ACU20FD Series

The ACU20FD digital mass flow meter consists of a mass flow sensor, a laminar flow separator, a flow controller with a regulating valve, and an amplification 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

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I. Product Overview

◆ Thermal principle, higher accuracy, faster response, with network port

◆ Tubular shunt, not easy to clog

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

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

◆ Analog input/output can be controlled and displayed by secondary instruments or flow computers to monitor flow rates.

ACU20FD High-precision mass flow meter/flow controller The mass flow rate of a gas is measured using the principle of differential calorimetry based on the temperature difference before and after capillary heat transfer, a method that is unaffected by temperature and pressure variations. The flow signal detected by the sensor is amplified and then compared with a set voltage. The resulting difference is used to drive a control valve, thereby implementing closed-loop control to ensure that the flow rate through the channel matches the set value.

II. Product Applications

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

III. Product Parameters

Series	ACU20FD
Model	LC	LM	MC	MM	BC	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-(3000, 4000...10000) SLM
Accuracy	±0.5% F.S.
Linear	±0.5% 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 (specified when ordering)
Range ratio	50:1	100:1	50:1	100:1	50:1	100:1	50:1	100:1
Analog quantity	0–5V, 4–20mA
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 (specify when ordering)
Electrical connection	DB9 hole
Display screen	Touchscreen display
Leak rate	1 × 10⁻⁹ Pa·m³/s
Protection level	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	Card holders, towers, quick-connect fittings, VCRs, flanges, and more