22nd of October 2020
Do you know about our range of transmitters?
Now, you can connect most sensors to any Agrónic controller using our range of transmitters.
This year, we have launched new transmitter models on the market, to be able to connect different sensors to any Agrónic model. (Agrónic 2500, Agrónic 4000, Agrónic 5500, Agrónic 7000, Agrónic Bit, Agrónic Radio and Agrónic Monocable).
Furthermore, we have expanded the range of approved sensors.
Transmitters for weather sensors
DPV transmitter (vapor pressure deficit)
It is expressed as a measurement of pressure (kPa), of the difference between the saturation vapor pressure, dew point, and the actual vapor pressure.
High VPD values means that the air has a greater capacity to retain water, thereby stimulating the transfer of water vapor (transpiration), loss of water from the plant, to the point that it can cause the stomata to close, reducing the plant's yield. This situation occurs in conditions of low relative humidity.
Low VPD values mean high levels of water saturation in the air. High levels of relative humidity reduce the plant's transpiration, but at certain values, they are indicators of disease risk due to phytopathogens.
This indicator can be used to prevent diseases, determine if there is a risk of condensation in any part on the system (free water), irrigation requirements, and/or the need to increase humidity in the environment in enclosed spaces. In these enclosures, it is recommended to use the model with a ventilated relative humidity probe.
Transmitters for plant and fruit sensors
The transmitter converts the voltage output of the dendrometer sensors and transforms it into a standard 4-20 mA signal for reading on the controller.
It lets you measure the expansion and contraction of a plant organism, expressed in micrometers, as an indicator of its growth according to its contribution of nutrients and irrigation.
It is useful for knowing the growth trend of crops for stem, trunk, or fruit measurements, thereby verifying their caliber.
Transmitters for soil sensors
The transmitter measures the electrical resistance (Ω) between two wire mesh circuits connected by a porous material and converts it to a standard 4-20 mA signal for reading on the controller, expressed in Centibars. It includes a temperature sensor to compensate for the vapor provided by the Watermark sensor.
The value increases as the water suction by the plant increases and the soil humidity decreases. And its value decreases when more water is available to the plant.
It is used to measure the humidity of the soil where the crop is. It is very userful for knowing the real supply of the irrigation, letting us know the real water retention capacity of the soil. According to the texture of each soil, its value can be previously calibrated in stress-straim curve and available water depletion tables.
The transmitter converts the signal, which the sensors measure based on changes in the dielectric constant of the soil, into a standard 4-20 mA signal for reading on the controller, expressed in % of water volume in the soil in relation to its volumetric content (m3water/m3soil).
They serve to express the values of soil water retention between the field capacity thresholds and the permanent wilting point, according to the soil’s texture.
They are very useful for seeing changes in the water retained in the soil and its variability according to the application of irrigation, rainfall, or absorption by the crop.
Furthermore, it also allows for reading the dielectric LWS sensors to measure moisture on the leaf's surface.
From the transmitter itserlf, by means of a Module Reader, you can configure the variety of soil and the value format that the sensor must deliver.
Useful for measuring crops sensitive to salinity, on hydroponic growing substrates, or for using lance-type multi-sensors that transmit via SDI-12 bus.
Transmitters for soil sensors
Pulsed signal transmitter
Useful in facilities that inject fertilizers using analog signals to regulate through dosage variators.
Complements Agrónic 2500 and Agrónic 5500 controllers that do not have direct analog 4-20 mA outputs, instead using pulses.
The transmitter converts the distance measurement provided by the ultrasound sensor to a standard 4-20 mA output for reading on the controller, expressed in mm of water column.
The sensor provides distance measurements from 500mm to 9000mm. The 4-20 mA signal can be adjusted to the desired distance measurement range.
Useful for measuring reserve at all times, whether in tanks, pools, or reservoirs, and managing their filling according to their level and/or for managing liquid fertilizer tanks.
pH and EC transmitter
Double transmitter for reading one sensor for pH and another for electrical conductivity (EC) with 2 or 4 electrodes in the irrigation water.
It adapts the signals that come from the sensors and generates an output in standard 4-20 mA values to read on the controller. The values must be calibrated with the standard solutions for each probe.
They are needed to read the pH and EC values, which are recorded continuously and allow the controller to regulate the injection of fertilizer and acid according to the Set-point that is pre-configured for each crop. Useful in hydroponic irrigation installations with Agrónic 5500 and 7000 controllers.