ACU10FC Series

The ACU10FC differential-pressure mass flow controller employs a differential-pressure-based mass‑flow measurement principle that exhibits no thermal drift and zero response lag, enabling simultaneous display and output of instantaneous flow, cumulative flow, pressure, temperature, and other parameters. When control functionality is required, it can be equipped with an electromagnetic proportional control valve and built-in PID regulation. Unlike thermal mass flow meters, the ACU10FC incurs no additional “specific heat capacity” error when using gas conversion factors; thus, even if the measured gas differs from the calibration gas used at the factory, measurement accuracy remains unaffected.

Category:

Gas Flow Meters and Flow Controllers

Product attachment:

ACU10FC Differential Pressure Gas Mass Flow Controller.pdf

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I. Product Overview

◆ No thermal drift; negligible temperature and time drift; long-term stability of 0.1% F.S./year.

◆ Accuracy of 1.0%; the measurement range can be set via keypad within a 100:1 span, with no calibration required.

◆ Instantaneous and cumulative flow, pressure, and temperature can be displayed simultaneously.

◆ No warm-up required; no response lag during measurement.

◆ Built-in with 30 gas conversion coefficients; negligible additional error in specific heat capacity, with no impact on accuracy.

The ACU10FC differential-pressure mass flow controller employs a differential-pressure-based mass‑flow measurement principle that exhibits no thermal drift and zero response lag, enabling simultaneous display and output of instantaneous flow, cumulative flow, pressure, temperature, and other parameters. When control functionality is required, it can be equipped with a solenoid‑proportional control valve and built‑in PID regulation. Unlike thermal mass flow meters, the ACU10FC does not introduce additional “specific heat capacity” errors when gas conversion factors are applied. Consequently, even if the measured gas differs from the calibration gas used at the factory, measurement accuracy remains unaffected.

II. Product Applications

The ACU10FC series differential-pressure mass flow controllers are widely used across various industries, including process manufacturing, food analysis, and analytical testing and metrology. Their multi-variable measurement capabilities and 50:1 adjustable turndown ratio enable a single ACU10FC unit to replace the functionality of multiple devices. With 1% accuracy, 1% repeatability, and a control response time of less than 200 milliseconds, they ensure reliable operation of process gases.

III. Product Specifications

Series	ACU10FC
Model number	LC	LM	MC	MM	BC	BM
Range of measurement	0–(2, 5, 10…1000) SCCM, 0–(1, 5, 10…30) SLM		0-（30,40,50...300)SLM		0-（300,400,500...3000)SLM
Accuracy	±1.0%F.S
Repeatability	±1%F.S
Zero Drift & Full-Scale Drift	0.02% F.S/ °C/Atm
Working differential pressure	0.1–0.5 MPa (to be specified at the time of order)
Range ratio	50:1	100:1	50:1	100:1	50:1	100:1
Typical response time	200 milliseconds (adjustable)
Analog quantity	0–5 V, 4–20 mA
Digital quantity	RS232/485, MODBUS protocol
Power supply	24VDC
Operating temperature	+10~+50℃
Operating pressure drop	<0.01 MPa
Work stress	<1 MPa
Electrical connection	DB15 port
Protection rating	IP40
Leak rate	1×10-9 Pa·m³/s
Valve	Valve normally closed	/	Valve normally closed	/	Valve normally closed	/
Base material	Stainless steel
Sealing material	Fluororubber, nitrile rubber, EPDM, perfluoroether
Body thread	G3/8 internal thread				G1/2 internal thread
Joint	Ferrules, ferrule fittings, quick-connect couplings, VCR fittings, flanges, etc.