WO2009157755A2 - Soil sensor - Google Patents
Soil sensor Download PDFInfo
- Publication number
- WO2009157755A2 WO2009157755A2 PCT/MY2009/000085 MY2009000085W WO2009157755A2 WO 2009157755 A2 WO2009157755 A2 WO 2009157755A2 MY 2009000085 W MY2009000085 W MY 2009000085W WO 2009157755 A2 WO2009157755 A2 WO 2009157755A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- soil
- sensor
- ion
- metal casing
- selective electrode
- Prior art date
Links
- 239000002689 soil Substances 0.000 title claims abstract description 32
- 239000000017 hydrogel Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 150000002500 ions Chemical class 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 8
- 235000015097 nutrients Nutrition 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001369 Brass Inorganic materials 0.000 claims 1
- 239000010951 brass Substances 0.000 claims 1
- 230000004224 protection Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 239000011343 solid material Substances 0.000 claims 1
- 239000013047 polymeric layer Substances 0.000 abstract description 6
- 235000021073 macronutrients Nutrition 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 5
- 230000005669 field effect Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 229920001600 hydrophobic polymer Polymers 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 poly(hydroxyethylmethacrylate) Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- NTBYNMBEYCCFPS-UHFFFAOYSA-N azane boric acid Chemical compound N.N.N.OB(O)O NTBYNMBEYCCFPS-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000002555 ionophore Substances 0.000 description 1
- 230000000236 ionophoric effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/333—Ion-selective electrodes or membranes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G01N33/245—
Definitions
- the present invention relates to a soil sensor for detecting and analysing soil macronutrients and more particularly to soil sensors using an ion-selective electrode.
- the contact between the soil sensors with soil over time will cause damage to the ion-selective electrode membrane.
- the ion-selective electrode membranes are protected from being directly in contact with the soil. The encapsulation should not compromise the capability of soil sensor to detect soil macronutrients.
- a soil sensor for detecting and analysing soil macronutrients such as nitrate, phosphate, potassium, calcium and magnesium is provided using ion- selective electrode (ISE) or ion-sensitive field effect transistor (ISFET).
- ISE ion- selective electrode
- ISFET ion-sensitive field effect transistor
- the apparatus comprising of porous metal casing (1), micro porous polymeric layer (2), conductive hydrogel (3), sensor module (4), preferably of ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell with ion-selective membrane hydrophobic polymer, electronics connection system (5) and printed circuit board (PCB) having readout (6).
- the electronics connection system (5) and the PCB with readout (6) are incorporated in a body casing (7) while the micro porous polymeric layer (2), conductive hydrogel (3) and sensor module (4) are incorporated in the porous metal casing (1).
- the body (7) is connected to porous metal casing tip (1).
- the sensor is buried into soil and is programmed to transmit data of the soil. Encapsulation of the ion-selective electrode membrane with a barrier is to prevent the ion-selective electrode membrane from physical damage.
- the barrier to protect the sensor is a combination of the conductive hydrogel (3) that in contact with the sensor module (4), micro porous polymeric layer (2) and a porous metal casing (1).
- Fig. 1-3 show a soil sensor for detecting and analysing soil macronutrients according to an embodiment of the present invention.
- the micro porous sensor casing (1) and the micro porous polymeric layer (2) are designed to let the soil solution pass through but filter the soil particles out from contaminating the conductive hydrogel (3) inside.
- the conductive hydrogel is designed as an ionic transport medium from micro porous polymer layer (2) to the sensor module.
- the hydrogel (3) is also to protect the sensor module from any damage when in direct contact with solids and to retain moisture level.
- the sensor cell (4) which has an ion selective electrode membrane is designed to detect and measure the soil nutrients.
- the sensor cell (4) preferably ion-sensitive field effect transistor (ISFET) or ion- selective electrode (ISE) sensor cell is placed inside the conductive hydrogel (3).
- ISFET ion-sensitive field effect transistor
- ISE ion- selective electrode
- a hydrophobic polymer containing ionophore for ion recognition purpose is applied on the sensor cell (4) .
- the electronics connection system (5) is designed to connect the sensor module (4) to the PCB with readout (6) are contained in a rod (7) while the micro porous polymeric layer (2), conductive hydrogel (3) and sensor module (4) are found in the porous metal casing (1).
