Based on the proven time-domain measurement technology, the portable TDR 300 accurately measures soil moisture across the full range of soil moisture conditions. Select from the 12cm or 20cm (4.8in or 8 in) probe rods to suit your measurement depth.

The TDR 300 has two volumetric water content modes; one for standard soils and one for higher clay soils. In volumetric water content (VWC) mode, the meter converts a measured electrical signal into percent soil moisture content using an equation valid over a wide range of mineral soils. In irrigation mode, the meter displays a relative water content (RWC) on a scale of 0 to 100 corresponding to a user-defined upper and lower soil moisture reference level. Water deficit, the amount of water needed to bring the soil moisture content up to the upper reference level, is also calculated and displayed. The reference levels are easily programmed into the meter with the accompanying software. Create up to 2 management sites based on your soil types and crop needs. Use the raw reading mode (measurement period in microseconds) to do soil-specific calibrations.

An internal 4,096 point data logger and RS-232 port allow for use with a GPS / DGPS for geo-referenced soil moisture measurements. Unit is powered by 4 AAA batteries (12 month life). Software and PC cable included.

Install PVC access tubes and take moisture deeper in the soil profile.

Measurement rods must be purchased separately for Field Scout TDR products.

Ordering Information
6430FS Field Scout TDR 300 Soil Moisture Probe
2950CV5 GPS/DGPS Cable
6429FS Two 7.5cm (3in) Rods
6431FS Two 12cm (4.8in) Rods
6432FS Two 20cm (8in) Rods