Product Information of Rika water station accessories solution provider for sensor
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RK95-03 Solar power supply system consists of solar panel, solar controller, battery and the inverter (optional). Solar energy is a clean renewable new energy, has no moving parts, no noise, no pollution, high reliability. It can provide reliable power to sensors or weather stations, mainly used for wireless sensor, automatic test station, automatic weather stations and other power supply.
Controller cannot be directly connected to the AC110V/AC220V,the AC must be converted to DC(12V/24V),then connect to the controller.
Single wireless(WIFI,GPRS,Lora, etc.) sensor
RK160-02,RK200-05 or RK400-03
1. Suggest user to ready battery, because the battery is not convenient to transport;
2. The size of the protective box according to the project need to customize;
3. Cable length can be customized.
CONTROLLER DIMENSION & CONNECTION & WORK MODE
The controller has 4 work modes:
1. Light & time control: Mode=1-15: When there is no sunlight start the load, time control shutoff(1-15 hours);
2. Light control Mode=16: When there is no sunlight start the load,when the light appear, shut down load;
3. Normally open Mode=17: Keep the output state 24 hours a day;
4. Manual mode Mode=18:Manual mode.
5. Press the button for 5 s, digital tube start flashing, product into regulating mode, loosen the button, each time you press the button, the number will increase, and the set up, about 5 s digital tube stop flashing, exit mode Settings.
When people think of the relationship between salts and crops, the impression is that salt is harmful to plant growth. However, it must be remembered that whenever we add fertilizer, we are adding salt to the soil. So, when soil salinity is measured, it may be a case of too much or too little. If salinity is too high, the roots cannot bring in water. If salinity is too low, the plants may be starved for nutrients. This is especially critical for indoor operations that use growth media that has little or no natural fertility.For day to day measurements, it is not practical to actually measure the amount of salt in irrigation water or the soil. Fortunately, electrical conductivity (EC) can be used as a proxy for salt content. EC is a measure of how well an aqueous solution conducts electricity. It is influenced by the salt concentration and the temperature. The most commonly used units of measurement for EC are mS/cm, μS/cm, and dS/m, where S stands for Siemens. Because of the impact of temperature, most commercial EC meters automatically compensate their output to account for temperature differences between samples. Some meters will output TDS which stands for Total Dissolved Solids (or Salts). TDS is computed directly from EC using a conversion factor based on the dominant salts present in the sample. A typical conversion would be 1 mS/cm = 640 mg/L.Most soil labs will report the EC from a saturated media extract (SME). The soil is wetted to saturation such that the soil glistens. A vacuum pump is then used to extract a liquid sample for measurement. A similar, but less sophisticated method is the Pour-Through technique. The soil is wetted in a similar way compared to an SME. But, instead of using a vacuum, a small amount of water is added to the top of the container to force a sample out of the bottom. Soil dilutions are an easy way to create a sample for a portable EC meter. The most common dilutions are 1 part soil to 2 parts water or 1 part soil to 5 parts water. Obviously, the interpretation of the EC measurement is dependent on how the sample was prepared. Taking an EC measurement is simply a function of immersing two electrodes in the sample, applying a voltage and measuring the response. This is then converted to conductivity. All EC meters can take measurements in water or soil slurries. There are also meters that have the electrodes configured at the tip of a rugged probe that can be inserted directly into the soil. These probes are useful for sampling directly through a soil profile or for taking near surface measurements in a greenhouse plug tray.Tracking salinity is an essential facet of any nutrient management program. Portable EC meters / probes are a convenient and affordable way to ensure you maintain a healthy root zone.