- the metal casing (1) must be in contact with the soil to detect its nutrient level and /or composition.
- the soil sensor is programmable so that the data obtained from the soil could be transmitted to a database system for further analysing purposes.
- the invention relates to a method and apparatus for protecting soil sensor membrane comprising of a cylindrical porous metal casing (1) on the most outer part of the sensing part with pores of a diameter of about 0.5mm.
- the pores should be small enough to filter out the large soil particles in the solution from passing through the casing.
- the material of the casing is made of polyvinyl chloride (PVC) or stainless steel and should be robust enough to be buried in the soil.
- a micro porous polymer (2) is layered on the inside of the metal casing (1) and to act as a second fine filter.
- This filter is preferably a cellulose-based and free from ions as such it should be capable of adding or removing ions from the soil solution.
- the layer is arranged around a cylindrical shape object to form the shape, removed and adhered to the inner side of the metal casing (1).
- the liquid glue used to adhere the filter to the casing is then cured in the oven to harden. This filter must be easy to replace or reapplied on the casing.
- the inside of the micro porous polymer layer (2) is filled with the conductive hydrogel (3).
- the conductive hydrogel (3) acts as an ionic medium between the micro porous polymer layer (2) and the sensor module (4) and at the same time to protect the sensor module (4) from any damage if in direct contact with solid while retaining the moisture level inside the sensor casing (1).
- the conductive hydrogel (3) may be prepared from poly(hydroxyethylmethacrylate) or polyvinylpyrrolidone), 50%:50% glycerol in water and ammonium borate salt.
- the sensor cell (4) preferably an ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell is placed inside the conductive hydrogel (3).
- the sensor cell (4) is designed to detect and measure the level and composition of the soil nutrients.
- the sensor module (4) may be capable of detecting at least one of the following nutrients; nitrate, potassium, phosphate calcium and magnesium. Temperature and moisture sensors are may also be included in the sensor module (4) to obtain the soil physical information used for the compensation and error correction.
Abstract
An apparatus for detecting and analysing soil macronutrients using ion- selective electrode comprises a porous metal casing (1), micro porous polymeric layer (2), conductive hydrogel (3), sensor module (4), electronics connection system (5) and PCB with a readout circuit (6).
Description
Soil Sensor
Field of the Invention
The present invention relates to a soil sensor for detecting and analysing soil macronutrients and more particularly to soil sensors using an ion-selective electrode.
Background of the Invention
The contact between the soil sensors with soil over time will cause damage to the ion-selective electrode membrane. By encapsulating the soil sensor, the ion-selective electrode membranes are protected from being directly in contact with the soil. The encapsulation should not compromise the capability of soil sensor to detect soil macronutrients.
Summary of the Invention
A soil sensor for detecting and analysing soil macronutrients such as nitrate, phosphate, potassium, calcium and magnesium is provided using ion- selective electrode (ISE) or ion-sensitive field effect transistor (ISFET). The sensor is intended to be deployed in a plantation field. The sensor is packaged
The apparatus comprising of porous metal casing (1), micro porous polymeric layer (2), conductive hydrogel (3), sensor module (4), preferably of ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell with ion-selective membrane hydrophobic polymer, electronics connection system (5) and printed circuit board (PCB) having readout (6). The
electronics connection system (5) and the PCB with readout (6) are incorporated in a body casing (7) while the micro porous polymeric layer (2), conductive hydrogel (3) and sensor module (4) are incorporated in the porous metal casing (1). The body (7) is connected to porous metal casing tip (1).
The sensor is buried into soil and is programmed to transmit data of the soil. Encapsulation of the ion-selective electrode membrane with a barrier is to prevent the ion-selective electrode membrane from physical damage. In this invention the barrier to protect the sensor is a combination of the conductive hydrogel (3) that in contact with the sensor module (4), micro porous polymeric layer (2) and a porous metal casing (1).
Brief description of the Drawings
An embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawing, in which:
Fig. 1-3 show a soil sensor for detecting and analysing soil macronutrients according to an embodiment of the present invention.
