MFM / GAS FLOW
Product appearance varies by configuration.
Mass Flow Meter (MFM)
KM800 Series
The KM800 Series gas mass flow meter combines a compact design with fast response, high resolution, and repeatable measurement. It is suitable for laboratory gas measurement and environmental monitoring. See the model specifications for flow range, accuracy, and operating conditions.
- Range
- 0~20 sccm to 0~1000 slm (nitrogen equivalent)
- Accuracy
- ±1.0%F.S. (<50slm) / ±1.5%F.S. (50-100slm) / ±2.0%F.S. (>100slm)
- Turndown Ratio
- 100:1
- Response Time
- ≤10ms
Configuration and suitability confirmed for your application.
Basic Parameters
| Media Requirement | Clean, dry, non-corrosive gas |
| Media Type | Air, nitrogen, oxygen, carbon dioxide, helium, hydrogen, methane, argon, etc. |
| Flow Range¹ (Nitrogen Equivalent) | (0~20, 50, 100, 200, 500) sccm (0~1, 5, 10, 50, 100, 200, 500, 800, 1000) slm Other ranges customizable, please contact us |
| Accuracy | 1.0% F.S. <50slm 1.5% F.S. ≤100slm and ≥50slm 2.0% F.S. >100slm |
| Turndown Ratio | 100:1 |
| Response Time³ | ≤10ms |
| Flow Pressure Loss | ≤100Pa (range dependent) |
| Repeatability | ≤±0.2% F.S. |
| Resolution | 0.01 sccm, ≤100 sccm 0.1 sccm, ≤1 slm and >100 sccm 1 sccm, ≤5 slm and >1 slm 0.01 slm, >5 slm |
| Max Pressure Rating | 2MPa |
Environmental Conditions
| Operating Temperature | 0~50℃ |
| Operating Humidity | 10%~90% R.H. (no condensation) |
| Working Pressure⁴ | 0~1MPa |
| Storage Temperature | -20~85℃ |
Electrical Parameters
| Power Supply | DC 8~24V |
| Power Consumption | ≤250mW |
| Display | LCD screen (100ms refresh) or host software |
Communication Interface
| Interface Type | 7-pin aviation connector |
| Analog Control | 4~20mA (optional) |
| Digital Control | RS485 |
Digital Signal (RS485)
| Interface Type | 7-pin aviation connector |
| Baud Rate | 9600 (default), 14400, 19200, 38400, 56000, 57600, 115200 Configurable via command or host software |
| Protocol | Modbus-RTU |
| Device Address | 1 (default) ~250 Configurable via command or host software |
Mechanical Parameters
| Connector Type | Ferrule: 8mm, 12mm, 1/4inch, 1/8inch Others available |
| Wetted Materials | Aluminum alloy, fluororubber, silica |
| Body Material | Base: Aviation aluminum alloy (316L stainless steel available for bulk orders) Housing: Aluminum alloy |
| Seal Material | FKM fluororubber |
| Weight | 0.30kg |
Measurement conditions & notes
- Unless otherwise specified, this product is calibrated under the following conditions: nitrogen, 25℃, 2.5 bar differential pressure (inlet 3.5 barA, outlet 1 barA), horizontal position.
- It is recommended to install a straight pipe section of appropriate size at the inlet, otherwise accuracy deviation may occur.
- It is recommended to use the largest possible fittings at the inlet and outlet to avoid additional pressure loss.
- The shown ranges are available for nitrogen.
- Response time refers to time to reach ±2% of setpoint.
- Working pressure refers to differential pressure between inlet and outlet.
Confirm fluid compatibility, materials, connections, and available configuration with our team before ordering.
