The ΔLA-B (ΔT Leaf-to-Air-Broadleaf type) is a highly precise sensor for continuous measurements of temperature differences between leaf surface and ambient air. The signal is captured by means of a very thin chain (10-fold) of thermocouples. Distributed over the leaf surface, multiple measurement points are directly touching the leaf surface, providing a spatially integrative temperature signal. Designed for broad leaves, the sensor is mounted at the leaf with a light-weight wire frame.
Advantages
Precise and continuous measurement of leaf-to-air temperature difference
Multiple measurement points distributed over leaf surface, spatially integrative sensor signal
Sensor output in mV, recordable with most of the common data loggers, no calibration is needed for signal transformation in °C
Minimal load on the target, no injury to plants
Installation resistant against wind and rain
Leaf size and shape specific ordering possible
Limits
Not suitable for leaf sizes smaller than 3 cm
Delivery
Complete with 5 m cable
Fixing materials and installation tools
Options / Ordering Information
Cable extension (50 m max, please specify in meters)
If necessary, adjustments for different leaf sizes and shapes are possible
Data Logger with integrated light, air humidity and air temperature sensors.
Name ΔLA-B : ΔT Leaf-to-Air Sensor, broadleaf type
Application position,suitable for leaf size : Leaf surface, standard size for leaves between 3 to 20 cm length
Principle of measurement: Chain of thermocouples, 10-fold
Options: Distance between measurements points at the leaf surface and measurement points in the air adjustable
Output signal type: mVolt
Range of the sensor : ΔT = +/- 20°C
Accuracy: Depends on data logger:
CR1000: +/-(0,06% x Messwerte+0,01)°C
Resolution: CR1000: 0,0025 °C
Size and weight: 2 cm x 2 cm x 0,1 cm, ca. 2 g
Standard cable length: 5 m, max. 50 m
Operating conditions: Air temperature:-25 to +70 °C, (CR1000: 0 to 40°C), Air humidity: 0 to 100%
