Leaf Temperature Sensor Typ ΔLA-B

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.


  • 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


  • Not suitable for leaf sizes smaller than 2 cm


  • Complete with 5 m cable
  • Fixing materials and installation tools

Options / Ordering Information

  • Cable extension (50m 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.

leaf temperature sensor type ΔLA-B on common hazel

Technical specifications

Name ΔLA-B : ΔT Leaf-to-Air Sensor, broadleaf type
Application position,
suitable for leaf size
Leaf surface, standard size for leaves between 2 to 8 cm length
Principle of
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:
DL 80: +/-(0,04% x Messwerte+0,015)°C; CR1000: +/-(0,06% x Messwerte+0,01)°C
Resolution DL 80: 0,0008 °C; CR1000: 0,0025 °C
Size and weight 3 cm x 3 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%