SKU: 66109259285
watermark soil moisture meter

watermark soil moisture meter Soil moisture tension sensor (Watermark)

Sale price$24.07 Regular price$26.75
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 14 - Jul 19

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

watermark soil moisture meter Soil moisture tension sensor (Watermark)Product info This soil moisture tension sensor consists of three Watermark sensors, an NTC temperature sensor and a Crodeon Watermark adapter with M12 cable. This combination allows you to measure soil moisture at different heights or in different locations for increased accuracy. The Watermark adapter by Crodeon is a small electronic sensor adapter that reads and calibrates three Watermark sensors with an NTC soil temperature sensor using the formula

Product info

This soil moisture tension sensor consists of three Watermark sensors, an NTC temperature sensor and a Crodeon Watermark adapter with M12 cable. This combination allows you to measure soil moisture at different heights or in different locations for increased accuracy.

The Watermark adapter by Crodeon is a small electronic sensor adapter that reads and calibrates three Watermark sensors with an NTC soil temperature sensor using the formula developed by Dr. Clinton C. Shock in 1998.

The Watermark adapter uses high quality pseudo-AC excitation as specified by the manufacturer Irrometer (source: www.irrometer.com/200ss.html) to extend the life of the sensor and optimize the accuracy of the readings.

The readings of the Watermark are expressed in kilopascals. A higher reading means the soil is dry and plants therefore have to make more effort to extract water from the soil. Use the following readings as a general guideline:

  • 0-10 kPa: Saturated soil
  • 10-30 kPa: Soil is adequately wet (except coarse sands, which are beginning to lose water)
  • 30-60 kPa: Usual range for irrigation (most soils)
  • 60-100 kPa: Usual range for irrigation in heavy clay
  • 100-200 kPa: Soil is becoming dangerously dry for maximum production. Proceed with caution!

Reporter reads the calibrated soil moisture and soil temperature values in real-time using a waterproof M12 cable. This means only one connector on your Reporter is used to read 3 Watermarks and 1 soil temperature sensor.

The M12 cable can be extended up to 30m using M12 extension cords. Multiple Watermark adapters can be plugged into one Reporter or combined with other sensors in our shop. The Watermark adapter is designed for low power consumption so it can perfectly work with your solar powered Reporter.

Patented Watermark sensor

Over the last four decades, the Watermark soil moisture tension sensor has been the preferred choice of growers, irrigation experts and researchers alike for providing the most affordable, simple and reliable measurement of available soil water.

The Watermark soil moisture sensor acts as an artificial root, exchanging water with the surrounding soil as a plant does. This exchange enables measurement of how much effort (suction or soil water tension) is required by a plant to extract water that is available from the soil, not just what the moisture percentage of the soil may be. Measuring this soil water tension provides reliable data for irrigation scheduling, without requiring complicated calibrations for individual sites and different soils.

Comparing the Watermark sensor to the SM100

Both the SMT100 and the Watermark sensor measure soil moisture. However, there are some differences that we can point out. The SMT100 measures the soil moisture content as a percentage of the soil volume, whereas the Watermark sensor actually measures how much effort is required by a plant to extract water that is available from the soil.

For a full comparison between these sensors, read our blog post on this topic.

Installation

Before installing the sensors, make sure to follow this procedure in order to improve the sensor response in the first few irrigations.

Soak the sensors overnight in irrigation water. Always install a wet sensor. If time permits, slowly wet the sensor by partially submerging (no more than half way) for 30 minutes in the morning and let dry until evening, wet for 30 minutes, let dry overnight, wet again for 30 minutes the next morning and let dry until evening. Soak over the next night and install wet. This will improve the sensor response in the first few irrigations. 

If the Watermark sensors are mounted on a pvc pipe, make sure the hole you're drilling in the ground has the same diameter as the pipe (not larger).

Crodeon Cloud

All measurement data is streamed to the Crodeon Dashboard in realtime. These measurement logs can be viewed live or historical data can be exported for more detailed reports. 

The Dashboard is also the place to change alarm settings or other Reporter settings like measurement interval.

Soil moisture tension sensor with API

Reporter comes with a rest API that you can connect to your own systems and software for easy data integration. For example, to automate a sprinkler system for when the sensor detects lack of moisture in the soil.

Physical properties

For more detailed instructions about using and maintaining the Watermark sensor, please refer to the documentation from the manufacturer: Download manual.

Weight (adapter) 95 g
Width (adapter) 105 mm
Height (adapter) 40 mm
Depth (adapter) 70 mm
Cable length (M12) 5 m
Cable length (Watermarks) 2 m
Cable length (NTC temp.) 3 m
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: 66109259285

Discover Niche Categories That Outsell watermark soil moisture meter

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 443 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
K
Verified Purchase
KLCV
Grantham, US
★★★★★ 5
Excellent product
Color: Grey, Size: 1 Large Panel
This room separator is really nice. And really easy to assemble. Sturdy-provides nice privacy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
H
Verified Purchase
Havanafayre
Houston, US
★★★★★ 4
Functional not durable
Color: Grey, Size: 1 Large Panel
When first assembled, it looked exactly like the picture. However, over time, the top bar has begun to bow. The metal bars are weaker than I expected. It is still doing it's job providing privacy but the quality is not quite up to par. The height, color, and functionality are all exactly as described. If you need an inexpensive room divider, this is a great option. I don't expect it to last more than a year or two, but I would still recommend this product for those needing something fast, easy to assemble, and don't need for an extended period of time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2024
M
Verified Purchase
Megan
New York, US
★★★★★ 1
Difficult Assembly and Very Unstable
Extremely difficult to assemble. It seems like the metal wasn't cut well. Some things screw right in, while others will make your hands raw trying. It is true to size, which is great, aside from the fact that with how hard it is to build, disassembling and reassembling for storage would be a nearly impossible task, and it's extremely hard to tuck away anywhere fully built with the size and feet on the bottom. It's also pretty unstable and doesn't stand fully straight, which is a little nerve wracking with pets in the room. I am dreading dissassembling this thing to return it once I have something to replace it, but trust that I will be ASAP.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
M
Verified Purchase
Mike
New York, US
★★★★★ 1
Didn’t come with all the Parts - Essentially Worthlist Return in process. Huge inconvenience
Product came with everything but the rubber pads that receives the screws so it’s essentially worthless upon arrival. Now I have to go out of my way to go to UPS to send it back and process a return which will take 7 business days until I can receive a refund. I was excited for this package too what a complete let down !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 31, 2025
J
Verified Purchase
jackelin mojica
Lexington, US
★★★★★ 1
Is not good color is not like the picture
This very loosely very complicated is a two person job not worth the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026

recommand products