CalFlo™ CFNF1 AC Thermal Mass Air  FLocorp Flow Switch

CalFlo™ CFNF1 AC Thermal Mass Air FLocorp Flow Switch

The CalFlo series of calorimetric flow switches offers units with several features including temperature & flow, compact relay control, strobe alert, adjustable flow, compact air flow, inline air flow 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.

CalFlo™ CFNF1 AC Thermal Mass Air Flow Switch
CalFlo™ CFNF1 AC Thermal Mass Air Flow Switch

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 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 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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