Agricultural Solutions

Forestry Instruments

Q: Does stress-wave tomography damage the tree?

It is considered non-destructive. Small sensors are attached around the trunk and gentle taps send sound waves through the wood. Slower wave speeds indicate decay or cavities, which the software shows as a cross-section image.

Q: How is tree age measured without felling?

An increment borer is screwed into the trunk to extract a thin core of wood. The annual rings on the core are counted and measured to estimate age and growth rate, and the small hole is left to heal.

Q: What is a practical starter kit for field surveys?

Many teams begin with a laser hypsometer, an increment borer, a dial thickness gauge, a slope goniometer and a GPS track recorder. Tomography is added where tree risk assessment or heritage tree management is required.

Field instruments for measuring tree height, growth and slope, mapping survey routes and detecting internal decay in living trees without felling them.

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Measuring forests, parks and urban trees

Forestry instruments support forest inventory, afforestation monitoring and tree risk assessment. Laser hypsometers measure tree height and distance, increment borers and hammers extract wood cores to read age and growth rate, slope goniometers record terrain, thickness gauges measure bark and wood samples, and GPS track recorders document survey routes and plot locations. Stress-wave tomography maps internal decay and cavities in standing trees without cutting them. Forestry departments, environment ministries, municipalities managing urban trees, national parks, universities and research centres use these tools in the field. ASFAN supplies and supports forestry equipment and helps specify complete survey kits.

ASFAN supplies and supports forestry instruments for forestry departments, municipalities, parks and universities across Qatar.

Forestry Instruments

Laser Tree Height Hypsometer

A digital height-measuring instrument for measuring tree height in forestry surveys; also usable for electric power lines, iron towers, freight transport and other jobs needing distance, angle and height measurement.

Distance range0.1M ~ 20M
Distance accuracy±5mm
Angle range±60°
Angle accuracy0.5°

Features & full specifications

Key features

Distance and angle measurement function
Two-point and three-point height measurement
Front sight for aiming
Rechargeable lithium battery, about 8 hours continuous use when fully charged
Auto shut-down after set idle time (max 999 s)
High-contrast OLED display
Hand-held or fixed use (fixed mode on a tripod)

Technical specifications

Distance range	0.1M ~ 20M
Distance accuracy	±5mm
Angle range	±60°
Angle accuracy	0.5°
Height range	0.5M ~ 35M
Height accuracy	0.2M
Laser power	5mW
Working temperature	-20℃ ~ +40℃
Power supply	3.7V/1500mAh rechargeable lithium battery
Size and weight	180mm × 170mm × 50mm, 550g

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Dial Thickness Gauge

A dial gauge for measuring the thickness of rubber, plastic, fabric, paper, leather, adhesive tape, film and similar materials, offered with a short or deep throat.

Graduation value0.01 mm
Measuring range0~10 mm
Throat depth20 mm (standard) / 120 mm (deep throat)
Probe styleΦ10mm ceramic plane

Features & full specifications

Key features

Analog dial with 0.01 mm graduation
Φ10 mm ceramic flat probe

Available configurations

Standard frame, 20 mm throat depth
Deep-throat frame, 120 mm throat depth

Technical specifications

Graduation value	0.01 mm
Measuring range	0~10 mm
Throat depth	20 mm (standard) / 120 mm (deep throat)
Probe style	Φ10mm ceramic plane
Measuring pressure	below 1.8N / 2.4N

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Magnetic Slope Goniometer

A high-precision bevel protractor/declinometer for measuring slope, horizontal and vertical angles.

Accuracy0.5 degree
Weight0.3kg
WaterproofYes
Materialplastic and steel ruler

Features & full specifications

Key features

Measures slope, horizontal and vertical
Wear-resistant ABS engineering plastic
Strong magnet for stable attachment
Large-number dial for easy reading
Gradient and angle comparison table

Technical specifications

Accuracy	0.5 degree
Weight	0.3kg
Waterproof	Yes
Material	plastic and steel ruler

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Tree Increment Borer

A classic instrument for fast, reliable evaluation of tree age, increment and soundness; also used for decay checks, pollution control, wood density and chemical penetration control.

