Sonda de Perfil GroPoint de Stevens

    Sonda multi-segmentada de perfil de humedad del suelo

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    La Sonda de Perfil GroPoint de Stevens proporciona la medición efectiva de humedad del suelo a través de múltiples profundidades utilizando una sola sonda. La tecnología TDT (Transmisión del Dominio del Tiempo) proporciona mediciones volumétricas del suelo (porcentaje de agua en el suelo) en múltiples profundidades. La Sonda de Perfil GroPoint de Stevens se puede desplegar en zonas de riego para proporcionar un mejor entendimiento del movimiento del agua a través del suelo mediante el rastreo preciso de cambios relativos en la humedad del suelo a través de la columna del suelo.

    El diseño elegante y ligero permite la fácil instalación vertical con mínima interrupción del suelo utilizando una varilla piloto y un martillo deslizante. El GroPoint de Perfil toma mediciones del promedio volumétrico de la humedad del suelo a través de cada segmento, con cada segmento de aproximadamente 6 pulgadas (15 cm). Las opciones de longitud del GroPoint de Perfil son de 2 a 8 segmentos.

    Una solución precisa y rentable para el perfilado del suelo

    Eliminates need for multiple sensors and cabling systems.

    Installs quickly and easily without excavating.

    One SDI-12 address is used to read all segments, providing for simplified installations. Optional RS-485 output.

    Moisture readings can be user-calibrated with 3rd-order polynomials to meet custom requirements.

    Low power requirements—suitable for remote, autonomous applications.

    Patented TDT5 technology for scientific-grade accuracy and excellent long-term stability of measurements.

    Fully potted electronics for excellent durability.

    Simplifique la medición de la humedad del suelo de diferentes profundidades.

    Esta sonda individual GroPoint de Perfil instalada sin excavación es equivalente a 4 sondas. Medirá la humedad del suelo de 4 diferentes profundidades.

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    Primer Segmento

    Medición del contenido volumétrico promedio de suelos hasta 15cm (5.9”)

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    Segundo Segmento

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    Tercer Segmento

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    Cuarto Segmento

    Analice

    el movimiento

    del agua

    a través

    del suelo.

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    Puede abrir un hoyo del tamaño exacto requerido para la sonda utilizando un martillo deslizante adjunto a una varilla piloto robusta. Resultando en una instalación rápida y fácil, y con mínima interrupción del suelo, incrementando la precisión de la medición.

    Slide hammer
    Pilot rod

    2

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    5

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    Elija el número de segmentos adecuados para su aplicación.

    (Tamaños personalizados también disponibles)
    You can also choose from three different configurations for temperature sensors, depending on your requirements. You can configure it with no temperature sensors if you only require moisture measurement. The standard configuration places temperature sensors every 1 or 2 segments. The scientific configuration has roughly double the temperature sensors of the standard configuration.
    GroPoint profile no temperature sensors

    4-segments, no temperature sensors

    GroPoint profile standard temperature sensor configuration

    4-segments, standard temperature sensor configuration

    GroPoint profile scientific temperature sensor configuration

    4-segments, scientific temperature sensor configuration

    TDT5

    GroPoint™ sensors are based on the field-proven Time Domain Transmission (TDT) method of reliably measuring soil moisture, which is a refined version of Time Domain Reflectometry (TDR). TDT-based sensors do not need to be calibrated to each type of soil they will be buried in to deliver excellent accuracy and stability, however we do calibrate for 3 specific soil types for even greater accuracy.

    TDT5 enhances TDT in 5 key ways:

    1. Extreme accuracy

    A patented design weaves the antenna through the circuit board 20 times per centimetre, and much like a coiled spring the effective length of the antenna is 5 times the physical length it consumes. It's like having a 75cm long antenna in a single 15cm sensor. A larger antenna increases the resolution of each sample, allowing more noise to be filtered out, improving the accuracy to ±1% (between 8% to 42% VMC).

    2. Reduced manufacturing costs

    Unlike other moisture probes, Gropoint sensors do not have separate components for electronics and bulky metal antennas. By integrating the antenna and all electronics into the same circuit board (possible thanks to the patented antenna design), manufacturing costs are dramatically reduced.

    3. Repeatable accuracy

    Each time a measurement is taken, GroPoint sends 400,000 pulses through the sensing element to generate data for the measurement, then employs advanced filtering to eliminate outlying readings (noise) before averaging the data and sending the measurement as SDI-12 output. This ensures that the same extreme accuracy (±1%) is obtained each and every time moisture is measured.

    4. Low power consumption

    Despite 400,000 pulses for each measurement, the total time to take the measurement is less than 100 ms. This means that power consumption is minimal, and that permits GroPoint sensors to be operated for many months with small 9V battery-powered data loggers.

    5. Maximum durability

    Unlike typical sensors, the antenna is not exposed to the soil, so there's nothing to bend or break. The entire sensor circuit board is sealed in epoxy then encased in a sealed polycarbonate housing.

    Especificaciones Técnicas

    Humedad

    Rango de humedad

    7% a 42% contenido de humedad volumetrica

    Precisión

    ±1%

    Repetibilidad

    < 0.2%

    Temperatura

    Rango de medición

    -20°C a +70°C

    Temperatura de Almacenamiento

    -40°C a +85°C

    Precisión

    ±0.5 °C

    Sensores

    1 termistor por 2 segmentos

    General

    Salida

    SDI-12 V1.3 (RS485 Opcional)

    Conexión

    Terminales móviles (opcion de 4 pines, clasificación ambiental de conector IP66/IP68)

    Voltaje de entrada

    6 a 14 VDC máx. 18 VDC

    Corriente de entrada

    15 mA a 100 mA máx - dependiendo del numero de segmentos. El ciclo de trabajo es de 100ms por segmento

    Consumo de corriente

    Inactivo: <0.5mA

    Stevens Water Monitoring Systems, Inc. | Portland, OR, USA

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