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Sanitizer alert system

  • US 4,142,539 A
  • Filed: 09/21/1977
  • Issued: 03/06/1979
  • Est. Priority Date: 09/21/1977
  • Status: Expired due to Term
First Claim
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1. A sanitizer alert system in combination with a warewasher such as a dishwashing machine, having wash and rinse systems for cleaning food ware items placed therein, a source of chemical sanitizing agent, a conduit having an outlet end connecting the source of chemical sanitizing agent to an outlet end in the warewasher rinse system, means providing delivery periods for the chemical sanitizing agent, and means actuated during each of the delivery periods for moving the sanitizing agent through the conduit from the inlet end thereof to the outlet end to deliver sanitizing agent to the warewasher rinse system, the sanitizer alert system monitoring and verifying delivery of the chemical sanitizing agent to the rinse system of the warewasher during each of successive delivery periods, and comprising:

  • (a) a delivery indicator having at least two switchable states including a first state for indicating proper delivery of the sanitizing agent and a second state for indicating improper delivery,(b) means for activating said delivery indicator during each of the delivery periods,(c) detecting means for detecting the absence and the presence of the sanitizing agent at a predetermined location in the conduit,(d) means connected to said detecting means for switching said delivery indicator to said second state if the presence of sanitizing agent is detected at said predetermined conduit location at the beginning of a delivery period, and(e) means connected to said detecting means for switching said delivery indicator to said second state at the end of a predetermined time period upon detecting the continuing absence of sanitizing agent at said predetermined conduit location during said predetermined time period.

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