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What do I measure?

Moisture by volume and relative moisture


The TDR 100 is the ideal tool for quick, reliable, and convenient measurement. Whether you're in a field, greenhouse, or laboratory, the TDR 100 will provide the results you want.

Based on the proven time-domain measurement technology, the portable TDR 100 accurately measures soil moisture across the full range of soil moisture conditions. Choose either the 7.5cm,12cm or 20cm (3in, 4.8in, or 8 in) probe rods to suit your measurement depth. The LCD interface provides two modes: volumetric water content and relative water content (irrigation management) mode.

Hand-held design allows for easy transporation and storage. Units connected by 5ft. Cable. Measures in less than one second.

Key Advantage

- Usable in the field, greenhouse and laboratory
- Simple and reliable


Resolution 1.0%
Accuracy ±3.0% volumetric water content with electrical conductivity <2 dS m –1 and clay content < 30%
Range 0% to saturation (Saturation is typically around 50% volumetric water)
Power 4 AAA alkaline batteries Approximately 12 month life
Display 16 character, 2 line LCD
Weight 1.5 lbs. (0.68 kg)
Probe Head Dimensions 4.1” x 2.8” x 0.7” (10.5cm x 7cm x 1.8cm)
Rod Dimensions Length : 4.8” (12cm) or 7.9” (20cm)
Diameter: 0.2” (0.5cm) Spacing: 1.3” (3.3cm)

Measurement rods

- 2 rods L. 3,8 cm - 2 rods L. 7,5 cm - 2 rods L. 12 cm - 2 rods L. 20 cm

Ask for a quotation


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