SenBoxPlant physiological and ecological monitoring platform

the NetherlandsSendotThe company has launchedSenBoxThe plant physiological and ecological monitoring system is an online monitoring system based on a cloud platform, which can continuously monitor the photosynthetic efficiency, photosynthetically active radiation, chlorophyll fluorescence, chlorophyll content, and soil of plants for a long timepHIndicators such as values and soil oxygen concentration can track the physiological and ecological changes of plants in real-time anywhere in the world, making it particularly suitable for research in fields such as farmland and greenhouse cultivation.

sensor type

• Plant photosynthetic efficiency sensor

• Photosynthetically active radiation sensor

• Chlorophyll fluorescence sensor

• Chlorophyll content sensor

• Blade temperature sensor

• soilpHsensor

• Soil oxygen sensor

System Characteristics

1.The system is designed based on a cloud platform, and users can easily install the software platform for remote viewing and downloading of data.

2.Users can remotely set up sensors, including information such as collection time and notes. To view the connected sensors, click on the menu[sensor]（Sensors）View.

3.The measurement results can be viewed and downloaded at any time, and online data graphical analysis and comparison are provided for users to compare and analyze.

Origin and manufacturer: NetherlandsSendot

FluoMini EFF portable plant photosynthetic efficiency meter

FluoMini EFFThe portable plant photosynthetic efficiency meter can quickly and accurately measure the photosynthetic efficiency of plants. due toFluoMini EFFEquipped with NetherlandsSendotThe company's innovative fiber optic sensor allows accurate measurement by simply installing the blade clamp on the blade. This photosynthetic efficiency meter has a recording function and can perform uninterrupted measurements for several weeks in the field or indoors.FluoMini EFFThe portable plant photosynthetic efficiency meter is equipped with photosynthetically active radiation（PAR）Sensors that can simultaneously measure the photosynthetic efficiency andPARIntensity provides decision-making basis for researchers and crop growers to create suitable planting environments.

main features

• Using fiber optic sensors for accurate and convenient measurement;

• Can continuously monitor and record photosynthetic data for several weeks;

• Simultaneously measuring the photosynthetically active radiation of leavesPAR；

• Equipped with a rechargeable lithium battery, the instrument can work for several weeks;

• Assist growers in creating optimal growth conditions for their plants.

Parameters

1. Measurement range (photosynthetic efficiency): 10-90%;

2.Measurement range (photosynthetically active radiation, optional):0 - 2000 umol/m2.s (±10%)；

3.Working temperature:5 - 45 ℃；

4.Sampling time: Approximately1 s；

5.Connection (handheld):USB；

6.Measurement probe:1Fiber optic blade clamp;

7.Protection level:IP53；

8.Connection (analog type):4-20mAOutput（3Thread);

9.Size（l×b×h, Unitmm）：169×62×25；

10.Shell material: aluminum,ABSPlastic film covering;

11.Connector:4needleM5Public head;

12.Power supply voltage:USBPort（5V，< 200 mA），

Simulated type12 -24 Vhand over/DC power supply;

13.Battery life:48 h（5Second interval);2Week（60Second interval);

14.Storage space:2G.

Basic configuration

Instrument host; Fiber optic sensor; Blade clamp;2riceUSBConnecting line; Software and manualsUPlate; suitcase.

Application Cases

case1. giveLi-COR 6400Comparison of measurement of portable photosynthetic apparatus

The most commonly used field in plant photosynthesis research currently isLi-CORThe company's LI-6400 photosynthesis analyzer. The comparative experimental results show that,LI-6400giveFluoMini EFFThe measurement results are very close, and the variation pattern of the measurement values is highly consistent when the measurement environment changes, which fully demonstrates thatFluoMini EFFThe accuracy of plant photosynthetic efficiency meter. In addition,FluoMini EFFIt has higher portability and ease of operation, as well as good cost-effectiveness.FluoMini EFFIt can also perform uninterrupted photosynthetic measurements for several weeks, making it more applicable. The following figure shows partial results of the comparative experimental measurements:

