ACU20FD Series

The ACU20FD digital mass flow meter comprises a mass flow sensor, a laminar‑flow splitter, a flow‑control regulating valve, and an amplification‑and‑control circuit. It employs digital signal input and output and features short warm‑up time, minimal zero drift, and high reliability.

Category:

Gas Flow Meters and Flow Controllers

Product attachment:

ACU20FD-L High-Precision Mass Flow Controller & Meter.pdf

ACU20FD数字型质量流量计产品手册.pdf

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I. Product Overview

◆ Thermal‑anemometer principle, offering higher accuracy, faster response, and a network port.

◆ Tubular shunt, less prone to blockage

◆ Suitable for various low-pressure and high-pressure pipelines

◆ Short warm-up time, minimal zero drift, and high reliability

◆ Analog inputs/outputs can use secondary instruments or flow computers to control and display flow rates.

ACU20FD High-precision mass flow meter/flow controller The mass flow rate of a gas is measured using the principle of differential‑temperature calorimetry based on capillary heat transfer, which is unaffected by temperature and pressure. The flow signal acquired by the sensor is amplified and compared with a setpoint voltage; the resulting error signal drives a control valve, thereby implementing closed‑loop regulation to maintain the flow through the channel at the desired setpoint.

II. Product Applications

Glass industry	Solar energy	Atmospheric Monitoring	Industrial manufacturing	Petroleum and Petrochemicals
Coal Metallurgy	Gas production and gas distribution	Environmental protection	Various instrumental analyses

III. Product Specifications

Series	ACU20FD
Model number	LC	LM	MC	MM	British Columbia	BM	HC	HM
Measurement range	0–(2, 5, 10…1000) SCCM, 0–(1, 5, 10…30) SLM		0-（30,40,50...300)SLM		0-（300,400,500...3000)SLM		0–(3,000, 4,000…10,000) SLM
Accuracy	±0.5%F.S
Linear	±0.25%F.S
Repeatability	±0.2%F.S
Response time	<0.2s	<0.1s	<0.2s	<0.1s	<0.2s	<0.1s	<0.2s	<0.1s
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	50:1	100:1
Analog quantity	0–5 V, 4–20 mA
Digital quantity	RS232/485, MODBUS protocol
Power supply	24VDC
Communication protocol	Modbus, DeviceNet, Profinet, EtherCAT, Profibus, and others
Operating temperature	0~50℃
Maximum withstand voltage	3 MPa / 10 MPa (to be specified at the time of order)
Electrical connection	DB9 port
Display screen	Touchscreen display
Leak rate	1×10 ^⁻9 Pa m ³/S
Protection rating	IP40
Valve	Valve normally closed	/	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.