SKU: 71337020418
tdr 300 soil moisture meter

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

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Ships within 48 hours · Estimated delivery Sep 28 - Oct 3

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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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WahWah
Boise, US
★★★★★ 4
great little assortment of shaving heads
Color: Rose Pink
I love that it's waterproof and rechargeable with several different shaving heads that snap on and snap off very efficiently. Everything you need in one handy tool.
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Reviewed in the United States on April 29, 2026
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Tony Ingraham
Lowell, US
★★★★★ 5
My wife says it worked well.
Color: Pink
My wife says it worked well and with all the accessories she is very pleased.
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Reviewed in the United States on October 30, 2025
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K
Dallas, US
★★★★★ 5
Good value
Color: Blue, Color: Blue
Actually really nice especially for the price
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Reviewed in the United States on November 9, 2025
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Rhonin
Phoenix, US
★★★★★ 5
Compact 5-in-1 Trimmer for Everyday Grooming
Color: Light Black
This 5-in-1 electric trimmer is designed to simplify personal grooming by combining several functions into one small device. The interchangeable heads make it possible to switch between different tasks such as trimming the bikini line, underarms, legs, or smaller facial areas. Changing attachments is straightforward, and the design keeps the process quick without needing multiple separate tools. The trimmer feels lightweight and easy to handle, which helps with maneuvering around different areas. During use, the blades glide smoothly and tend to feel gentle on the skin, making it suitable for routine grooming. The ergonomic shape also makes it comfortable to hold for longer sessions without feeling bulky. Another practical feature is the rechargeable cordless design. After charging, the battery typically lasts through multiple grooming sessions, which reduces the need for frequent charging. Because the device is compact, it fits easily into a travel bag or gym pouch, making it convenient for trips or daily use outside the home. Cleaning and maintenance are relatively simple as well. The detachable heads can be rinsed after use, and the waterproof capability allows the trimmer to be used in the shower if preferred. This makes it easier to keep the device hygienic without much effort. For people looking for a single grooming tool that can handle multiple areas while remaining portable and easy to maintain, this trimmer offers a practical and straightforward option for everyday personal care.
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Reviewed in the United States on March 10, 2026
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Tiffany
New York, US
★★★★★ 5
Thoughtful design with multiple useful attachments
Color: Light Black
Trying this 5-in-1 trimmer for a few days made it clear that the interchangeable heads are the main highlight. Each attachment has a clear purpose, so switching between trimming areas is straightforward and doesn’t require figuring out complicated settings. The motor runs quietly and the trimming action feels consistent without snagging hair. The body of the device is lightweight and comfortable to hold, which helps when working around smaller areas that need more control. Another detail I liked is the rechargeable design, since it removes the need for disposable batteries and keeps the device ready whenever needed. After charging, it lasted through several grooming sessions before the battery indicator suggested another charge. The detachable heads rinse clean easily, which makes maintenance simple and keeps everything hygienic. It’s a compact grooming tool that manages to combine several functions in one device without feeling overly complicated.
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Reviewed in the United States on March 13, 2026

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