FLocorp CalFlo™ CFNF1 AC Thermal Mass Air Flow Switch features solid-state switching and is extremely reliable even under the harshest environmental conditions. The CFNF1 features a repeatable alarm, an adjustable set-point from 3 to 32 feet per second, and LED indication of flow.
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| FLocorp CalFlo™ CFNF1 AC Thermal Mass Air Flow Switch |
The short housing is intended for use in pipe sizes ½” to 1 ½” in diameter and the long housing is recommended for pipe sizes 2” and up. Typical applications include air conditioning, ventilation, air filter monitoring, extraction fans, blowers, damper regulators and energy conservation systems.
FLocorp CalFlo™ CFNF1 AC Features and Benefits
- Compact air flow switch with rugged Stainless Steel or plastic Ultradur construction
- High accuracy with NO moving parts
- Available in 110 VAC or 220 VAC power supply
- Set-point adjustable between 3 fps and 32 fps
- Temperature independent
- Easy installation with mounting flange (included)
Specifications
| Service | Compatible Gasses |
| Switching Range | 3 to 32 fps (1 to 10 mps) |
| Factory set-point | 10 fps (3 mps) |
| Pressure | CFNF1-_-U: 15 psi (1 bar) CFNF1-_-S: 150 psi (10 bar) |
| Hysteresis | ≤ 30% |
| Switching Delay | Min. 3 s/ Max. 100 s (depends on set-point adjustment) |
| Temperature Drift | < 0.5% / K |
| Supply Voltage | CFNF1-1: 110 VAC CFNF1-2: 220 VAC |
| Voltage Tolerance | ± 10% |
| Switching Current | 200 mA max. |
| Repeatability | < 3% |
| Consumption | Approx. 1W |
| Starting Override Time | Max. 90 s |
Output | Thyristor Normally Open (closed with flow), Thyristor Normally Closed (open with flow) |
| Display | LED for ON or OFF state |
| Process Temperature | F: -4º to 160º C: -20º to 70º |
| Ambient Temperature | F: -4º to 160º C: -20º to 70º |
| Enclosure Rating | NEMA 4 (IP64) |
| Housing Material | Ultradur (PBTP) or Stainless Steel |
| Sensor Material | Ceramic with Over Glaze |
| Weight | CFNF1-_-U: 0.3 lbs (130 g) CFNF1-_-S: 0.4 lbs (200 g) without nut |
| Cable | |
| Cable Jacket Material | Oilflex |
| Cable Length | 6.5’ (2m) |
Download Datasheet: CalFlo™ CFNF1 AC Thermal Mass Air Flow Switch
Ref: Flo-corp.com
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