Detailed Description of the Preferred Embodiment
The preferred embodiment of the present invention is illustrated in
Figures 1-3. The micro porous sensor casing (1) and the micro porous polymeric layer (2) are designed to let the soil solution pass through but filter the soil particles out from contaminating the conductive hydrogel (3) inside. The conductive hydrogel is designed as an ionic transport medium from micro porous polymer layer (2) to the sensor module. The hydrogel (3) is also to
protect the sensor module from any damage when in direct contact with solids and to retain moisture level. The sensor cell (4) which has an ion selective electrode membrane is designed to detect and measure the soil nutrients. The sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion- selective electrode (ISE) sensor cell is placed inside the conductive hydrogel (3). A hydrophobic polymer containing ionophore for ion recognition purpose is applied on the sensor cell (4) . The electronics connection system (5) is designed to connect the sensor module (4) to the PCB with readout (6) are contained in a rod (7) while the micro porous polymeric layer (2), conductive hydrogel (3) and sensor module (4) are found in the porous metal casing (1). To deploy, at least the metal casing (1) must be in contact with the soil to detect its nutrient level and /or composition.
The soil sensor is programmable so that the data obtained from the soil could be transmitted to a database system for further analysing purposes.
The invention relates to a method and apparatus for protecting soil sensor membrane comprising of a cylindrical porous metal casing (1) on the most outer part of the sensing part with pores of a diameter of about 0.5mm. The pores should be small enough to filter out the large soil particles in the solution from passing through the casing. Preferably, the material of the casing is made of polyvinyl chloride (PVC) or stainless steel and should be robust enough to be buried in the soil.
A micro porous polymer (2) is layered on the inside of the metal casing (1) and to act as a second fine filter. This filter is preferably a cellulose-based and free from ions as such it should be capable of adding or removing ions from the soil solution. To apply the micro porous layer inside the metal casing (1), the layer is arranged around a cylindrical shape object to form the shape, removed and adhered to the inner side of the metal casing (1). The liquid glue used to adhere the filter to the casing is then cured in the oven to harden. This filter must be easy to replace or reapplied on the casing.
The inside of the micro porous polymer layer (2) is filled with the conductive hydrogel (3). The conductive hydrogel (3) acts as an ionic medium between the micro porous polymer layer (2) and the sensor module (4) and at the same time to protect the sensor module (4) from any damage if in direct contact with solid while retaining the moisture level inside the sensor casing (1). The conductive hydrogel (3) may be prepared from poly(hydroxyethylmethacrylate) or polyvinylpyrrolidone), 50%:50% glycerol in water and ammonium borate salt.
The sensor cell (4), preferably an ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell is placed inside the conductive hydrogel (3). The sensor cell (4) is designed to detect and measure the level and composition of the soil nutrients. At a time, the sensor module (4) may be capable of detecting at least one of the following nutrients; nitrate, potassium, phosphate calcium and magnesium. Temperature and moisture sensors are may also be included in the sensor module (4) to obtain the soil physical information used for the compensation and error correction.
Claims
1. An apparatus for detecting soil nutrient comprising a protective porous metal casing made of metal preferably stainless steel or brass.; a microporous layer to protect ion-selective electrode membrane and to filter out solid materials; a conductive hydrogel filling materials inside the metal casing to transport ions and maintain moisture level inside the sensor tip; and a circuit for reading data obtained by the apparatus.
