tdr 300 soil moisture meter TDR Soil Moisture with Probes – Boston Instruments
SKU: 71337020418
tdr 300 soil moisture meter

tdr 300 soil moisture meter TDR Soil Moisture with Probes – Boston Instruments

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Description

tdr 300 soil moisture meter TDR Soil Moisture with Probes – Boston InstrumentsPrecise as a laboratory and as mobile as a cell phone. This TDR device measuring the soil moisture content, the soil conductivity EC, and the level of salt contamination can now be performed as fast and easy as never before! Within two seconds, the moisture content value, the temperature, and the soil conductivity EC are displayed on its clear display. The probes will report soil EC as standard simultaneously with soil moisture content percentage. The

Precise as a laboratory and as mobile as a cell phone.

This TDR device measuring the soil moisture content, the soil conductivity EC, and the level of salt contamination can now be performed as fast and easy as never before! Within two seconds, the moisture content value, the temperature, and the soil conductivity EC are displayed on its clear display.

  • The probes will report soil EC as standard simultaneously with soil moisture content percentage.
  • The probes measures conductivity with the same large soil volume as it will be used for the TDR moisture measurement.
  • It’s durable and waterproof construction ensures safe handling even under difficult environmental conditions.

Soil Moisture readings for top layers

Using a highly accurate TDR probe for:

  • Highly accurate TDR technology
  • Direct measurement of soil moisture content
  • Integrated soil temperature sensor
  • Soil electrical conductivity measurements
  • Large measurement volumes
  • User replaceable rods.

Benefits at a glance

  • Extremely robust and stable
  • Powerful battery for hundreds of measurements
  • Easy use with one hand via four buttons
  • High reliability even under challenging environmental conditions

Applications and advantages

  • Connected to the TDR is the two-rod probe
  • Based on radar technology
  • Handy two-rod probe with solid rods
  • Measurement via radar technology with an electromagnetic TDR impulse with 1 GHz to measure the water content precisely to material saturation
  • Display of measuring value within two seconds
  • Robust and watertight structure
  • Probe can be connected to a PC for data collection, change of operation mode or calibration
  • Delivery with a resistant hard shell case for trouble-free transport

Technical Specifications

Height

36mm

Width

64mm

Length

150mm

Weight

(with accumulator)

Power Consumption

Power Down

ca. 35μA

Idle

- Background Illum. OFF
- Background Illum. Max

ca. 26mA
ca. 56mA

Sonde eingeschaltet

ca. 100mA

Measurement

ca. 350 mA

Measurement per Charge

20°C / Background Illum. Max
Mode – Continuous Measurement

ca. 5000

Connectable Sensors

TDR tube access probe

Storage Temperature

-30°C up to 80°C

Operating Temperature

-20°C up to 70°C

Charging Temperature

10°C up to 30°C

Charging Voltage

Nom. 12V, Max. 15V, Min. 12V

Charging Current

ca. 1A

Charging Time

At exhaustively discharged accumulator. 2h

Accumulator

Ni-MH (4 x 1.2V) (AA), 2000mAh, >1500 Measurements

Physical BUS

RS485

Bus-Protocol

IMP-BUS-Protokoll II

IMP-Bus Port Settings

8 Data Bits, 2 Stopp Bits, Odd Parity

 

TDR Moisture Sensor Probe Technical Specifications:

Power supply:

7V..24V-DC

Power consumption:

100mA @ 12V/DC during 2..3 sec. of measuring

Moisture measuring range:

0..100% volumetric water content

Accuracy (in % volumetric water content):

conductivity range:

0..6dS/m

6..20dS/m

> 20dS/m

Moisture range 0..40%:

±1%

±2%

with material 
specific calibration

Moisture range 40..70%:

±2%

±3%

Repeating accuracy:

±0.2%

±0.3%

Temperature caused drift of electronics 
(full range):


±0.3%

Soil temperature measuring range:

-15°C...50°C

Soil temperature measuring accuracy:

±1,5°C absolute, ±0,5°C relative

Measurement volume:

1,25L ≙ 160x100mm diameter

Operating Temperature:

-15°C...50°C (extended temperature range on request)

Calibration:

Calibration for a wide range of standard soil types (in accordance with Topp (equation))

standard calibration for most soils
customizable material specific calibration
storage of up to 15 user defined calibration curves
calibration of dialectric permittivity is possible

Probe body:

waterproof sealed PVC

Size:

155 x Ø63mm

Rod length:

200mm

Rod diameter:

6mm

Interfaces:

IMP-BUS
RS485
Analogue output: 2x 0..1V, 0(4)..20mA*

 

Delivery within 2-45 business days.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 71337020418

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4.2 ★★★★★
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Verified Purchase
STL Girl
Houston, US
★★★★★ 5
Where has this been all my life. Fits a lot. Doesn’t get gross.
Color: Black, Size: with Dishcloth Holder
I don’t know where this thing has been all my life. Over the years I’ve tried so many ways to keep all the dishwashing stuff organized and not dripping on the counter or getting lost in the sink. Every holder I had before would catch water and end up gross. This one actually works. It fits perfectly on the back ledge of my sink, and I love the little spout that angles into the sink. It’s just big enough to clear the edge but small enough that it’s not in the way. The rack for hanging our blue scrubby is my favorite part. There is never a great place for that thing. The rack does come unhooked easily, including if we bump it, but was easily fixed by taking some pliers and just tightening where it clamps on a bit. It holds more than I expected. The bottom is angled so water drains right out through the spout instead of pooling. It’s very nice quality - does not feel cheap. Honestly, I love it more than I thought I would.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2025
M
Verified Purchase
M. A. Mebane
Pawtucket, US
★★★★★ 5
Good Product
Color: Black, Size: with Dishcloth Holder
Great product. Serves its designed purpose.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
T
Verified Purchase
Terwya
Omaha, US
★★★★★ 3
Its looks nice but its not as it seems in the photos
Color: Black, Size: with Dishcloth Holder
Its ok. Unless I am doing something wrong it is not adjustable unless they meant only the drain. The middle section couldn't be removed to make an area bigger or smaller it's permanent. So the middle section is a lot smaller than it seems. The taller section to place your cleaning tool can not be tall over wise it just hangs over and drips in the sink. The drain part is a nice idea but because it's straight and not curved a little down, the water stays in the drain and you have to tip it forward to get the water out. Looked nice in black.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2026
F
Verified Purchase
Frank 's wife
Birmingham, US
★★★★★ 5
Great organization
Color: Black, Size: with Dishcloth Holder
Cleans up the sink area and the built in drain works good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
P
Verified Purchase
Pam Crosby
Los Angeles, US
★★★★★ 5
Just what I needed!
Color: Black, Size: with Dishcloth Holder
Holds all my sink brushes and scrubbies. I have black accents in my kitchen and goes nicely. I especially love the dish rag bar.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026

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