Metal seal
The ACU20FD digital mass flow meter comprises a mass flow sensor, a laminar flow element, a flow‑control regulating valve, and an amplification‑and‑control circuit. It employs digital signal input and output and features short warm‑up time, low zero drift, and high reliability.
Overview
Applications
Specifications
Dimensions
Software
◆ 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.
The ACU20FD high-precision mass flow meter/controller measures gas mass flow using the capillary‑based differential‑temperature calorimetric method, which is unaffected by temperature and pressure. It amplifies the flow signal detected by the sensor, compares it with a setpoint voltage, and uses the resulting error to drive a control valve, thereby maintaining closed-loop regulation of the flow rate through the channel at the desired value.
| Glass industry | Solar energy | Atmospheric Monitoring | Industrial manufacturing | Petroleum and Petrochemicals |
| Coal Metallurgy | Gas production and gas distribution | Environmental protection | Various instrumental analyses | |
| Product model | ACU20FD-LC |
| Range of measurement | 2SCCM～30SLM |
| 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 | ±0.2%F.S |
| Response time | Flow meter: <0.1 s |
| Flow controller: <0.2s | |
| Digital quantity | RS232/485, Modbus protocol, Profibus protocol, DeviceNet protocol |
| Analog quantity | 0–5 V, 4–20 mA, 1–5 V |
| Power supply | ±15 VDC, 24 VDC |
| Operating temperature | 0–50°C |
| Work stress | Operating pressure drop: <0.01 MPa |
| Maximum withstand voltage | 3MPa/10MPa |
| Electrical connection | DB9 port |
| Leak rate | 1×10-10 Pa·m³/s |
| Temperature coefficient | ±0.025%F.S/℃ |
| Base material | Stainless steel |
| Sealing material | Metal seal |
| Joint | 1/4VCR |
Mass Flow Measurement and Control System V5.0
