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AFS Pressure Switches (30-3000 Pa)
Product Details

The AFS are general purpose airflow proving switches designed for HVAC, detection of blocked filters and fan suction, air flow monitoring in ducts, pipes, tunnels, and other energy management applications. It may be used to sense positive, negative or differential air pressure.

The plated housing contain a diaphragm, a calibration spring and a snap-acting switch. The sample connections located on each side of the diaphragm accept a 0.25" OD tubing via the integral compression and nut. An enclosure cover guards against accidental contact with the live switch terminal screws and the set point adjusting screw. The enclosure cover will accept a 0.5" conduit connection. The AFS-460 has a reset button located on the top surface of the enclosure cover.


Model

AFS-222(LF35-1)

AFS-262(LF35-2)

AFS-460

Medium

Air

Air

Air

Mounting Position

Diaphragm in any vertical plane

Diaphragm in any vertical plane

Diaphragm in any vertical plane

Field Adjustable Range

0.05±0.02" W.C. to 12.0" W.C.

0.05±0.02" W.C. to 2.0" W.C.

0.40±0.06" W.C. to 12.0" W.C.

Switch Differential

Progressive, increasing from approximately 0.02" W.C at minimum set point, to approximately 0.8" W.C. at maximum set point.

Progressive, increasing from approximately 0.02" W.C at minimum set point, to approximately 0.1" W.C. at maximum set point.

None, Mannual Reset

Maximum Pressure

0.5psi (0.03bar)

0.5psi (0.03bar)

0.5psi (0.03bar)

Operating Temperature Range

-40℃-82℃

-40℃-82℃

-40℃-82℃

Electrical Rating

300 VA pilot duty at 115-277VAC, 10amp, non-inductive, 277VAC, 60Hz.

300 VA pilot duty at 115-277VAC, 10amp, non-inductive, 277VAC, 60Hz.

300 VA pilot duty at 115-277VAC, 10amp, non-inductive, 277VAC, 60Hz.

Electrical Connections

Screw top terminals with cup washers

Screw top terminals with cup washers

Screw top terminals with cup washers

Sample Line Connections

Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing.

Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing.

Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing.

Contact Arrangement

SPDT

SPDT

2 SPST-NC (manual reset)

Conversion: 1mbar=100Pa 1"W.C.=249Pa

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