摘要:
A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure and can include a fluid flow controller. In some embodiments, the fluid flow controller is configured to permit flow of fuel to a first passageway and to direct a first fuel to a first oxygen depletion sensor line when the controller is in a first position and permit the flow of fuel to a second passageway and to direct a second fuel to a second oxygen depletion sensor line when the controller is in a second position.
摘要:
A method for determining a concentration of an analyte is disclosed. The method includes applying a potential excitation to a fluid sample containing an analyte and determining if a current decay curve associated with the fluid sample has entered an analyte depletion stage. The method also includes measuring a plurality of current values associated with the fluid sample during the analyte depletion stage and calculating an analyte concentration based on at least one of the plurality of current values.
摘要:
This invention is a method for determining a concentration of an analyte. The steps include applying a potential excitation to a fluid sample containing an analyte, and measuring a current associated with the potential excitation at a plurality of time-points. The method also includes calculating an analyte concentration based on the measured current and a calibration curve, wherein the calibration curve is selected from a plurality of calibration curves and each calibration curve is associated with a time-segment selected from a plurality of time-segments.
摘要:
A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a combustion chamber. The fluid flow controller can selectively permit flow of a first fuel to either the first fuel line or flow of a second fuel to the second fuel line. The first fuel line can be in communication with a first oxygen depletion sensor orifice and the second fuel line can be in communication with a second oxygen depletion sensor orifice.
摘要:
In certain embodiments, an apparatus includes an oxygen depletion sensor (ODS) includes a thermocouple, a first nozzle configured to direct heat from combustion of a first gas, liquid, or combination thereof to the thermocouple, a second nozzle configured to direct heat from combustion of a second gas, liquid, or combination thereof to the thermocouple, and a first igniter.
摘要:
A dual fuel heating source can have a dual entry valve unit with a main body at least partially defining a certain flow paths or channels therethrough. The dual entry valve can have first and second inlets and first and second outlets. The dual fuel heating source may also include a pressure regulator, an exit valve, a control valve and/or a manifold connected to the dual entry valve unit.
摘要:
A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a combustion chamber. The fluid flow controller can selectively permit flow of a first fuel to either the first fuel line or flow of a second fuel to the second fuel line. The first fuel line can be in communication with a first oxygen depletion sensor orifice and the second fuel line can be in communication with a second oxygen depletion sensor orifice.
摘要:
A method for determining a concentration of an analyte is disclosed. The method includes applying a potential excitation to a fluid sample containing an analyte and determining if a current decay curve associated with the fluid sample has entered an analyte depletion stage. The method also includes measuring a plurality of current values associated with the fluid sample during the analyte depletion stage and calculating an analyte concentration based on at least one of the plurality of current values.
摘要:
In certain embodiments, an apparatus includes a burner. The apparatus can also include an intake valve that includes an input for receiving fuel from either a first fuel source at a first pressure or a second fuel source at a second pressure. The intake valve can include a first output for directing fuel received from the first fuel source and a second output for directing fuel received from the second fuel source. The intake valve can include an actuator configured to permit fluid communication between the input and the first output or between the input and the second output. The apparatus can include a pressure regulator that can include a first inlet for receiving fuel from the first output of the intake valve and a second inlet for receiving fuel from the second output of the intake valve. The regulator can also include an outlet for directing fuel from the pressure regulator toward the burner.
摘要:
In certain embodiments, an apparatus includes a control valve for regulating fuel flow. The apparatus can include a burner and a valve assembly. In some embodiments, the valve assembly includes a housing, which can define a first fuel input for receiving a first fuel from a first fuel source and a second fuel input for receiving a second fuel from a second fuel source. The housing can define a first fuel output for directing fuel toward the control valve, and can define a third fuel input for receiving a portion of either the first fuel or the second fuel from the control valve. The housing can define a first egress flow path and a second egress flow path, each for directing fuel to the burner. In certain embodiments, the apparatus includes a valve body configured to selectively permit fluid communication between the first and second inputs and the output and between the third input and the egress flow paths.