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Dwyer Series AFS Adjustable Flow Switch

For Oils, Water and Gases, Explosion Proof, Infinite Adjustments
Low Cost, Reliable and Compact. Hermetically Sealed Contacts.

The Series AFS Adjustable Flow Switch is externally adjustable and is ideal for protecting machine tools from coolant flow failure, protecting bearings from loss of lubricant or assuring proper air flow. The Series AFS offers an infinite number of flow settings at pressures up to 1000 psig, with low pressure drop and precise repeatability. The AFS is housed in either brass or stainless steel and can be used with water, compatible liquids, oils, and gases.

See Dimensions

Service: Liquids, water, gases, and oils.
Wetted Materials: Brass and 316 SS.
Temperature Limits: -20 to 300°F (-29 to 149°C). Pressure Limit: 1000 psi (68 bar).
Accuracy: ±10% of setpoint.
Repeatability: ±1% maximum deviation.
Switch Type: SPDT.
Electrical Rating: 20 VA.
Electrical Connections: 18 AWG, 24", Polymeric lead wires.
Process Connection: 1/2" female NPT ports.
Mounting Orientation: Any.
Setpoint Adjustment: 0.5 to 20 GPM.
Required Filtration: 50 microns or better.
Weight: 2 lb 11 oz (1.22 kg).
Popular Models
Model Number Media Electrical Connection Housing
 AFS-131  Oil  Wire leads  Brass
 AFS-141  Water  Wire leads  Brass
 AFS-151  Liquids  Wire leads  SS
 AFS-231  Gases  Wire leads  Brass
 AFS-251  Gases  Wire leads  SS
 AFS-132  Oil  Conduit  Brass
 AFS-142  Water  Conduit  Brass
 AFS-152  Liquids  Conduit  SS
 AFS-232  Gases  Conduit  Brass
 AFS-252  Gases  Conduit  SS