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Description
Professional Instrumentation · UK Stock
FMT-3 Electronic Flow Meter
Horizontal Orientation · ±1.5% Accuracy · Digital LCD · IP54 Rated
The FMT-3 is the instrument of choice for workshop managers, maintenance engineers, and fleet operators who require verifiable, real-time compressed air flow data. Engineered to exacting tolerances, it delivers laboratory-grade measurement accuracy in a robust, industrially-hardened housing — purpose-built for the demands of UK workshop and industrial environments.
“Exactly what we needed for our tyre bay. The horizontal orientation integrates perfectly into our existing pipework and the digital readout is clear even in poor lighting. Accuracy is spot on — we verified it against our calibrated reference and it was within spec immediately out of the box.”
Performance Credentials
Why Professionals Specify the FMT-3
Real-Time Precision
±1.5% full-scale accuracy with continuous digital display updates. Capture every cubic metre of compressed air flowing through your system — no estimation, no guesswork.
Workshop-Ready Engineering
Horizontal orientation integrates directly into standard pneumatic pipework layouts. Compact footprint, IP54-rated housing, and backlit LCD ensure reliable operation in demanding workshop conditions.
Data-Driven Efficiency
Quantify compressed air consumption, identify system leaks, and validate compressor output. The FMT-3 provides the hard data required for energy audits, ISO 50001 compliance, and preventive maintenance programmes.
UK Stock & Expert Support
Held in UK inventory for same-day dispatch. Full English documentation, technical pre-sales advice, and after-sales support from our specialist pneumatics team — no import delays, no language barriers.
Engineering Data
Technical Specifications
| Model | FMT-3 Electronic Flow Meter |
| Mounting Orientation | Horizontal |
| Measurement Technology | Electronic digital flow sensing |
| Accuracy | ±1.5% of reading (full scale) |
| Display | Digital LCD with backlight |
| Media Compatibility | Compressed air, inert gases (N₂, Ar) |
| Connection | Standard pneumatic fittings (verify thread compatibility) |
| Power Supply | Battery or external (model dependent) |
| Operating Temperature | −10°C to +60°C |
| Housing Material | Industrial-grade polymer and metal alloy |
| Ingress Protection | IP54 — dust and splash protected |
| Barcode / GTIN | AC014031109005333 |
| SKU | air_comp1461 |
Use Cases
Ideal Applications
Technical Guidance
Installation & Commissioning
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01Select Mounting Location
Choose a horizontal pipe run downstream of the compressor and all air treatment equipment (dryer, filters, receiver). Ensure a minimum of 5× pipe diameter of straight, unobstructed pipe upstream and downstream of the meter for accurate measurement.
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02Prepare Connections
Verify thread type and size compatibility. Apply PTFE tape or a liquid thread sealant rated for compressed air service. Do not over-apply sealant — excess material can contaminate the sensing element.
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03Install the Meter
Thread the FMT-3 into position, ensuring the flow direction arrow on the body aligns with system flow direction. Tighten to the manufacturer's specified torque — do not over-tighten polymer housings.
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04Power & Zero Calibration
Connect the external power supply or install the battery. With the system at zero flow, follow the on-screen prompts to complete zero calibration. This step is critical for measurement accuracy.
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05Verify & Commission
Pressurise the system gradually. Confirm the display shows expected flow rates at known operating conditions. Inspect all connections for leaks using soapy water or an electronic leak detector.
Long-Term Reliability
Maintenance & Care
- ✦ Inspect display, housing, and connections quarterly for physical damage, corrosion, or contamination
- ✦ Verify measurement accuracy annually against a traceable calibrated reference meter
- ✦ Replace battery per manufacturer schedule or immediately upon low-battery indicator activation
- ✦ Maintain clean, dry, filtered compressed air upstream — particulate and moisture contamination are the primary causes of sensing element degradation
- ✦ Store in a clean, dry environment at temperatures within the operating range if removed from service
- ✦ Log all maintenance activities and calibration results for audit trail and warranty compliance
Our Commitment
Why Specify Air Compressors UK
Held in our UK warehouse. Same-day dispatch on orders placed before cut-off. No import delays, no customs complications.
Specialist pneumatics team available for pre-sales sizing advice and post-installation technical support. We speak the language of compressed air.
Every unit inspected prior to dispatch. We stand behind the products we supply — if it leaves our warehouse, it meets specification.
Credit terms and volume pricing available for qualifying businesses. Contact our trade desk to discuss your requirements.
Technical Q&A
Frequently Asked Questions
What is the difference between horizontal and vertical orientation flow meters?
Horizontal orientation meters are designed for installation in horizontal pipe runs — the most common configuration in workshop compressed air distribution systems. Vertical meters are specified when system layout or space constraints require vertical pipe mounting. The FMT-3 horizontal model is optimised for standard workshop and industrial installations and should not be installed in a vertical orientation, as this may affect measurement accuracy and internal drainage.
Can the FMT-3 be used with gases other than compressed air?
The FMT-3 is factory-calibrated for compressed air and is compatible with inert gases including nitrogen (N₂) and argon (Ar). For other gas types, reactive gases, or applications requiring ATEX certification, consult the technical datasheet or contact our support team to confirm compatibility and any accuracy correction factors that may apply.
How do I select the correct meter size for my compressed air system?
Flow meter sizing is determined by your system's normal operating flow rate range and pipe bore diameter. As a general rule, select a meter that operates within the middle 60% of its rated range during typical use — operating at the extremes of the range reduces accuracy. Contact us with your system's maximum and minimum flow rates, operating pressure, and pipe size for a definitive sizing recommendation.
Does the FMT-3 require on-site calibration after installation?
The FMT-3 is factory-calibrated and ready to use following the zero calibration procedure described in the installation guide. For applications where measurement traceability is required (ISO 50001, energy audits, billing metering), we recommend annual verification against a UKAS-traceable calibrated reference meter and retention of calibration records.
Is the FMT-3 suitable for outdoor or exposed installations?
With an IP54 ingress protection rating, the FMT-3 is protected against dust ingress and water splashing from any direction — suitable for sheltered outdoor locations such as covered plant rooms or canopied compressor houses. For fully exposed outdoor installations subject to direct rainfall, UV exposure, or temperature extremes beyond the −10°C to +60°C operating range, a weatherproof enclosure is recommended. Contact us for guidance on suitable enclosure options.
What straight pipe run is required upstream and downstream of the meter?
For accurate measurement, a minimum of 5× the pipe internal diameter of straight, unobstructed pipe is required both upstream and downstream of the FMT-3. Avoid installing the meter immediately downstream of bends, valves, reducers, or tee junctions, as turbulent flow profiles will degrade measurement accuracy. Where straight pipe runs are constrained, contact us to discuss flow conditioning options.
Ready to Measure What Matters?
The FMT-3 delivers the precision flow data your operation needs to reduce energy costs, prevent unplanned downtime, and maintain peak compressed air system performance. UK stock. Expert support. Fast dispatch.
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