Case 2. Monitoring of Photosynthetic Efficiency in Phalaenopsis Orchids

Phalaenopsis is a species with a pathway for the metabolism of Sedum acid（CAM）Ornamental plants. Researchers utilizeFluoMini EFFThe plant photosynthetic efficiency meter was used to measure the diurnal variation of photosynthesis in Phalaenopsis, and additional light was added during specific time periods to study itCAMThe special response of plant photosynthesis is as follows:

FluoMini pHPortable OpticspHMeasuring instrument

FluoMini pHPortable OpticspHThe measuring instrument is based onSendotThe principle of fiber optic spectroscopy measurement developed by the companypHdetermination. Unlike traditional electrode measurement principles, this measuring instrument is insensitive to drift height and requires almost no calibration of the sensor. Ionic strength and temperature have almost no effect on the measurement, so they can also be applied to low conductivity solutions. This instrument is an ideal device for laboratory and field applications.

main features

• Using the principle of fiber optic spectroscopy, the measurement is accurate and drift free;

• Can be directly used for soil solution measurement or hydroponic solution measurement;

• Unique design of non-invasive measurement, the probe can measure without inserting into the solution;

• The sensor is equipped with a metal protective cover, which is sturdy, durable, and easy to maintain.

• The data storage capacity is large, and it can be continuously monitored and recorded in the short or long term.

Basic configuration

Instrument host; optical fiberpHSensor (with metal protective cover);2riceUSBConnecting line; Software and manualsUPlate; suitcase.

optionalNon invasive optical fiberpHSensor with10A reflective label.

Application Cases

Rhizosphere region of plantspHResearch on the Nutritional Status of Plants

Rhizosphere region of plantspHValue is an important factor affecting plant nutrient absorption. The optimal nutrient absorptionpHValue between5and6between. Professional growers will be responsible for water supply and drainagepHMeasure, but through drainagepHThe value can only be obtained from the matrixpHThe changes in the average value cannot reflect the rhizosphere environment of plantspHReal time changes in values. rhizospherepHThe determination of values is more representative for indicating changes in the rhizosphere condition of plants. This also provides researchers with new directions that will be more conducive to irrigation andpHAdjusting strategies for improvement to promote plant growth. The following image isFluoMini pHActual measurement results:

Parameters

1. pH measurement range: 3.0-8.5;

2.Working temperature:5 - 45 ℃；

3.Accuracy（pH）：

Range（3.5 - 4.0）—0.2 pH；

Range（4.0 - 7.0）—0.1 pH；

Range（7.0 - 8.0）—0.2 pH；

4.Measurement time:< 2 s(Frequency)> 1.25 Hz）；

5.Calibration:1to2Point;

6.Coating lifespan:40Ten thousand measurements;

7.Connection (Handheld)/Simulation type):USB/4-20mA；

8.Output（3Threads),12 - 24 V AC/DC；

9.Resolution（pH）：0.01 pH；

10. Response time（T90）：< 30 s；

11. Drift/Stability (pH):

range(3.5 - 4.0 / 7.0 - 8.0)—< 0.2Monthly;

Range（4.0 - 7.0）— < 0.1Monthly;

12.Power supply voltage: throughUSBPort（5V，< 200 mA）；

13.Size（l* b*h, Unitmm）：169*62*25；

14.Weight (unit)g）：235；

15.Shell material: aluminum,ABSPlastic film covering;

16.Probe material: stainless steel, outer diameter6 mm, Length100 mm；

17.Connector:4needleM5Public head;

18.Data connection:USBSerial interface;

19.Protection level:IP53；

20.Battery life:48 h（5Second interval);2Zhou（60Second interval).

