Interested in a Product? Call us at 1-800-331-2426 for an updated price and availability. CPI handles many different types of Flow Switches. Call for details 1-800-331-2426.     Vendors Description of Vendors or Products PRINCO  Presence Absence Detectors or Pump Run Dry Protectors Thermal Instrument Company  Thermal Mass Flow Switches K-TEK  Thermal Dispersion Flow Switches