Imagine you need exact gas flow data in a busy lab and the meter you use drifts, causing costly errors. The Delta Electronics DFM2002A1-C8 Gas Flow Meter measures air or nitrogen from 2 to 200 liters per minute with digital RS-485 output. It is built for clean, dry gases and gives you real-time numbers on a clear LCD. If you struggle with inaccurate readings or slow response, this device solves that problem.
Delta Electronics DFM2002A1-C8 Gas Flow Meter 2 to 200 L/min Air N2 RS485 Output
When gas flow is off, processes such as semiconductor etching, medical device sterilization, or HVAC testing can fail. The lack of precise measurement leads to waste, re-work, and downtime. This meter removes the guesswork. Its thermopile sensor stays stable across 0-0.75 MPa and 0-50 C, while the 3 % full-scale accuracy keeps your data trustworthy. The RS-485 digital output lets you link directly to PLCs or SCADA systems, so you can monitor and log flow without manual recording. In short, it turns a vague reading into a reliable control point.
Key Features
- Measurement range 2-200 L/min for air and nitrogen.
- Thermopile sensor provides stable performance over pressure and temperature.
- Digital RS-485 (D+/D-) and NPN outputs for flexible wiring.
- Selectable response times from 50 ms to 2 s.
- 2-color LCD displays peak (red) and total (green) values.
- Built-in zero adjustment and button lock to prevent accidental changes.
- Energy-saving mode reduces power when flow is idle.
- Standard 2 m cable included for quick installation.
- Operating pressure up to 0.75 MPa, durable to 1 MPa.
- Input voltage 24 VDC 10 % non-isolated.
Specifications
| Manufacturer |
Delta Electronics |
| Model |
DFM2002A1-C8 |
| Product Type |
Gas Flow Meter (Thermopile technology) |
| Output Type |
RS-485 (digital), NPN |
| Measurement Range |
2–200 L/min (dry, clean gas) |
| Measurable Gas |
Air, N₂ |
| Measurement Accuracy |
±3% F.S. (entire process) |
| Pressure-Related Inaccuracy |
±5% F.S. (0–0.75 MPa), based on 0.35 MPa |
| Temperature-Related Inaccuracy |
±5% F.S. (0°C–50°C), based on 25°C |
| Input Voltage |
24 VDC ±10% (non-isolated) |
| Power Consumption |
Max. 0.96 W |
| Operating Pressure |
0–0.75 MPa |
| Maximum Durable Pressure |
1 MPa |
| Gas Nozzle Size |
C8 – Ø8 mm fast connector |
| Response Time |
50 ms, 100 ms, 500 ms, 1 s, 2 s (selectable) |
| Display |
LCD, 2-color (red/green), 4 digits (peak), 8 digits (accumulated) |
| Display Resolution |
1 L/min |
| Digital Output |
RS-485 (D+/D−), NPN |
| I/O Terminals |
Power + I/O terminals (A side), RS-485 terminals (B side) |
| Functions |
Peak and accumulated volume display, reverse display, zero adjustment, button lockup,
energy-saving mode, delay decision
|
| Cable |
Standard 2 m cable included |
| Operating Temperature |
0°C–50°C |
| Storage Temperature |
-10°C–60°C |
| Operating Humidity |
35–85% RH (non-condensing) |
