Sight Flow Switches offer SPDT or pulse output.

Press Release Summary:

Series SF2 protects electronic equipment from coolant flow failure. Units have brass unibody, 1-piece composite rotor and ceramic shaft. Temperature range is -20 to 212°F and pressure limit is 200 psig at 70°F. Model SF2-1 features SPDT relay output. Set points are adjustable over specified flow range. Model SF2-2 provides 4.5-24 Vdc pulse output that is proportional to rate of flow and compatible with most digital logic families.

Original Press Release:

New! Sight Flow Switch with SPDT or Pulse Output!

Dwyer Instruments, Inc. is proud to announce the release of the Series SF2 Sight Flow Switches. These flow switches are ideal for protecting expensive electronic equipment from coolant flow failure on medical equipment, semiconductor processing equipment, x-ray and other high power tubes, and robotic welding equipment.

The brass unibody construction, one-piece composite rotor, and ceramic shaft deliver durability with broader chemical, temperature, and pressure capabilities. The Series SF2 features a temperature limit of -20 to 212°F (-29 to 100°C), a pressure limit of 200 psig @70°F.

The model SF2-1 has a SPDT relay output. Set points are fully adjustable over the specified flow range. The Model SF2-2 features a pulse output proportional to the rate of flow. The 4.5 to 24 VDC pulse output is compatible with most digital logic families.

Dwyer Instrujments, Inc. produces a wide variety of temperature products. For complete information contact Dwyer Instruments, Inc., P.O. Box 373, Michigan City, IN, 46361. Phone: (219) 879-8000; Fax (219) 872-9057. Internet address:;
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