2. The apparatus for detecting soil nutrient according to claim 1 wherein the data may be transmitted to a database system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI20082367 | 2008-06-27 | ||
| MYPI20082367A MY145172A (en) | 2008-06-27 | 2008-06-27 | Soil sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2009157755A2 true WO2009157755A2 (en) | 2009-12-30 |
| WO2009157755A3 WO2009157755A3 (en) | 2010-04-08 |
Family
ID=41445130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/MY2009/000085 WO2009157755A2 (en) | 2008-06-27 | 2009-06-26 | Soil sensor |
Country Status (2)
| Country | Link |
|---|---|
| MY (1) | MY145172A (en) |
| WO (1) | WO2009157755A2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013050387A1 (en) * | 2011-10-04 | 2013-04-11 | Schunk Wien Gesellschaft M.B.H. | Sensor module and electrode for a sensor module |
| GB2509127A (en) * | 2012-12-21 | 2014-06-25 | Plant Bioscience Ltd | Soil chemistry sensor |
| WO2015042181A2 (en) | 2013-09-18 | 2015-03-26 | Suprasensor Technologies, Llc | Molecular receptor-based chemical field-effect transistor (chemfet) devices, systems, and methods for in-situ nitrate monitoring in field soils |
| WO2016182885A3 (en) * | 2015-05-08 | 2017-02-16 | Suprasensor Technologies, Llc | Apparatus for determining nitrate levels, and method for measuring ion concentration with a standard deviation correction |
| CH712184A1 (en) * | 2017-06-28 | 2017-09-15 | Plantcare Ag | Apparatus and method for in-situ investigation of the fertilizer content of plant growth substrates. |
| EP3225978A4 (en) * | 2014-11-26 | 2018-05-30 | Universitat Autònoma de Barcelona | Probe for the continuous monitoring in real time of chemical parameters of interest directly in the ground, and system for the continuous monitoring in real time of said chemical parameters of interest |
| WO2019002337A1 (en) | 2017-06-28 | 2019-01-03 | Plantcare Ag | Devices and methods for examining plant growth substrates |
| US10866208B2 (en) * | 2018-09-21 | 2020-12-15 | Teralytic, Inc. | Extensible, multimodal sensor fusion platform for remote, proximal terrain sensing |
| CN109507244B (en) * | 2018-12-04 | 2021-06-08 | 南通大学 | Wireless detection system for heavy metal content in soil |
| WO2021244897A1 (en) * | 2020-06-04 | 2021-12-09 | Plantcare Ag | Moisture measuring device having an antibacterial effect |
| WO2023154326A1 (en) * | 2022-02-09 | 2023-08-17 | Instrumentation Laboratory Company | Sensor for measuring ionized magnesium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179347A (en) * | 1992-04-10 | 1993-01-12 | Irrometer Company, Inc. | Electrical sensor for sensing moisture in soils |
| US20040195098A1 (en) * | 1999-06-08 | 2004-10-07 | Broadley Scott T. | Reference electrode having a flowing liquid junction and filter members |
| JP2005077252A (en) * | 2003-09-01 | 2005-03-24 | Horiba Ltd | Comparing electrode and ion concentration meter |
| JP2006090785A (en) * | 2004-09-22 | 2006-04-06 | Central Res Inst Of Electric Power Ind | Self-support type marine carbon dioxide partial pressure sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729938A (en) * | 1980-07-30 | 1982-02-18 | Toshiba Corp | Ion selective electrode |
-
2008
- 2008-06-27 MY MYPI20082367A patent/MY145172A/en unknown
-
2009
- 2009-06-26 WO PCT/MY2009/000085 patent/WO2009157755A2/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179347A (en) * | 1992-04-10 | 1993-01-12 | Irrometer Company, Inc. | Electrical sensor for sensing moisture in soils |
| US20040195098A1 (en) * | 1999-06-08 | 2004-10-07 | Broadley Scott T. | Reference electrode having a flowing liquid junction and filter members |
| JP2005077252A (en) * | 2003-09-01 | 2005-03-24 | Horiba Ltd | Comparing electrode and ion concentration meter |
| JP2006090785A (en) * | 2004-09-22 | 2006-04-06 | Central Res Inst Of Electric Power Ind | Self-support type marine carbon dioxide partial pressure sensor |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103975238B (en) * | 2011-10-04 | 2017-04-05 | 维也纳顺克股份有限公司 | Sensor assembly and the electrode for sensor assembly |
| CN103975238A (en) * | 2011-10-04 | 2014-08-06 | 维也纳顺克股份有限公司 | Sensor module and electrode for a sensor module |
| WO2013050387A1 (en) * | 2011-10-04 | 2013-04-11 | Schunk Wien Gesellschaft M.B.H. | Sensor module and electrode for a sensor module |
