Home  
About
Managers
Board
Values
Awards
Careers
  Solutions  
Environmental
Farming
Landscape
Research
  Products and Services  
Product Overview
Compare Products
Sensors
Continuous Monitoring
Data Retrieval
Portable Monitoring
Software
Installation Tools
SoluSAMPLER
Calibration
Specifications
  Advantages  
Proven Research Solution
Proven Farming Solution
Measurement of Soil Water and Salinity
Fully Field Serviceable
Customised Sensor Depths
Site and Data Integrity
Site Calibration
Reliability
Hardware and Software Flexibility
  Downloads     Case Studies     Support  
Remote Support / Meeting
Sentek Forum
Distributors
Downloads
FAQ's
Version Tables
Terms and Conditions
2 Year Warranty
6 Month Warranty
Calibration Manual (PDF)
Reference (PDF)
Calibration Table
  Contact     Where To Buy  
Sentek Forum Distributor Webstore
Products and Services    

Product Overview Compare Products Sensors Soil Moisture TriSCAN Continuous Monitoring EnviroSCAN probes Single Point Sensor Drill & Drop probes Data Retrieval Sentek Solo Sentek Plus Sentek All-in-One Sentek Compact Sentek Multi Sentek RT6 3rd Party Portable Monitoring Software IrriMAX IrriMAX Live Installation Tools SoluSAMPLER Calibration Specifications
Calibration

Sentek provides default calibration equations for Soil Moisture sensors that convert raw counts into estimates of soil volumetric water content. These default calibration equations have been calculated based on a range of different soil types and which can be used to show relative soil water changes in all soil types. Significant numbers of data sets collected from various soil types and crops around the world have shown that relative changes in volumetric soil water content based on the default calibration equation can be used to show the most important soil water trends in relation to optimum plant production. Almost all of the economic gains recorded with Sentek probes in commercial agriculture to date have been made using the concept of relative change in soil water dynamics.

Obtaining absolute volumetric soil water content data is useful however, for scientific studies of the soil-water-plant-atmosphere continuum, and for other purposes where it is necessary to determine absolute values of soil water content. For these applications calibration of the Soil Moisture Sensors is essential.

Calibration of Sentek's soil moisture sensors is made by comparing Scaled Frequency readings from an access tube installed in the field or in a container in the laboratory with values of the volumetric water content. Volumetric water content is determined by gravimetric sampling and bulk density determination from immediately adjacent to the tube. When these values are plotted on a graph they form a relationship that is described by a mathematical equation. In this way the readings from the sensor are directly related to real values determined in the soil.

Click here to download the EnviroSCAN and Diviner 2000 Installation Manual.



Gravimetric sampling

Site and soil specific calibration equations can be applied to individual sensors at every depth level measured.
For more information, click here to download the Sentek Calibration Manual.


Example comparison of soil water data determined using default Sentek equation and site specific calibration equation, showing relative trends over time.


Home
About
Managers
Board
Values
Awards
Careers
Solutions
Environmental
Farming
Landscape
Research
Products and Services
Product Overview
Sensors
Continuous Monitoring
Sentek Solo
Sentek Plus
Sentek All-in-One
Sentek Compact
Sentek Multi
Sentek RT6
3rd Party
Portable Monitoring
Software
IrriMAX
IrriMAX Live
Installation Tools
SoluSAMPLER
Calibration
Specifications
Advantages
Proven Research Solution
Proven Farming Solution
Measurement of Soil Water and Salinity
Fully Field Serviceable
Customised Sensor Depths
Site and Data Integrity
Site Calibration
Reliability
Ultimate Flexibility
Support
Remote Support / Meeting
Sentek Forum
Distributors
Downloads
FAQ's
Version Tables
Terms and Conditions
2 Year Warranty
6 Month Warranty
Calibration Manual (PDF)
Reference (PDF)
Calibration Table
Contact
Where To Buy
Downloads
Case Studies
Sentek Forum

Copyright © 1991-2017 Sentek - All rights reserved | Privacy Policy