Rotring Pen Set

50cm Caliper

Material : Metal

Measurement Range : 0 50cm

Resolution : 0.1mm

Display Type : Other, Analog

Power Supply : None

Suunto E203 Digital Compass

Material : Plastic and metal casing

Measurement Range : 22 103

Resolution : Precise digital readouts

Display Type : Other, LCD screen

Power Supply : Battery operated

Sensor Type : Digital magnetic sensor

Spherical Densiometer

Material : Acrylic Dome, Metal or ABS Body

Measurement Range : 0 to 100% Canopy Density

Resolution : 1% (Grid Square Approach)

Display Type : Other, Mirror with Etched Grid

Power Supply : Not Required (Manual Operation)

Sensor Type : Optical (Visual Estimation)

Radio Altimeter

Material : Plastic and Metal

Measurement Range : 0 12000 ft

Resolution : Fine markings for accurate readings

Display Type : Analog, Other

Sensor Type : Barometric