Overview:

DBH (diameter at breast height) is the diameter of a tree trunk measured at 1.3 m above ground level. The DJ-310X series is an extremely simple yet precise tool for tracking changes in tree DBH over time.

Key Features：

• The scale is clear and easy to read due to the laser etching process. Even after long-term use, the scale will not disappear.
• Stainless-steel construction; no rust in harsh environments.
• Scale graduated directly in π-units, allowing instantaneous reading of both diameter and diameter increment.
• Using springs as the fixation device, no harm to the trees and enables long-term monitoring without any damage.
• The cursor scale and the main scale are integrated on the same plane, with the cursor scale positioned below the main scale. This design minimizes the overall size, making it convenient and quick to read the values.

Technical Specifications

Minimum measurable girth: 5π cm

DBH ranges (other sizes available on request):
DJ-3101: 5–12 cm

DJ-3102: 10–22 cm

DJ-3103: 20–42 cm

DJ-3104: 40–65 cm

Resolution: 0.01π cm

Spring mounting holes are spaced at 3.14 centimeters.

Main rule material: SUS304 stainless steel

Spring material: SUS304 high-tension spring

Buckle length: 1 cm

Initial tension: 259.29 g

Spring constant: 32.01 g /mm

Transverse elastic modulus: 7 000 kg /mm

Operating temperature: –40 °C to +70 °C

Our company is specialized in business of ecological and environmental instruments.
We have our own brand products and also is a sales services center that global dozens of advanced instrument manufacturers in Chinese.
We have an operation center and a tax free warehouse, except that we also establish five regional offices in Shanghai, Beijing, Kunming， xian and Hefei.
We depend on the advanced inventory network management system, creating a mature storage system.
Our goal is to pursue the perfect service and reflect the Dianjiang’s value.
We cooperate with the professional express company, such asUPS, DHL and FEDEX. They can accurately and quickly deliver our products to our customers.