1. Gas
Specify the gas name, or mixture composition and proportions. Choose a controller to regulate flow, or a meter to measure flow only.
- 01
Gas conditionsGas
Gas typeFlow rangePressure range - 02
ApplicationApplication
Equipment / PLCDesktop useComputerMultiple units - 03
Power & fittingsPower & fittings
Gas fittingsPower supplySpecial needs
01
Operating conditions
2. Actual flow range
Provide minimum, typical and maximum operating flow with units. Convert the maximum to nitrogen-equivalent flow before selecting a range.
3. Pressure range
Specify inlet and outlet pressure ranges separately, including gauge or absolute pressure. Include vacuum, backpressure or fluctuations where applicable.
Select the series using nitrogen-equivalent flow
Nitrogen-equivalent flow = actual gas flow ÷ gas conversion factor
Example: 9 SLPM methane ÷ 0.719 ≈ 12.52 SLPM nitrogen-equivalent. Select the 803 series.
Read the conversion guide →0–10 SLPM802 series
10–50 SLPM803 series
50–200 SLPM805 series
200–1000 SLPM807 series
02
Application
4. How will it be used?
After choosing the flow range, match the configuration to the control system and operation needs.
| Application | Suggested configuration |
|---|---|
| Inside equipment, controlled by a PLC or DAQ card | 0–5V / 4–20mA analog interfaces: FL-xxx-A, or a digital model with suitable analog interfaces. |
| Multiple instruments | RS485 / Modbus RTU for centralized reading and control. |
| Single-channel desktop operation with occasional adjustments | FL-xxx-A + FL-100 for local setting and display. |
| Computer-based setting and reading | FL-xxx-D with a DB9 communication cable, RS485-to-USB module and application control software. |
| Direct desktop operation plus computer connection | CM-xxxLD with built-in keys and LCD, plus computer connectivity. |
| Local operation at the equipment panel | CM-xxxLD; confirm installation and interface requirements. |
-A: analog interfaces. -D: RS485, Modbus RTU, 0–5V / 4–20mA. CM: integrated display. Meter models add -M to the corresponding model and provide measurement only.
03
Power & fittings
5. Gas fittings
Specify fitting type and tube size, such as 6mm or 1/4″ double-ferrule fittings, or 8mm hose fittings. Multiple sizes are available; tubing is not included in the standard configuration.
6. Power supply
Product supply: 9–36VDC, typically 24VDC. Use the equipment’s existing 24V supply or a separate power adapter. An FL-100 combination uses its matched instrument power arrangement.
7. Special requirements
Specify accuracy, materials, installation space, multi-channel integration, gas mixing or custom software requirements.
Ready to select?
Gas, actual flow range, inlet/outlet pressure, application, fittings, power and special requirements.