High-Precision DC3 Circumference Dendrometer for Tree Growth Monitoring,specification,price,image-Bio-Equip in China

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Application: The DC3 and DC4 are improved versions of the DC1. The tension of the steel wire rope is now applied radially, making the pressure exerted on the tree independent of the stem diameter. This allows measurement results from trees of different diameters to be compared directly. The sensor is attached to the tree using a steel wire rope made of an alloy with a low coefficient of thermal expansion. Small plastic rings reduce the pressure on the tree and minimize frictional resistance, greatly enhancing sensitivity.

The difference between DC3 and DC4 is that the DC4 has a larger measurement range. If the tree trunk is relatively thick or grows quickly, DC4 is more suitable.

Features:

Suitable for tree diameters > 5 cm
Wire rope pressure on the tree is independent of stem diameter, allowing direct comparison across different tree sizes
Wire rope tension automatically adjusts to stem diameter for sensitive response
No damage to the plant
Resistant to wind, snow, falling branches and small fruits, ensuring stable measurement
Easy to install
Simplified readjustment using a turnbuckle
Data must be converted to obtain circumference change (free Excel program available)
Measured trunk should be as close to circular as possible
Low power consumption – e.g., with a DL10 data logger, one built-in battery can record continuously for over two years
15 years of successful use in diverse global regions (polar, tropical, alpine, desert)
Resolution up to 0.03 µm (depending on data logger resolution)
Probe temperature compensation
Compatible with common data loggers, such as Delta-T Logger, Campbell Logger, DataTaker Logger

Technical Specifications

Suitable for stem diameter	> 5 cm
Sensor measurement range	25.4 mm
Readjustment measurement range	Unlimited
Single measurement range (circumference)	Stem diameter 50 mm: 35 mm Stem diameter 10 cm: 35 mm Stem diameter 50 cm: 28 mm Stem diameter 100 cm: 28 mm
Accuracy	± (0.04% of reading + 0.6 µm) (CR300 Logger) ± (0.1% of reading + 1 µm) (DL18 Logger)
Resolution	0.03 – 6 µm (depends on data logger)
Linearity	< 0.7%
Temperature coefficient (sensor)	< 0.1 µm/°C
Thermal expansion coefficient (wire rope)	< 1.4 × 10⁻⁶ /K
Weight (sensor only)	37 g
Sensor cable length	5 m, extendable up to 100 m
Operating conditions	Temperature -25 to 70 °C, Humidity 0–100%

Growth Measuring Instrument Data Logger

Number of sensors connectable	1 – 4
Resolution	0.3 – 0.6 µm (depends on sensor model)
Memory	1,900,000 data points (with 4 sensors, logging every minute, sufficient for one year)
Interface	USB
Battery	One built-in battery provides over one year of continuous use
Waterproof	Yes

Origin: Germany