Temperature broad leaf (LAT-B3 and LAT-B4)

    The Leaf-to-Air-Temperature sensors (LAT) LAT-B3 and LAT-B4 are precise dual-probe sensors designed for continuous measurements of leaf surface and ambient air temperatures. Two high-precision micro-thermistor probes simultaneously measure leaf temperature (Tleaf) and air temperature (Tair). Each sensor is individually calibrated by matching the two probes, ensuring high accuracy in determining the leaf-to-air temperature difference (ΔTleaf-air), which is calculated from the concurrent temperature measurements.

    These devices are suitable for long-term applications under outdoor conditions. Due to their extremely low power consumption, Ecomatik LAT sensors are ideal for battery-powered solutions, e.g., in IoT applications.

    The LAT-B3 is mounted on broad leaves using an ultra-light-weight magnetic clamp mechanism. The LAT-B4 offers both magnetic mounting and an alternative ultra-light-weight carbon rod clamp mechanism, making it especially suitable for thicker leaves with a leaf thickness greater than 0.7 mm.

    Advantages

    • Direct, continuous and highly accurate measurement of blade temperature (Tleaf), air temperature (Tair), and leaf-air temperature difference (ΔTleaf-to-air)
    • Small, lightweight and flexible sensors to minimize loading on and damage to the measurement object
    • Easy installation
    • Maximum stability against wind and rain; specifically designed for field conditions
    • Customizable production possible, e.g. for specific leaf/needle size
    • Extremely low power consumption, suitable for IoT application
    • Sensor signal in mV, measurable with most common data loggers

    Limits

    • Not suitable for leaves with a length of less than 1.4 mm and a width of smaller than 0.8 or larger than 20 cm and not suitable for leaves with a thickness of > 0.7 mm

    Technical Data

    Sensor model name

    Leaf temperature sensor for broad leaves Type LAT-B3 and LAT-B4

    Scope of application

    For continuous measurement of leaf surface (Tleaf), surrounding ambient air temperature (Tair), and leaf-to-air temperature difference (Δtleaf-to-air)

    Suitable for leaf dimensions

    LAT-B3: Leaf length > 1.4 cm, stable magnet attachment to leaves with a thickness of < 0.7 mm.

    LAT-B4: Leaf length > 1.4 cm, stable magnet attachment to leaves with a thickness of < 0.7 mm or alternatively with carbon-rod-clamp to leaves with a thickness > 0.7 mm.

    Special feature/limitations

    Measurement of the absolute temperatures of leaf surface and ambient air, high accuracy in leaf-to-air temperature difference (individually matched probes)
    Dual-probe spacing: User-configurable distance between Tleaf and Tair probes between 0 to max. 35 mm

    Measurement range

    -25 to +70 °C

    Resolution

    Theoretically infinite depending on the data logger used
    e.g.
    CR300-Logger (at 25°C): < 0,000025 °C
    DL 18 Logger (at 25°C): < 0,00035 °C

    Accuracy

    Sensor dependent:
    Tolerace of absolute Tair & Tleaf
    ± 0,4 °C in temperature range between +5°C to +40°C
    ± 0,8 °C in temperature range between -25°C to +70°C


    Tolerace of Leaf-to-Air-Temperature difference (∆Leaf-Air):
    ± 0,2° in temperature range between -25°C to +70°C
    Logger dependent, e.g.:
    CR300-Logger (at 25°C): ± 0,01 °C
    DL 18 Logger (at 25°C): ± 0,03 °C:

    Data logger requirements & sensor output signal

    Analog: 0 V to Vex (supply voltage), 2 single-ended channels

    Digital: SDI-12: Output in °C

    Data logging

    Flexible options for data logging & transmission:

    1. Data logger, manual readout (analog or SDI-12, e.g. DL18 or CR350)
    2. LoRaWAN, wireless data transmission (analog, e.g. IoP-S-LA)
    3. NB-IoT, wireless data transmission (analog, e.g. IoP-S-NA, IoP-S-LTEMA)

    Power supply

    VEX (! Regulated!) 0.5 to 2.5 VDC, required excitation interval time max. 100 ms. Power consumption negligibly low, max. 16.5 nWh per measurement

    Operational conditions

    Air temperature: -25 to 70 °C, rel. humidity: 0 to 100%

    Size and Weight

    Diameter sensor 12mm, weight 0.9g (only sensor, without cable)

    Sensor cable length

    0.5m + 4.5m pluggable extension, plug extension up to max. 50 m possible

    Manual

    LAT-B3

    LAT-B3(330.2 kB)

    Technical data sheets

    LAT-B3

    LAT-B3(316.4 kB)

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    Accessories & Compatible Products

    Data logging

    From small and compact solutions to fully developed measurement networks, Ecomatik offers turnkey system solutions for sensor data acquisition in any required size:

    • IoP systems (Internet of Plants) for wireless sensor data acquisition at freely positionable measurement points. Customer-specific preconfigured plug-and-play systems with online data visualization and data transmission via NB-IoT/LTE-M or LoRaWAN.
       
    • Mini systems with compact 4-channel data logger (DL18 and DL18-BLE) for flexible long-term measurements under field conditions. Compact and robust systems for connecting various sensors and decentralized measurement points.
       
    • Maxi systems for customer-specific system integration and individual measurement installations. From planning to implementation of complex measurement networks including sensors, power supply, and data transmission.
       
    • SDI-12 converter for analog signals for converting analog sensor signals into digital SDI-12 data. Enables the integration of ECOMATIK sensors into measurement systems without suitable analog inputs.

    Note

    The output signal of all Ecomatik temperature sensors is an analog DC voltage. In addition, digital SDI-12 interfaces are available depending on the sensor model. Our temperature sensors are therefore compatible with almost all common data loggers and microcontrollers with analog voltage input channels (e.g. Arduino) and can also be integrated into digital measurement systems via SDI-12. If you are unsure about the compatibility of an existing data logger or measurement system, please feel free to contact us at any time.

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    You need a quotation, have questions about a product, or need extensive technical advice in the context of your project planning. Starting with an initial determination of your needs, through the detailed planning of the required measurement equipment and data transmission technology, up to professional implementation on site, we are at your disposal at any time with advice and action.

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    Your contact details and Assessment of your needs

    Like so many things, everything started with an idea ...

    In the case of the plant scientist and founder of ECOMATIK, Dr. Liu, it was the idea that modern measurement technology should enable crucial plant physiological parameters to be measured directly, precisely and with high temporal resolution on the plant itself. It was obvious to him that there is an information potential of immense value in the detailed understanding of immediate reactions of plants to their environment...