• Bild Slider Blatttemperatur
  • Bild Slider Blatttemperatur

Temperature broad leaf (LAT-B3)

Leaf-to-Air-Temperature sensors (LAT) are used for direct, continuous and high-precision temperature measurements. The measured temperature parameters include absolute temperatures of the leaf surface, leaf-surrounding ambient air (Tair), and the temperature difference between leaf surface and ambient air (ΔTleaf-to-air). These devices are suitable for long-term application in outdoor conditions. Due to their extremely low power consumption, Ecomatik LAT sensors are ideal for battery-powered solutions, e.g., in IoT applications.

LAT-B3: Leaf-to-Air Temperature Broadleaf Type

With it's ultra-light-weight magnetic clamp mechanism the LAT-B3’s is mounted on a leaf where it uses two high-precision micro-thermistor probes to simultaneously measures absolute leaf temperature (Tleaf) and air temperature (Tair). In every individual sensor the two thermistor probes are factory-matched, ensuring maximum precision when determining the difference between leaf and air temperature (ΔTleaf-to-air).


  • 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


  • 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

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

Leaf length > 1.4 cm, leaf width between 0.8 and 20 cm (other dimensions on request), stable magnet attachment to leaves with a thickness of up to 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


Theoretically infinite depending on the data logger used


CR300-Logger (at 25°C): < 0,000025 °C
DL 18 Logger (at 25°C): < 0,00035 °C


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

Minimum logger requirements:

2 single ended channels, providing a switched reference voltage (Vex)
Resolution: 12 bits in the measuring range from 0 to Vex
All loggers of Campbell Scientific, as well as the DL 18 logger meet these requirements

Sensor output signal: analogue DC voltage in the range from 0 to Vex

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


Technical data sheets

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Accessories & Compatible Products

Data loggers

From small and compact to an extensive measuring network, Ecomatik offers complete system solutions for sensor data acquisition in any desired size:


The output signal of all Ecomatik temperature sensors is an analogue DC voltage. Our temperature sensors are therefore compatible with almost all common data loggers and microcontrollers with analogue voltage input channels (e.g. also Arduino). If you are unsure about the compatibility of an existing data logger, please do not hesitate to contact us.


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With your consideration and input, we determine which of our products best meet your needs. We are also happy to design fully-integrated measuring stations (plant, climate, soil sensors), including an independent power supply and mobile data transmission, depending on your requirements.

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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...