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Dwyer DMF-41409 | Digital Mass Flow Controller | 0-5 LPM N2, 1/4" Fitting, RS-485
Ranged 0-5 LPM for nitrogen at 21°C and 760 mm Hg, the Dwyer DMF-41409 digital mass flow controller programs, logs and regulates gas flow using a straight tube sensor and restrictor flow element.
- 1/4" compression fitting; 0-5 LPM full scale
- Control functions include flow set point, totalising and auto zero; automatic balancing circuit for near drift-free zero and span
- Two dry contacts for switching valves or pumps; outputs: linear 0-5 or 0-10 VDC; RS-485 link
- ±1% FS accuracy incl. linearity; ±0.15% FS repeatability; rated 500 psig (34.5 bar)
- Specifications
- Features
- Downloads
| Part Number | DMF-41409 |
| Brand | Dwyer |
| Flow Range | 0-5 LPM (N2 at 21°C, 760 mm Hg) |
| Process Connection | 1/4" compression |
| Accuracy | ±1% FS (15-25°C, 0.7-4 bar) |
| Repeatability | ±0.15% FS |
| Response Time | 0.6-1.0 s to ±2% of set point |
| Output | 0-5 VDC; 0-10 VDC |
| Interface | RS-485 |
| Max Pressure | 500 psig (34.5 bar) |
| Operating Temperature | 41 to 122°F (5 to 50°C) |
| Power Supply | ±15 VDC, 13.5 W max |
| Wetted Materials | 316 SS, 416 SS, fluoroelastomer O-rings |
| Approvals | CE |
- The Series DMF controllers allow users to program various control functions, including flow set point, totalizer, stop totalizer, totalize from preset flow, stop and preset total, auto zero, and more.
- Designed with straight tube sensors and restrictor flow elements, the controllers ensure laminar gas flow, leading to accurate and repeatable flow rate measurements.
- The Series DMF controllers are unaffected by variations in temperature and pressure, ensuring consistent performance and reliable results across different operating conditions.
- The auto zero feature utilizes an automatic balancing circuit to virtually eliminate drift of zero and span, maintaining accuracy over time without manual intervention.
- Each Series DMF controller is equipped with two dry contact closures, which can be used to operate pumps, valves, or other process equipment, enhancing system integration and control capabilities.
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