MGC640 Insertion Thermal Gas Mass Flow Meter
Summary:
The insertion-type thermal gas mass flow meter is a gas flow measurement instrument designed based on the principle of thermal diffusion (constant-temperature-difference operation), comprising a sensor and a signal analysis and control unit. The product features an insertion mounting configuration, making it suitable for various circular pipelines and supporting both horizontal and vertical installation. It comes standard with an RS485 communication interface (MODBUS RTU protocol) and a 4–20 mA analog output, with optional pulse output and alarm output. Measurement does not require temperature or pressure compensation; it directly outputs mass flow with an accuracy of ±1% and a response time of ≤100 ms. The operating medium temperature range is 0–200°C, making it ideal for monitoring the flow of compressed air, natural gas, carbon dioxide, biogas, nitrogen, oxygen, and other gases in applications such as industrial gas management, boiler fuel-gas metering, aeration control in wastewater treatment, and gas-leak detection.
Keywords:
Category:
The insertion-type thermal gas mass flow meter is a gas flow measurement instrument designed based on the principle of thermal diffusion (constant-temperature-difference operation), comprising a sensor and a signal analysis and control unit. The product features an insertion mounting configuration, making it suitable for various circular pipelines and supporting both horizontal and vertical installation. It comes standard with an RS485 communication interface (MODBUS RTU protocol) and a 4–20 mA analog output, with optional pulse output and alarm output. Measurement does not require temperature or pressure compensation; it directly outputs mass flow with an accuracy of ±1% and a response time of ≤100 ms. The operating medium temperature range is 0–200°C, making it ideal for monitoring the flow of compressed air, natural gas, carbon dioxide, biogas, nitrogen, oxygen, and other gases in applications such as industrial gas management, boiler fuel-gas metering, aeration control in wastewater treatment, and gas-leak detection.
Detailed introduction
Product Features
- Suitable for gas measurement over a wide range and with large pipe diameters.
- Capable of measuring air, nitrogen, oxygen, argon, carbon dioxide, hydrogen, helium, as well as biogas and aeration in wastewater treatment plants.
- Rapid response during measurement ≤100 ms, with 1% accuracy.
Technical Specifications
| Product Name | MGC640 Thermal Gas Mass Flow Meter |
| Accuracy | ±2% of the reading (within the calibrated range of 10% to 100%) Full-scale accuracy of ±0.5% (within 10% of the calibrated range) |
| Repeatability | ±0.2% of full scale |
| Temperature coefficient | Within the user-specified range of ±50°F, the effect per degree Fahrenheit is ±0.02% of the reading. Under user-specified conditions, within the range of ±50°F to 100°F, the effect per °F is ±0.03% of the reading. Within the user-specified tolerance of ±25°C, the effect per °C is ±0.04% of the reading. Under user-specified conditions, within the temperature range of ±25°C to 50°C, the effect per °C is ±0.06% of the reading. |
| Pressure coefficient | The user-specified pressure deviation within ±50 psig (3.4 barg) is negligible. Higher pressures require specialized calibration. |
| Response time | 63% of the final speed value in 1 second |
| Gas pressure | Gases: -40°F to 250°F (-10°C to 120°C); Optional range: -40°F to 450°F (-10°C to 200°C); 1/4-inch and 1/12-inch case sizes are not available. Environment: -5°F to 120°F (-20°C to 50°C) |
| Leak-proof function | Maximum 1×10⁻⁴ cc/sec (helium) |
| Power Supply Requirements | 18 to 30 VDC, maximum current of 625 mA |
| Output signal | 4–20 mA output proportional to the mass flow rate, with a maximum impedance of 700 Ω (when powered by a separate supply); RS232 output (non-isolated), RS485 output (isolated), MODBUS RTU protocol |
| Display | 4×8 digital backlit LCD display with Chinese and English menus The variable can be adjusted via on-board buttons, magnetic switches, or host computer software. |
| Accumulator | The eight-digit number 99,999,999 indicates that the user can reset it to zero and set a specific value. |
| Software | The host computer software (Windows-based) requires a minimum of 8 MB of RAM; 16 MB is recommended. RS232 Communication interface, or use a USB-to-RS232 converter. |
| Interface Materials | 316L stainless steel, 40-size fluid piping, and carbon steel case are available in certain sizes. |
| Housing | Enclosures for hazardous areas are available in IP67 or NEMA 4X (IP65) ratings, both constructed from powder-coated aluminum die casting. |
| Electrical Interface | Two 3/4-inch NPT threaded… hazardous-location enclosure (IP67) A 1/2-inch NPT threaded… NEMA 4X enclosure (IP65) |
| Installation (optional) | ANSI 1-inch 150-pound flange 3/4-inch cable lock nut with 1-inch NPT external thread |
Industry Applications
| Industrial Gas Management | Food industry | Power industry | Environmental protection industry |
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