Length range100 mm (4") to 1000 mm (39")

Features & full specifications

Key features

Evaluates age, increment and soundness of trees
Lengths from 100 mm / 4" up to 1000 mm / 39"
Custom lengths available

Technical specifications

Length range	100 mm (4") to 1000 mm (39")

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Tree Increment Hammer

A rugged, field-adapted tool for determining tree growth over the past few years; the pointed end is driven into the stem and a small sample is extracted from the hollow pipe ejector.

Graduationup to 5 cm / 2"
Materialsteel, plastic handle, brass details

Features & full specifications

Key features

Extracts a small core sample via a hollow pipe ejector
Graduation up to 5 cm / 2" for quick reading
Durable steel with plastic handle, brass-detailed ejector and carrying string

Technical specifications

Graduation	up to 5 cm / 2"
Material	steel, plastic handle, brass details

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Handheld GPS Track Recorder

A handheld GPS unit for outdoor positioning, navigation and traversal, with professional functions for point measurement, stakeout, ranging and area measurement.

Forestryforest restoration, forest tenure reform, returning farmland to forest and grassland
Agriculturesoil testing formula, precision agriculture management, pest control
Communicationnetwork planning, base station and tower positioning, line resource inventory
Geologymineral geological survey, engineering, hydrogeological survey, regional geological survey

Features & full specifications

Key features

Outdoor positioning and navigation
Point measurement, stakeout, ranging and area measurement
Outdoor uses: orienteering, wilderness rescue and exploration, finding campsites and water, desert crossing

Technical specifications

Forestry	forest restoration, forest tenure reform, returning farmland to forest and grassland
Agriculture	soil testing formula, precision agriculture management, pest control
Communication	network planning, base station and tower positioning, line resource inventory
Geology	mineral geological survey, engineering, hydrogeological survey, regional geological survey

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Tree Nondestructive Stress-Wave Tomography Detector

A portable pulse-detection tomography device made up of a detector (test box and tool box) and tree defect imaging software. It detects the internal defects of living trees such as ancient trees and street trees.

Stress wave speed0–3000 m/s
Stress wave transfer time0<t<65535 µs
Time resolution1 µs
Power source4.2V Li-ion battery

Features & full specifications

Key features

Up to 12 sensors
Stress-wave transfer time displayed in real time during detection
Software records stress-wave transfer data per point, propagation line diagrams and wood interior defect images
Printable report and wood cross-section image output

Technical specifications

Stress wave speed	0–3000 m/s
Stress wave transfer time	0<t<65535 µs
Time resolution	1 µs
Power source	4.2V Li-ion battery
Work time	10 h continuous
Weight	tool box ≤8kg; instrument box ≤4kg
Tool box size	(L)455±5, (W)420±5, (H)115±5
Instrument box size	(L)310±5, (W)225±5, (H)136±5
Environment	-10~40℃, ≤90% humidity
Sensors	Low noise piezoelectric sensor

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Forest inventory

Height, diameter and plot location data feed volume and biomass estimates, allowing agencies to track forest resources, carbon stocks and the success of planting programmes.

Growth and age studies

Increment cores reveal annual rings, giving researchers tree age and growth rates that reflect climate, water availability and site management over many years.

Urban tree safety

Stress-wave tomography shows hidden decay inside trunks, helping municipalities decide which trees in streets, parks and schools need pruning, support or removal.

Afforestation and rangeland projects

GPS tracking and slope measurement document planting sites and terrain, supporting planning, reporting and long-term monitoring of greening and land restoration projects.

Frequently Asked Questions

Does stress-wave tomography damage the tree?

It is considered non-destructive. Small sensors are attached around the trunk and gentle taps send sound waves through the wood. Slower wave speeds indicate decay or cavities, which the software shows as a cross-section image.

How is tree age measured without felling?

An increment borer is screwed into the trunk to extract a thin core of wood. The annual rings on the core are counted and measured to estimate age and growth rate, and the small hole is left to heal.

What is a practical starter kit for field surveys?

Many teams begin with a laser hypsometer, an increment borer, a dial thickness gauge, a slope goniometer and a GPS track recorder. Tomography is added where tree risk assessment or heritage tree management is required.

Equip your forestry team

Tell us about your survey programme and the measurements you need. ASFAN will recommend suitable instruments and prepare a quotation.

Request a Quote