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641-12-LED
Flow Transmitter, 12" Probe, LED, 4mA to 20mA, 12 VDC, 35 VDC, ± 3%
Image is for illustrative purposes only. Please refer to product description.
| Manufacturer | DWYER |
|---|---|
| Manufacturer Part No | 641-12-LEDCopy |
| Order Code | 4288729 |
| Product Range | 641 Series |
| Your Part Number | |
| Technical Datasheet |
No Longer Manufactured
Product Information
| Manufacturer | DWYER |
|---|---|
| Manufacturer Part No | 641-12-LEDCopy |
| Order Code | 4288729 |
| Product Range | 641 Series |
| Technical Datasheet | |
| Flow Rate Max | - |
| Flow Rate Min | - |
| Flow Transmitter Output | 4mA to 20mA |
| Supply Voltage Min | 12VDC |
| Supply Voltage Max | 35VDC |
| Accuracy | ± 3% |
| Port Style | 1/2" MNPT |
| Media Type | Argon, Carbon Dioxide, Clean Dry Air, Helium, Nitrogen, Non-Corrosive Dry Gas |
| Process Connection Size | 1/2" |
| Process Connection Type | NPT Male |
| Pipe Size | - |
| Sensor Mounting | Pipe Mount |
| Operating Temperature Min | 0°C |
| Operating Temperature Max | 60°C |
| Product Range | 641 Series |
| SVHC | No SVHC (04-Feb-2026) |
| Pressure Max | 100psi |
| Supply Voltage DC Min | 12V |
Product Overview
641-12-LED is a series 641 air velocity transmitter with LED display. It is ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. Typical applications include exhaust stack flow monitoring, HVAC air velocity measurements, clean room fresh air supply, air control in drying processes, fan supply and exhaust tracking and ensuring proper lab hood exhaust flow rates.
- 12" probe length
- Field selectable ranges from 250FPM (1.25m/s) to 15,000FPM (75m/s) suit any application
- Easy push button set-up reduces installation time
- Compact housing minimizes installation footprint
- 4-20mA output for use with most building management systems
- Digital filter for signal damping
- Selectable 0.5 to 15 (seconds) output filter
- 1/2˝ male NPT process connection and screw terminal electrical connection
- Maximum 300mA current consumption and 600 ohm loop resistance
- Unit not position sensitive, probe must be aligned with airflow
Technical Specifications
| Flow Rate Max | - |
|---|---|
| Flow Transmitter Output | 4mA to 20mA |
| Supply Voltage Max | 35VDC |
| Port Style | 1/2" MNPT |
| Process Connection Size | 1/2" |
| Pipe Size | - |
| Operating Temperature Min | 0°C |
| Product Range | 641 Series |
| Pressure Max | 100psi |
| Flow Rate Min | - |
|---|---|
| Supply Voltage Min | 12VDC |
| Accuracy | ± 3% |
| Media Type | Argon, Carbon Dioxide, Clean Dry Air, Helium, Nitrogen, Non-Corrosive Dry Gas |
| Process Connection Type | NPT Male |
| Sensor Mounting | Pipe Mount |
| Operating Temperature Max | 60°C |
| SVHC | No SVHC (04-Feb-2026) |
| Supply Voltage DC Min | 12V |
Technical Docs (1)
Legislation and Environmental
| Country of Origin: Country in which last significant manufacturing process was carried outCountry of Origin: | United States Country in which last significant manufacturing process was carried out |
|---|---|
| Tariff No: | 90268020 |
| US ECCN: | EAR99 |
| EU ECCN: | NLR |
| RoHS Compliant: | Yes RoHS |
| RoHS Phthalates Compliant: | Yes RoHS |
| SVHC: | No SVHC (04-Feb-2026) |
| Download Product Compliance Certificate | Product Compliance Certificate |
| Weight (kg): | .521631 |