DD-S Diameter Dendrometer (small)

The Ecomatik range of small diameter dendrometers are used for measuring plant diameters between 0 and 5 cm. With measuring ranges of 11 mm or 25mm (depending on variation) and with linearity of <1% or 1%. All dendrometers are supplied with a bare ended 5m sensor cable, extendable up to 100m.

• DD-S1: Small Diameter Dendrometer 1
  • Measuring plant diameter between 0 and 5cm
  • Range of measurement 11mm
  • Linearity: 1%
• DD-S2: Small Diameter Dendrometer 2
  • Quick mount design, with 2 frames included (0-2.2cm and 1.8-5cm)
  • Measuring plant diameter between 3 and 30cm
  • Range of measurement 11mm
  • Linearity: 1%
• DD-S3: Small Diameter Dendrometer 3
  • Quick mount design, with 2 frames included (0-2.2cm and 1.8-5cm)
  • Measuring plant diameter between 3 and 30cm
  • Range of measurement 25mm
  • Linearity: <1%

Sensor model name	Diameter Dendrometer Small Type DD-S1	Diameter Dendrometer Small Types DD-S2 and DD-S2W (hermetically sealed)
Scope of application	Slow/average growth rates	Slow/average growth rates
Suitable for diameter	0 to 5 cm	0 to 5 cm
Special features/limitations	Fixation with a standard mounting frame	Fixation with quick-mount frame, much easier and faster installation, DD-S2W: sealed to withstand with a wide range operational conditions; see below.
Measurement range	11 mm linear	11 mm linear
Resolution	Data logger dependent e.g.: CR300 series: 0.01 μm Dendrometer logger DL18: 0.2 μm	Data logger dependent e.g.: CR300 series: 0.01 μm Dendrometer logger DL 18: 0.2 μm
Accuracy	Dendrometer dependent: max. ± 4.5% of the measured value (stable offset) Data logger dependent e.g.: CR300 series: ± (0.04% of the measured value +0.3 μm) Dendrometer logger DL18: ± (0.1% of the measured value +0.45 μm)	Dendrometer dependent: max. ± 4.5% of the measured value (stable offset) Data logger dependent e.g: CR300 series: ± (0.04% of the measured value +0.3 μm) Dendrometer logger DL18: ± (0.1% of the measured value +0.45 μm)
Output signal	Analogue, 0V to Vex (excitation supply voltage)	Analogue, 0V bis Vex (excitation supply voltage)
Temperature drift of the sensor	< 0.2 µm/°C in the whole measurement range	< 0.2 µm/°C in the whole measurement range
Linearity	< 1%	< 1%
Operational conditions	All Models: normal outdoor field conditions, -25 to–70 °C, 0 to–100% relative air humidity	All Models: normal outdoor field conditions,-25 –70 °C, 0 to 100% relative air humidity;
		Hermetically Sealed Model DR1W: extreme environmental conditions including underwater, below snow cover, under exposure to strongly corrosive substances e.g. saltwater, ash, aggressive agricultural chemicals
Weight (sensor without cable)	13 g	15 g /DD-S2), 25g (DD-S2W)
Power supply	Vex (! stabilised!) 0.5 to 10 VDC, Power consumption max. 0.28 μWh per measurement	Vex (! stabilised!) 0.5 to 10 VDC, Power consumption max. 0.28 μWh per measurement
Material	Stainless steel and aluminium	Stainless steel and aluminium
Sensor cable length	5 m, extendable on request to max. 100 m	5 m, extendable on request to max. 100 m

Case studies

Downloads and Technical Info

Scripts And Calculations