Gas Calibration Equipment and Dynamic Gas Distribution Instrument Offering Pollution Source Simulation and Gas-Liquid Mixed Gas Distribution
The MR-series Pollution Source Simulation Device (Portable Dynamic Gas Distribution Instrument) is a high-precision, intelligent gas preparation system developed by Shenzhen National Instrument Technology Co., Ltd. It features a 7-inch capacitive touchscreen and built-in proprietary control software that enables gas-liquid mixed gas distribution.
The gas section relies on a thermal imported high-accuracy mass flow controller to drive multiple gas channels at different ratios, so gas concentrations can be produced dynamically with no warm-up and immediate start-up. The liquid section uses a high-precision syringe pump and a micro-range injection needle, with universal Modbus485 digital signals ensuring signal accuracy.
The instrument is applied to test linearity, accuracy, repeatability and other technical indicators of gas analyzers or gas detection devices. It is an essential testing tool for verification, maintenance and repair work, and also serves as a fixed-concentration gas generator.
- Supports gas-liquid mixed gas distribution.
- Allows a second stage of two-channel interference gas re-mixing after the initial mixing.
- Flow control based on closed-loop fuzzy control technology for fast response and accurate regulation.
- Large 7-inch capacitive LCD with Chinese display for simple and convenient operation.
- Self-developed control system that automatically manages the whole distribution process.
| Parameter | Specification |
|---|---|
| Flow Accuracy | ≤ ±1% F.S |
| Flow Linearity | ±0.3% F.S |
| Flow Repeatability | ±0.2% F.S |
| Response Time | ≤ 50 ms (distribution) |
| Single Range Ratio | 200:1 / 100:1 / 50:1 |
| Maximum Mixing Ratio | 4000:1 / 2000:1 / 1000:1 / 500:1 |
| Dilution Gas Flow Range | 0-10 SLM / 0-5 SLM / 0-1 SLM / 0-500 SCCM / 0-10 SCCM (selectable) |
| Parameter | Specification |
|---|---|
| Input Pressure | (0.2–11) MPa |
| Working Differential Pressure | 0.05–0.3 MPa |
| Maximum System Pressure | < 1 MPa |
| Vaporization Chamber Temperature | 0–350 °C |
| Temperature Control Accuracy | ≤ 0.1 °C |
| Operating Ambient Temperature | 5–45 °C |
| Relative Humidity | < 80% RH |
| Parameter | Specification |
|---|---|
| Power Supply | AC 220 V, 50±0.5 Hz |
| Maximum Power | 300 W (heating to 350 °C); solenoid valve max. 24 W |
| Dimensions (L×H×D) | 483 mm × 300 mm × 452 mm |
| Weight | 32 kg |
The device uses the static-volume method of gas preparation: the target liquid (reagent or solvent) is injected through an injection port into a sealed container (the mixing chamber) while dilution gas is introduced. After thorough mixing, the temperature and pressure of the mixed gas are measured. The concentration of the standard gas is then calculated from the injected amount, chamber volume, temperature and pressure.
Key formulas:
Liquid density: g/ml
Syringe pump feed speed: ml/min (based on liquid volume)
Mass feed rate of the syringe pump = density × feed speed, i.e. g/ml × ml/min = g/min
Output concentration = mass feed rate ÷ dilution flow, i.e. g/min ÷ m³/min = g/m³
The instrument is widely used in factories, research institutes and laboratories for the calibration and testing of gas analyzers, gas detectors and gas sensors, as well as for the preparation of standard gas samples.
Shenzhen National Instrument Technology Co., Ltd.
Manufacturer of the MR-series Pollution Source Simulation Device
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