The SRK-DL Series digital mass flow controllers and meters measure ultra-low gas flow rates, starting from just2 sccm (2 ml/min). These precision instruments are ideal for applications requiring highly accurate gas flow control, including:
-Gas chromatography
-Gas analysis systems
-Laboratory research
-Industrial process control
Gas mass flow controllers can be used as:
-Oxygen low flow meters
-
Low-flow air flow meters
-Nitrogen (N2) flow controllers
-Biogas low flow meters
-CO2 ultra-low flow meters
How Digital Mass Flow Controllers Work
The SRK-DL digital mass flow controller consists of:
- A high-precision low-flow sensor
- A laminar flow layering device
- A control valve
- An amplification circuit
Using thermal differential technology, the sensor measures gas flow based on heat transfer changes in a capillary tube. This method ensures accurate mass flow readings (as low as2 sccm) without being affected by temperature or pressure fluctuations.
The system works in a closed-loop control:
1. The sensor detects the flow rate.
2. The signal is compared to the set point.
3. The control valve adjusts to maintain the desired flow.
Key Specifications of Digital Mass Flow Meters & Controllers
-Flow Range: 2 sccm – 30 SLM (including 100 ml/min, 200 sccm, 1 LPM, 5 L/min, 20 SLPM)
-Turndown Ratio:
-50:1 for digital mass flow controllers
-100:1 for digital mass flow meters
-Accuracy: ±1% FS
-Linearity: ±0.5% FS
-Repeatability: ±0.2% FS
-Response Time:
-< 2 sec (mass flow controller)
-< 0.8 sec (
mass flow meter)
-Communication: RS232/485, MODBUS
-Output Signals: 0-5V, 4-20mA, 1-5V
-Power Supply: ±15VDC, 24VDC
-Operating Temperature: 0–50°C
-Max Pressure: 3 MPa / 10 MPa
-Material: Stainless steel
-Process Connections: Φ3, Φ6, 1/8”, 1/4”
Why Choose Our Digital Mass Flow Controllers?
Digital mass flow controllers supplied by silverinstruments.com provide high accuracy, fast response, and reliable performance for ultra-low gas flow applications. Whether you need a low-flow meter for lab use or an industrial digital flow controller, the SRK-DL Series delivers precision and durability.
