CalFlo™ CFNF1 AC Thermal Mass Air, FLocorp-Flow Switch

The CalFlo series of calorimetric flow switches offer units with several features including temperature & flow, compact relay control, strobe alert, adjustable flow, compact airflow, inline airflow, and more. The wide variety of options available enable us to provide the right unit for your specific application. If you need help selecting the correct flow switch, our team is happy to assist in the selection process.

This industrial purpose flow switch is a great choice for monitoring a variety of air or gaseous applications. The 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 an LED indication of flow. 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.

Features and Benefits

• Compact airflow 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	Ultra dura (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