| US9535184B2 (en) | 2011-10-04 | 2017-01-03 | Schunk Wien Gesellschaft M.B.H. | Sensor module and electrode for a sensor module |
| EP2764358B1 (en) * | 2011-10-04 | 2017-07-12 | Schunk Wien Gesellschaft M.b.H. | Sensor module |
| GB2509127A (en) * | 2012-12-21 | 2014-06-25 | Plant Bioscience Ltd | Soil chemistry sensor |
| WO2014096844A1 (en) * | 2012-12-21 | 2014-06-26 | Plant Bioscience Limited | Soil chemistry sensor |
| CN104884947B (en) * | 2012-12-21 | 2018-01-09 | 植物生物科学有限公司 | Soil chemistry sensor |
| CN104884947A (en) * | 2012-12-21 | 2015-09-02 | 植物生物科学有限公司 | Soil chemistry sensor |
| GB2509127B (en) * | 2012-12-21 | 2015-09-30 | Plant Bioscience Ltd | Soil chemistry sensor |
| US9733206B2 (en) | 2012-12-21 | 2017-08-15 | Plant Bioscience Limited | Soil chemistry sensor |
| US9281219B2 (en) | 2013-09-18 | 2016-03-08 | Suprasensor Technologies, Llc | Molecular receptor-based chemical field-effect transistor (CHEMFET) devices, systems, and methods for in-situ nitrate monitoring in field soils |
| EP3058359A4 (en) * | 2013-09-18 | 2017-07-05 | Suprasensor Technologies, LLC | Molecular receptor-based chemical field-effect transistor (chemfet) devices, systems, and methods for in-situ nitrate monitoring in field soils |
| US9535031B2 (en) | 2013-09-18 | 2017-01-03 | Suprasensor Technologies, Llc | Molecular receptor-based chemical field-effect transistor (CHEMFET) devices, systems, and methods for in-situ nitrate monitoring in field soils |
| CN105960592A (en) * | 2013-09-18 | 2016-09-21 | 苏普拉传感器技术有限责任公司 | Molecular receptor-based chemical field-effect transistor |
| WO2015042181A2 (en) | 2013-09-18 | 2015-03-26 | Suprasensor Technologies, Llc | Molecular receptor-based chemical field-effect transistor (chemfet) devices, systems, and methods for in-situ nitrate monitoring in field soils |
| EP3225978A4 (en) * | 2014-11-26 | 2018-05-30 | Universitat Autònoma de Barcelona | Probe for the continuous monitoring in real time of chemical parameters of interest directly in the ground, and system for the continuous monitoring in real time of said chemical parameters of interest |
| AU2015352385B2 (en) * | 2014-11-26 | 2021-06-24 | Universitat Autonoma De Barcelona | Probe for the continuous monitoring in real time of chemical parameters of interest directly in the ground, and system for the continuous monitoring in real time of said chemical parameters of interest |
| US10578579B2 (en) | 2014-11-26 | 2020-03-03 | Universitat Autonoma De Barcelona | Probe for the continuous monitoring in real time of chemical parameters of interest directly in the ground and system for the continuous monitoring in real time of said chemical parameters of interest |
| AU2016261226B2 (en) * | 2015-05-08 | 2020-09-17 | Climate Llc | Apparatus for determining nitrate levels, and method for measuring ion concentration with a standard deviation correction |
| WO2016182885A3 (en) * | 2015-05-08 | 2017-02-16 | Suprasensor Technologies, Llc | Apparatus for determining nitrate levels, and method for measuring ion concentration with a standard deviation correction |
| US10578599B2 (en) | 2015-05-08 | 2020-03-03 | Suprasensor Technologies, Llc | System, apparatus, and method for measuring ion concentration with a standard deviation correction |
| CH712184A1 (en) * | 2017-06-28 | 2017-09-15 | Plantcare Ag | Apparatus and method for in-situ investigation of the fertilizer content of plant growth substrates. |
| WO2019002337A1 (en) | 2017-06-28 | 2019-01-03 | Plantcare Ag | Devices and methods for examining plant growth substrates |
| US10866208B2 (en) * | 2018-09-21 | 2020-12-15 | Teralytic, Inc. | Extensible, multimodal sensor fusion platform for remote, proximal terrain sensing |
| CN109507244B (en) * | 2018-12-04 | 2021-06-08 | 南通大学 | Wireless detection system for heavy metal content in soil |
| WO2021244897A1 (en) * | 2020-06-04 | 2021-12-09 | Plantcare Ag | Moisture measuring device having an antibacterial effect |
| WO2023154326A1 (en) * | 2022-02-09 | 2023-08-17 | Instrumentation Laboratory Company | Sensor for measuring ionized magnesium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009157755A3 (en) | 2010-04-08 |
| MY145172A (en) | 2011-12-30 |
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