Dear customers,we will have 5-days of holiday from May 1st to 5th, 2021 for Labour Day.Your understanding will be highly appreciated if our holiday brings you any inconveniences. If any question or support needed, please contact us at email@example.com or firstname.lastname@example.org
Sometimes, after rains, the air feels moist. The water seems to have suspended in the air. However, in certain AC’s you click some buttons and the atmosphere brightens up. How and why does it all happen? Moisture forms up in the air, resulting in humidity. However, the humidity sensor in your AC picks it up and cleans it up for you. Isn’t that wonderful? Let’s take a look at how it does that. A humidity sensor (or hygrometer) senses, measures and reports both moisture and air temperature. The ratio of moisture in the air to the highest amount of moisture at a particular air temperature is called relative humidity. Relative humidity becomes an important factor when looking for comfort. Humidity sensors work by detecting changes that alter electrical currents or temperature in the air. RK330-01 Ambient Temperature Humidity & Pressure Sensor There are three basic types of humidity sensors: ● Capacitive● Resistive● Thermal All three types of sensors monitor minute changes in the atmosphere in order to calculate the humidity in the air. Let us discuss these types in detail: CapacitiveA capacitive humidity sensor measures relative humidity by placing a thin strip of metal oxide between two electrodes. The metal oxide’s electrical capacity changes with the atmosphere’s relative humidity. Weather, commercial and industries are the major application areas. The capacitive type sensors are linear and can measure relative humidity from 0% to 100%. The catch here is a complex circuit and regular calibration. However, for designers this a lesser hassle over precise measurement and hence these dominate atmospheric and process measurements. These are the only types of full-range relative humidity measuring devices down to 0% relative humidity. This low-temperature effect often leads to them being used over wide temperature ranges without active temperature compensation. ResistiveResistive humidity sensors utilize ions in salts to measure the electrical impedance of atoms. As humidity changes, so do the resistance of the electrodes on either side of the salt medium. ThermalTwo thermal sensors conduct electricity based upon the humidity of the surrounding air. One sensor is encased in dry nitrogen while the other measures ambient air. The difference between the two measures the humidity. RK330-01 Temperature Humidity & Pressure Sensor with Radiation Shield Tips on Humidity Sensor workingCoulometric: An electrolyte is formed by absorption of water resulting in a current level which is proportional to the moisture content in the air.Gravimetric: A drying agent is exposed to moist air, resulting in weight gain by the drying agent. The increased weight corresponds to the amount of moisture.Microwave/Infrared: A transmitted signal varies as the humidity increases. The attenuation is an indication of the moisture content in the medium. Some parameters for judgementSo once you know what it is, and how it works, the next step probably would be to check its working. And how do you do that? By working through some of the below-mentioned parameters. AccuracyEvery sensor has its own calibration curve, based on a 9 point system. It basically pitches the pros against the cons of the particular sensor. LinearityIt indicates the voltage deviation from the BFSL value and the measured output voltage value, converted to relative humidity. ReliabilityThe measurements often cause the sensor to fall out of sync. However for a sensor to be useful, it has to provide reliable measurements. RepeatabilityThe measurements from a sensor, have to be so that they don’t drift apart. Repeatability is the measurement of drift among measurements of a single quantity. Response timeTypically, the time is taken by a sensor to rise to 66% (rise time) or fall to 33% (fall time) of maximum output voltage, is known as the response time. Applications of humidity sensors are far and wideThe applications of humidity sensor range far and wide. People with illnesses affected by humidity, monitoring and preventive measure in homes employ humidity sensors. A humidity sensor is also found as part of home heating, ventilating and air conditioning systems (HVAC systems). These are also used in offices, cars, humidors, museums, industrial spaces and greenhouses and are also used in meteorology stations to report and predict the weather. RK330-01 application in greenhouse
Agriculture plays a large role in our society, employing about one third of the world’s available work-force, globally. Cultivated land use has increased four-fold over the past two centuries but has remained fairly constant in the US for the past few decades. Efficient use of this land is essential to achieving key goals of healthy plants and increased productivity and profitability. This can be achieved with the help of more efficient agricultural practices to increase output while minimizing input costs that can range from materials to electricity to labor along with the valuable natural resource of water. Measurement can greatly aid in this overall goal to improve plant health and yields, to preserve valuable resources, to use inputs more effectively, and to minimize the overall impact on the environment. Site-specific measurements in your microclimates offer both immediate and relevant data for your particular operation and are useful aids to help predict, manage, and prompt corrective action, as needed. Readings can be made on an occasional or ongoing basis with either a portable device or a continuous monitor, typically fitted with logging or alert capabilities. Weather monitoring, for example, offers a variety of measurement options that can be tailored for your specific operation including light (see more about Light Measurement) for optimized photosynthesis and overall plant growth and health, leaf wetness and relative humidity which can affect disease pressures, soil moisture to ensure moisture penetration and to schedule irrigation events, along with temperature, wind speed/direction, rainfall and more. Evapotranspiration (see more about evaporation sensor) can be calculated to help schedule irrigation events and to assist with IPM (integrated pest management) decisions. Insect and disease models can forecast risk and assist with pesticide treatment schedules and provide documentation for these decisions. Other common measurements include nutrient levels to evaluate plant, soil, and input levels, detect plant stress early, and time fertilizer applications. pH measurements help confirm the availability of nutrients in your soil as well as the effectiveness of fertilizer solutions, electrical conductivity (see more about monitoring salinity) to evaluate soils, irrigation water and fertilizer solutions to avoid nutrient deficiencies, and compaction to determine soil strength. Operation-specific and microclimate measurements can be very convenient, affordable and, most importantly, can ultimately help you to make informed decisions, optimize field management, and utilize more efficient practices in so many facets of your operations including fertilizer and herbicide/pesticide applications, irrigation schedules, timely reaction to frost risk, harvesting, storage and transportation, and the overall growth and management of healthy crops.