To Measure Is To Know

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TDR 100
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FieldScout TDR 100 Soil Moisture Meter with Case

ORDER WHILE SUPPLIES LAST - DISCONTINUED SOON! Obtain soil moisture readings at the press of a button. Read More

* TDR Rods not included, please order separately TDR Calibration feature
Quantity Item Name Item Number Price
FieldScout TDR 100 Soil Moisture Meter with Case 6440FS $735.00
The following items are required for the product to function properly. They are sold separately.
Quantity Item Name Item Number Price
TDR Rods - Two 1.5in (3.8cm) Rods 6428FS4 $59.00
TDR Rods - Two 3in (7.5cm) Rods 6429FS4 $59.00
TDR Rods - Two 4.8in (12cm) Rods 6431FS4 $59.00
TDR Rods - Two 8in (20cm) Rods 6432FS4 $59.00
The following items are optional.
Quantity Item Name Item Number Price
Replacement TDR 100 Soil Moisture Probe 6440FSS $445.00
Replacement Case for TDR 100 6440CASE $49.00
Pilot-Hole Maker For TDR Meters 6430PH $70.00
Firmware Chip for TDR Meters CHIP-TDR3 $47.00
Product Features

FieldScout TDR 100 Soil Moisture Sensor


Manage water responsibly and reduce operating expenses
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. Select from the 1.5in, 3in, 4.8in, or 8 in (3.8cm, 7.5cm, 12cm or 20cm) 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. This meter has no data logging or geo-referencing capability. For those features, please take a look at our FieldScout TDR 300 Soil Moisture Meter.
  • Instantaneous readings of root zone soil moisture
  • Ideal for measuring containers on benches
  • Probe block comes with a 5 ft (1.5 m) cable
  • Configure meter with FieldScout software (included)
  • TDR 100 meter includes hard-sided carrying case (Item 6440CASE)
  • Rods sold separately
  • Replacement probe is Item 6440FSS

NEW FEATURE ADDED IN 2012 - The TDR family of meters now includes the option to perform a calibration on an individual meter.  The calibration is done in 2 media; air and distilled water.  This new feature took effect with firmware version 6.5 and is included with units shipped after January 1, 2012. Meters with firmware versions earlier than v. 6.5 can be upgraded by purchasing and installing an updated microcontroller chip (Item #CHIP-TDR3, see above table for purchasing). See Calibration Feature of FieldScout TDR Meters for more details.





Measurement Principle: Time-domain measurement methods

Measurement Units: Percent volumetric water content

Resolution: 0.1% volumetric water content

Accuracy: ±3.0% volumetric water content with electrical conductivity  < 2 mS/cm

Range: 0% to saturation (Saturation typically around 50% volumetric water)

Battery/Life: 4 AAA alkaline batteries; approximately 12-month battery life

Manuals / Literature

Find all of our Product Manuals and literature in our Documents Library




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