The present invention has to do with a method and system for a high precision electronic psychrometer operable at low temperatures and high humidity environments. The electronic psychrometer includes thermistors for measuring wet and dry bulb temperatures and a wicked cage surrounding one of the thermistors. The wicking action of the wicked cage is controlled by an evaporation controller in conjunction with the wick's physical parameters. The electronic psychrometer determines relative humidity and provides a readout display and/or a control signal.

The present invention has to do with a method and system for a high precision electronic psychrometer operable at low temperatures and high humidity environments. The electronic psychrometer includes thermistors for measuring wet and dry bulb temperatures and a wicked cage surrounding one of the thermistors. The wicking action of the wicked cage is controlled by an evaporation controller in conjunction with the wick's physical parameters. The electronic psychrometer determines relative humidity and provides a readout display and/or a control signal.

The purpose of the present invention is to reduce a load of preventing dew condensation, and to provide a highly reliable humidity detection device. In order to achieve the purpose, this humidity detection device is provided with: a humidity sensor having a humidity detection unit and a temperature detection unit; a heating resistor that heats the humidity sensor; and a heating control unit that controls a heating temperature of the heating resistor. The humidity detection device is characterized in having a target temperature storage unit that stores target temperatures of the heating resistor, said target temperatures having been determined corresponding to temperatures and humidities.

A humidity measuring device is equipped with a measurement unit including a temperature sensing element, a humidity sensing element, a casing including an accommodating section in which the measurement unit is accommodated, and a display unit including a display device which is fixed to the casing. A coupling tube connected in the middle between tube portions through which the gas flows enables gas to flow between one of the tube portions and another of the tube portions. The coupling tube includes an orifice, a filter is mounted in the coupling tube, and the casing includes a first tube and a second tube to connect the coupling tube and the accommodating section, and to enable the gas to flow between the coupling tube and the accommodating section.

A humidity measuring device is equipped with a temperature and humidity measurement unit including a temperature sensing element that measures temperature and a humidity sensing element that measures humidity, a casing having an accommodating section in which the temperature and humidity measurement unit is accommodated, and a supply tube that supplies a gas at a measurement location into the accommodating section, and a display unit having a display device, and which is fixed to the casing. The display unit further includes a display control unit that controls the display device to thereby cause the display device to display at least one of the humidity of the gas measured by the humidity sensing element, or a dew point temperature of the gas calculated based on the temperature of the gas measured by the temperature sensing element, and the humidity of the gas measured by the humidity sensing element.

A temperature and humidity measuring device and a wet bulb supply module are provided. The temperature and humidity measuring device includes a measuring module and the wet bulb supply module. The measuring module has a first and a second measuring portion for acquiring first and second temperature information, respectively. The wet bulb supply module includes a container component, a position limiting component, and a wet bulb component. The container component has a first opening, a second opening, and an accommodating space that is in spatial communication with the first and the second opening. The position limiting component has a gripping portion. The wet bulb supply module is configured to allow the measuring module to extend into the accommodating space through the second opening, is configured to use the gripping portion to grip the measuring module, and is configured cover the second measuring portion with the wet bulb component.

A temperature and humidity measuring device and a wet bulb supply module are provided. The temperature and humidity measuring device includes a measuring module and the wet bulb supply module. The measuring module has a first and a second measuring portion for acquiring first and second temperature information, respectively. The wet bulb supply module includes a container component, a position limiting component, and a wet bulb component. The container component has a first opening, a second opening, and an accommodating space that is in spatial communication with the first and the second opening. The position limiting component has a gripping portion. The wet bulb supply module is configured to allow the measuring module to extend into the accommodating space through the second opening, is configured to use the gripping portion to grip the measuring module, and is configured cover the second measuring portion with the wet bulb component.

A method for identifying a state of a stream of refrigerant includes capturing a plurality of sample images of a sensor for sensing the stream of the refrigerant, processing each of the plurality of sample images to identify a first color indicative of a dry refrigerant and a second color indicative of a wet refrigerant. The method also includes calculating an aggregated volume of each of the first color and the second color, wherein the aggregated volumes of the first color and the second color indicate a dry refrigerant or the wet refrigerant respectively in the stream. Further, the method includes comparing an aggregated volume ratio of the first color and the second color with a first threshold ratio and a second threshold ratio and determining the state as one of a dry state, a transient state, and a wet state based on the comparison.

A method for identifying a state of a stream of refrigerant includes capturing a plurality of sample images of a sensor for sensing the stream of the refrigerant, processing each of the plurality of sample images to identify a first color indicative of a dry refrigerant and a second color indicative of a wet refrigerant. The method also includes calculating an aggregated volume of each of the first color and the second color, wherein the aggregated volumes of the first color and the second color indicate a dry refrigerant or the wet refrigerant respectively in the stream. Further, the method includes comparing an aggregated volume ratio of the first color and the second color with a first threshold ratio and a second threshold ratio and determining the state as one of a dry state, a transient state, and a wet state based on the comparison.