High-Precision Mass Flow Controller (Metal Seal)
The ACU20FD digital mass flow meter consists of a mass flow sensor, laminar flow separator, flow controller regulating valve, and amplification control circuit. It features digital signal input and output, offering advantages such as short preheating time, minimal zero drift, and high reliability.
Overview
Applications
Specifications
Dimensions
Software
◆ Thermal principle, offering higher accuracy and faster response, with Ethernet port
◆ Tubular shunt, resistant to clogging
◆ 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 via secondary instruments or flow computers.
The ACU20FD high-precision mass flow meter/flow controller uses the capillary heat transfer method—measuring the temperature difference before and after heat exchange—to accurately determine the mass flow rate of gases, independent of temperature and pressure variations. The flow signal detected by the sensor is first amplified, then compared with a preset voltage. The resulting difference is used to precisely control and adjust the regulating valve, enabling closed-loop regulation of the flow rate through the channel until it matches the setpoint value.
| Glass Industry | Solar energy | Atmospheric Monitoring | Industrial Production | Petroleum and Petrochemicals |
| Coal Metallurgy | Gas Generation and Gas Distribution | Environmental protection | Various instrumental analyses | |
| Product Model | ACU20FD-LC |
| Measurement range | 2 SCCM to 30 SLM |
| Measurement and Control Range | Flow measurement range ratio: 100:1; Controller range ratio: 50:1 |
| Accuracy | ±0.5%F.S |
| Linear | ±0.5%F.S |
| Repeatability accuracy | ±0.2%F.S |
| Response Time | Flow meter: <0.1s |
| Flow controller: <0.2s | |
| Digital quantity | RS232/485, Modbus Protocol, Profibus Protocol, DeviceNet Protocol |
| Analog quantity | 0–5V, 4–20mA, 1–5V |
| Power Supply | ±15VDC, 24VDC |
| Operating Temperature | 0～50℃ |
| Work stress | Work pressure drop: <0.01 MPa |
| Maximum Withstand Voltage | 3MPa/10MPa |
| Electrical Connection | DB9 Port |
| Leakage rate | 1 × 10⁻¹⁰ Pa·m³/s |
| Temperature coefficient | ±0.025%F.S/℃ |
| Base material | Stainless steel |
| Sealing material | Metal Seal |
| Connector | 1/4VCR |
Quality Flow Measurement and Control System V5.0
