Abstract: A sensor is configured to sense a parameter of an aqueous liquid. The sensor has an analog output port configured to provide an analog signal indicative of a sensed parameter, and a calibration memory device storing individual digital information indicative of a calibration of the sensor. A digital output port provides a digital signal indicative of the digital information. A treatment system and method is matched to the sensor.

Abstract: A mobile device reads a test strip to determine a chemical condition of a liquid or a user inputs a treatment plan into the mobile device. The mobile device transmits the determined chemical condition or the input treatment plan to a liquid treatment system which treats the fluid in response to the determined chemical condition or the input treatment plan.

Abstract: A mobile device reads a test strip to determine a chemical condition of a fluid. The mobile device transmits the determined chemical condition to a fluid treatment system which treats the fluid in response to the determined chemical condition.

Abstract: A sensor is configured to sense a parameter of an aqueous liquid. The sensor has an analog output port configured to provide an analog signal indicative of a sensed parameter, and a calibration memory device storing individual digital information indicative of a calibration of the sensor. A digital output port provides a digital signal indicative of the digital information. A treatment system and method is matched to the sensor.

Abstract: A mobile device reads a test strip to determine a chemical condition of a liquid or a user inputs a treatment plan into the mobile device. The mobile device transmits the determined chemical condition or the input treatment plan to a liquid treatment system which treats the fluid in response to the determined chemical condition or the input treatment plan.

Abstract: A sensor is configured to sense a parameter of an aqueous liquid. The sensor has an analog output port configured to provide an analog signal indicative of a sensed parameter, and a calibration memory device storing individual digital information indicative of a calibration of the sensor. A digital output port provides a digital signal indicative of the digital information. A treatment system and method is matched to the sensor.

Abstract: A motorized exercise apparatus for use with a power source comprising an exercise apparatus having a power supply configured to be connected to the power source. An electronically commutated motor is configured to drive the exercise apparatus. A controller is configured to connect a power supply to the motor to selectively energize the motor to drive the exercise apparatus and including an emergency stop feature. The controller selectively actuates the motor and disables activation of the motor when the emergency stop feature is actuated. An additional motor driven by the apparatus is configured to cause a dynamic braking action to slow the apparatus when the power source is disabled or when the emergency feature is actuated.

Abstract: A mobile device reads a test strip to determine a chemical condition of a fluid. The mobile device transmits the determined chemical condition to a fluid treatment system which treats the fluid in response to the determined chemical condition.

Abstract: A sensor is configured to sense a parameter of an aqueous liquid. The sensor has an analog output port configured to provide an analog signal indicative of a sensed parameter, and a calibration memory device storing individual digital information indicative of a calibration of the sensor. A digital output port provides a digital signal indicative of the digital information. A treatment system and method is matched to the sensor.

Abstract: Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

Abstract: Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

Abstract: Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

Abstract: Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

Abstract: Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

Abstract: Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

Abstract: A galvanic probe comprises a sensor electrode and a reference electrode. The sensor electrode has an exposed surface that comprises a noble metal or antimony or bismuth, and, optionally, an oxide or hydroxide thereof. The reference electrode is spaced apart from the sensor electrode and has an exposed surface that comprises zinc or magnesium, and, optionally, an oxide or hydroxide thereof. The probe may be incorporated into a device for controlling the pH and/or ORP of a fluid in a vessel to a desired pH and/or ORP level, incorporated into methods for measuring the pH and/or ORP of a fluid, or used as a galvanic cell.

Abstract: A galvanic probe comprises a sensor electrode and a reference electrode. The sensor electrode has an exposed surface that comprises a noble metal or antimony or bismuth, and, optionally, an oxide or hydroxide thereof. The reference electrode is spaced apart from the sensor electrode and has an exposed surface that comprises zinc or magnesium, and, optionally, an oxide or hydroxide thereof. The probe may be incorporated into a device for controlling the pH and/or ORP of a fluid in a vessel to a desired pH and/or ORP level, incorporated into methods for measuring the pH and/or ORP of a fluid, or used as a galvanic cell.

Abstract: A heart rate monitor for use with road bikes and other exercise equipment to calculate the user's heart rate while exercising. The monitor includes only two, first and second, electrodes and a signal processor mounted on the handle bars in a position that contacts the user when the bike is in normal use. The first electrode is disposed at a first location on the handle bars for contacting the user and for sensing the user's heart rate. The first electrode produces a first sensed signal representative of the user's heart rate. The second electrode is disposed at a second location on the handle bars for contacting the user and for sensing the user's heart rate. The second electrode produces a second sensed signal representative of the user's heart rate. The signal processor produces a difference signal indicative of a difference between the first and second sensed signals.

Abstract: A heart rate monitor for use with exercise equipment to calculate the user's heart rate while exercising. The monitor includes only two, first and second, electrodes and a signal processor. The first electrode is disposed at a first location on the exercise equipment for contacting the user and for sensing the user's heart rate. The first electrode produces a first sensed signal representative of the user's heart rate. The second electrode is disposed at a second location on the exercise equipment for contacting the user and for sensing the user's heart rate. The second electrode produces a second sensed signal representative of the user's heart rate. The signal processor produces a difference signal indicative of a difference between the first and second sensed signals.