Quick couplings

Flow Meter & Monitor

The Nitto Kohki Flow Meter & Monitor range covers flow measurement and monitoring instruments for pneumatic systems, made of brass with FKM seals (FMC types) or without seal (FM types). The range includes the compact FM-03B, the FMC-30-3F and FMC-30-4F monitors for nominal sizes 3 and 4, plus accessories such as FlowVane and Stopper for the FMC-30 system. These instruments allow monitoring and documentation of air consumption and leakage in compressed-air installations.

5 items
1 manufacturer
Net prices plus VAT

Buying guide

How to choose Flow Meter & Monitor

What matters when choosing: properties, comparison and typical applications.

Technical features

⚙ Brass construction - suitable for dry and oil-mist compressed air

✦ FKM seals (FMC types) - enhanced chemical resistance of the measuring head

✓ Nominal sizes 3 and 4 (FMC-30) - FMC-30-3F and FMC-30-4F for different line diameters

⬡ FlowVane and Stopper accessories - extensions for the FMC-30 measurement system

↕ Compact FM-03B - small-format flow meter for restricted installation spaces

Type overview

Type	Function	Nominal size	Material	Seal
FM-03B	Compact flow meter	-	Brass	-
FMC-30-3F	Flow monitor	3	Brass	FKM
FMC-30-4F	Flow monitor	4	Brass	FKM
FlowVane for FMC-30	Vane wheel accessory	-	-	-
Stopper for FMC-30	Stop accessory	-	-	-

Typical applications

Typical applications: Leakage monitoring and energy efficiency analysis in stationary compressed-air networks, air consumption measurement at individual machines and tools, quality assurance in pneumatic manufacturing processes, and consumption documentation for energy management systems to ISO 50001.

FAQ

Frequently asked questions about Flow Meter & Monitor

What are pneumatic flow meter monitors and where are they used in industrial applications?

Pneumatic flow meter monitors are precision instrumentation devices that measure and display real-time fluid flow rates in compressed air systems, incorporating quick-connect couplings for rapid system integration. These devices serve critical roles in manufacturing automation, quality control processes, and pneumatic conveying systems where accurate flow measurement ensures consistent production output. Industries including automotive assembly, food packaging, pharmaceutical manufacturing, and semiconductor fabrication rely on these monitors to maintain ISO 9001 quality standards and optimize compressed air consumption efficiency.

What technical specifications should I consider when selecting a Nitto Kohki flow meter monitor?

Critical selection criteria for Nitto Kohki flow meter monitors include operating pressure range typically spanning 0.1 to 1.0 MPa, port diameter compatibility with standard pneumatic fittings from 1/8 inch to 1/2 inch, and material construction such as brass bodies with FKM seals for chemical resistance. The FMC-30 series models feature brass construction with FKM elastomer seals rated for temperatures from -10°C to +80°C, while flow measurement accuracy typically maintains ±3% of full scale reading. Media compatibility extends to compressed air, inert gases, and non-corrosive fluids with particle filtration requirements of 40 micrometers or finer to prevent internal mechanism damage.

Which international standards and certifications apply to pneumatic flow meter monitors?

Pneumatic flow meter monitors must comply with ISO 8573 compressed air quality standards for contamination levels and ISO 4414 pneumatic fluid power general rules for safe operation up to 1.6 MPa working pressure. European installations require conformity with EN 983 safety requirements for fluid power systems and components, while ATEX Directive 2014/34/EU certification becomes mandatory for explosive atmosphere applications in chemical or grain handling facilities. Additional compliance with IEC 61010 electrical safety standards applies to models incorporating electronic displays or signal outputs, ensuring protection against electrical hazards during maintenance operations.

What are the differences between FMC-30-3F and FMC-30-4F flow meter monitor variants?

The primary distinction between Nitto Kohki FMC-30-3F and FMC-30-4F variants lies in their port configuration and flow capacity ratings, with the 4F model typically featuring larger internal passages for higher volume applications up to 400 L/min compared to the 3F model's 300 L/min maximum flow rate. Both models utilize identical brass construction with FKM seal materials for chemical compatibility, but differ in their quick-connect coupling geometry to accommodate varying pneumatic line sizes and pressure drop requirements. The numerical designation directly correlates to maximum flow measurement capability, allowing system designers to select appropriate capacity margins for their specific compressed air consumption profiles.

What installation requirements and connection types are needed for pneumatic flow meter monitors?

Installation requires straight pipe runs of minimum 5 times the pipe diameter upstream and 2 times downstream from the flow meter monitor to ensure accurate measurement, with ambient temperature stability between 0°C and 50°C for optimal performance. Nitto Kohki quick-connect couplings utilize standard pneumatic thread connections including G1/8, G1/4, and G3/8 BSP parallel threads, with push-to-connect variants available for rapid system integration without thread sealant. Proper installation orientation maintains the flow direction arrow alignment with system flow, while pressure relief valves upstream prevent damage from pressure surges exceeding the monitor's 1.0 MPa maximum rating during system startup or shutdown cycles.

What safety ratings and operating conditions apply to pneumatic flow meter monitors?

Pneumatic flow meter monitors typically carry IP65 ingress protection rating against dust and water jets, enabling installation in harsh industrial environments with exposure to cutting fluids or wash-down procedures. Operating temperature range extends from -10°C to +80°C for brass construction models with FKM seals, while maximum working pressure reaches 1.0 MPa with 4:1 safety factor burst pressure testing per ISO 4414 standards. Electrical versions incorporate Class II double insulation rated for 24V DC operation with intrinsic safety barriers required for hazardous area installations, ensuring compliance with ATEX Zone 1 explosive atmosphere requirements in chemical processing applications.

What maintenance intervals and service life expectations apply to pneumatic flow meter monitors?

Routine maintenance intervals for pneumatic flow meter monitors require visual inspection every 3 months for seal integrity and flow indicator functionality, with complete disassembly and seal replacement recommended annually in high-duty cycle applications exceeding 8 hours daily operation. Service life typically extends 5 to 7 years under normal industrial conditions with proper filtration maintaining compressed air quality per ISO 8573 Class 3 standards, while harsh environments with temperature cycling or chemical exposure may reduce operational life to 3 years. Calibration verification against certified reference flow meters should occur every 12 months to maintain measurement accuracy within ±3% tolerance, with replacement indicators including erratic flow readings, visible seal deterioration, or internal contamination affecting measurement stability.