Product Description
Atmosphere Engineering Flow Controller FM-3941
Part#: FM-3941
- Measurement Principle: Differential Pressure (No Moving Parts in Flow Path)
- Calibrated Media: Methanol (Liquid)
- Flow Scale: 0 – 75 cc/M (Cubic Centimeters per Minute)
- Flow Accuracy: ±4%
- Repeatability: 2%
- Turndown Ratio: 15–100% (approx. 6.7:1)
- Max Inlet Pressure: 40 PSI (HP Model) / 250 PSI (HPX Model)
- Ambient Temperature: 32°F – 150°F (0°C – 65°C)
- Compliance & Calibration: NFPA 86 Compliant; CQI-9, ISO, NADCAP, and QS Audit-Ready
- Power Supply: Requires 24 VDC input via Pins 1 (+) and 2 (Common)
- Control Input (Setpoint): Accepts a Linear 4–20 mA Control Signal via Pins 5 (+) and 6 (–) to Drive the Integrated Motorized Control Valve
- Flow Feedback Output.: Provides a Linear 4–20 mA Retransmit Signal via Pins 3 (+) and 4 (–)
- Serial Communications: Supports RS-485 via Pins 7 (+) and 8 (–)
- Alarm Output: Includes an Integrated Flow Rate Alarm Output on Pin 9 (SPDT Relay / Flow Switch Functionality)
- Integrated Actuator: Top-mounted Motorized Flow Control Valve with a Dedicated 9-Pin Umbilical Cable Connecting to the Lower Controller Module
- Local Interface: Membrane Keypad with Auto/Manual Mode Toggle, Setup Menu, Set Point Display Button, Integrated Flow Totalizer with Reset, and Status LEDs (Auto, Alarm, Open, Drive)
