Brand

Keyence

Precision measurement sensors, machine-vision systems, laser markers, and code readers used across manufacturing quality control and automation lines.

About Keyence

Keyence manufactures precision measurement and sensing equipment used across manufacturing quality control and automation. In metering applications, the clamp-on flow sensor lines are the standout: the FD-Q series for water and liquids and the FD-G series for compressed air measure flow from outside the pipe with no cutting, no welding, and no process shutdown.

For a plant that wants departmental water or compressed-air accountability but cannot take a production line down to install inline meters, clamp-on sensing is often the only viable option. Installation takes minutes, the sensor can be relocated as measurement priorities change, and there is no pressure drop or leak path introduced into the piping.

Emergent Metering uses Keyence clamp-on sensors for rapid submetering deployments in manufacturing and food-and-beverage plants, and pairs them with permanent inline meters where long-term revenue-grade accuracy is the requirement. Our guide on clamp-on versus inline flow meters walks through where each belongs.

Alongside flow, we carry the Keyence MP-F air quality multi-sensors — flow, pressure, temperature and humidity on a single compressed-air tap in NPT 3/8", 1/2" and 1" — and the GP-M heavy-duty digital pressure sensors with built-in temperature measurement, spanning ±14.5 PSI through 5802 PSI. Both are IP67 with IO-Link output, so they drop straight into an existing controls or metering panel.

Choosing a Keyence sensor

Model	Measures	Range or size	Mounting	Best for
FD-R series	Liquids — water and process fluids	Model number is the nominal bore in millimetres; the series covers DN40 through DN200 (1½" to 8")	Clamp-on, outside the pipe	Non-invasive water and process liquid metering on live lines
FD-G series	Compressed air	Model number is the nominal bore in millimetres, across FD-G25, FD-G50, FD-G125 and FD-G200	Clamp-on, outside the pipe	Compressed-air surveys and branch metering with no shutdown
GP-M001T / GP-M010T / GP-M025T	Pressure with built-in temperature	±14.5 PSI, 145 PSI and 362.6 PSI respectively	Inline, IP67, IO-Link output	Low and mid-range pressure monitoring
GP-M100T / GP-M250T / GP-M400T	Pressure with built-in temperature	1450 PSI, 3626 PSI and 5802 PSI respectively	Inline, IP67, IO-Link output	High-pressure hydraulic and process lines
MP-FN10 / MP-FN20 / MP-FN80	Flow, pressure, temperature and humidity	NPT 3/8", 1/2" and 1" respectively	Single compressed-air tap, IP67, IO-Link output	Air quality and consumption from one tap

Specifications

Clamp-on flow measurement with no cutting, welding or tapping into the pipe
No pressure drop and no leak path introduced, because the line is never opened
Sensors can be relocated as measurement priorities change
GP-M pressure sensors span ±14.5 PSI through 5802 PSI with temperature on the same device
MP-F air quality multi-sensors combine four measurements on one compressed-air tap
IP67 rating with IO-Link output across the GP-M and MP-F families

Figures from the Keyence FD-R instruction manual and the published product specifications. Download the Keyence datasheets

Keyence FAQ

What is a clamp-on flow meter, and when is it the right choice?

A clamp-on flow meter measures from outside the pipe using ultrasonic transducers, so nothing is cut, welded or tapped into the line. That makes it the practical option when a production line cannot be shut down to install an inline meter, when the piping cannot be modified, or when the measurement point may need to move later. It also introduces no pressure drop and no leak path, because the pipe is never opened.

What is the difference between the Keyence FD-R and FD-G series?

The FD-R series measures liquids — water, process fluids and similar — across FD-H32, FD-R50, FD-R80, FD-R125 and FD-R200, where the number indicates the nominal pipe size the clamp fits. The FD-G series measures compressed air across FD-G25, FD-G50, FD-G125 and FD-G200. Both clamp on from outside the pipe; the difference is the medium each is calibrated and designed for.

Can clamp-on meters be used for tenant billing or revenue-grade measurement?

Clamp-on meters are best suited to consumption studies, departmental cost allocation, leak quantification and process monitoring rather than revenue-grade billing. Where a measurement has to hold up to a billing dispute, an inline meter with a documented accuracy class is the right specification. Many sites use both: clamp-on sensors to find where the consumption is, inline meters where the number has to be defensible.

What does Keyence offer besides flow meters?

Emergent Metering carries the Keyence GP-M series of heavy-duty digital pressure sensors, spanning ±14.5 PSI through 5802 PSI with built-in temperature measurement, and the MP-F series air quality multi-sensors in NPT 3/8", 1/2" and 1", which combine flow, pressure, temperature and humidity on a single compressed-air tap. Both are IP67 with IO-Link output, so they drop into an existing controls or metering panel.

How quickly can a clamp-on meter be put on a pipe?

Installation is measured in minutes rather than hours, because it involves positioning and clamping the transducers rather than breaking into the pipe. That speed is what makes short-term studies viable — a meter can be placed on one line for a two-week baseline, then moved to the next.

Which is better for compressed air, clamp-on or inline?

From $1,000.00

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Keyence MP-FN10 - Air Quality Multi-Sensor, NPT 3/8"

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All Keyence products

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