Origin and manufacturer: NetherlandsSendot

FluoMini O₂Portable oxygen/temperature measuring instrument

FluoMini O₂The portable optical oxygen/temperature measuring instrument is designed based on the principle of fluorescence quenching. The optical sensing coating of its sensor consists of two parts, one for measuring temperature and the other for measuring oxygen. The temperature measurement value can be used for temperature compensation of oxygen measurement. This technology can be used in enclosed, non stirred environments. The instrument adopts embedded components to achieve temperature compensation, which is not affected by response time differences, enabling the sensor to be used in rapidly changing environments.

main features

• Designed based on the principle of fluorescence quenching, with accurate measurement and easy maintenance;

• Can measure oxygen in the air and dissolved oxygen in water, while also measuring temperature;

• Can directly measure the soil oxygen content and temperature in the rhizosphere area of plants;

• Used to evaluate seed quality and the optimal harvest period for seeds;

• The sensor is equipped with a metal protective cover, which is sturdy, durable, and has a long lifespan;

• The data storage capacity is large, and it can be continuously monitored and recorded in the short or long term.

Basic configuration

Instrument host; Optical Oxygen/Temperature sensor (with metal protective cover); 2riceUSBConnecting line; Software and manualsUPlate; Sensor bracket; Wooden hole digging tool; suitcase.

optional：Non invasive optical oxygen/Temperature sensor with10A reflective label.

Parameters

1. O in gas₂Measurement range: 0-40% Vol (standard condition);

2.dissolve separateO₂Measurement range:0 - 18 ppm(Standard condition);

3.in the waterO₂Saturation measurement range:0 - 200%(Standard condition);

4.Working temperature:5 - 45 ℃；

5.Working pressure:0 - 1.5 barAbsolute pressure;

6.accuracy/Resolution（O₂）：

Range（0% - 1%）—0.1% / 0.01%；

Range（1% - 25%）—0.2% / 0.01%；

Range（25%Above) - The measured values0.1% / 0.01%；

7.accuracy/Resolution (temperature, pressure):

Temperature - 1℃/ 0.1℃；

Pressure -5 mBar / 1 mBar；

8. Accuracy (dissolved O)₂）：

Range（0 - 1 ppm）— 0.01 ppm；

Range（1 ppmAbove) - The measured values0.1%；

9. Accuracy/Resolution (O in water)₂Saturation):

Range（0 - 10%）— 0.1% / 0.01%；

Range（10%Above) - The measured values0.1% / 0.1%；

10. Response time:

Gas: T90<5 s;

Liquid:< 60 s(depending on the flow rate);

11. Temperature compensation: Yes ；

12. Drift/Stability:

O₂（< 1%）：< 0.1%Monthly (work frequency)0.1Hz）；

O₂(1% - 25%)：< 0.2%Monthly (work frequency)0.1Hz）；

O₂（> 25%）：< 2%Monthly (work frequency)0.1Hz）；

13. DissolutionO₂：< 0.2 ppmMonthly;

14. Sampling time:< 2 s；

15.calibrationO₂：1Point or2Point; Temperature:1Point;

16. Coating life: 6 months to 1 year; Or 500000 measurements (excluding the influence of chemical incompatibility);

17. Digital interface: USB;

18.signal output：USBSerial interface;

19. Dimensions (l × b × h, in millimeters): 169 × 62 × 25;

20. Weight (in grams): 235;

21. Shell material: aluminum, ABS plastic coated;

22. Connector: 4-pin M5 male connector;

23. Pressure sensor tube (optional): 316 stainless steel, outer diameter 2mm, length 15mm;

24. Protection level: IP54;

25. Power supply voltage: via USB port (5V,<200 mA);

26. Battery life: 48 hours (5-second interval); 2 weeks (60 second interval).

Application Cases

case1. Rhizosphere during strawberry cultivationO₂optimization strategy

The rhizosphere environment of plants is crucial for their growth and disease resistance. The rhizosphere water and nutrients of plants should be optimally adjusted according to their needs. rhizosphericO₂The level largely determines the efficiency of plant nutrient uptake, water absorption, and root quality. Suitable in the rhizosphere environmentO₂The content can ensure the healthy growth of plant roots, making them more resistant to pathogenic microorganisms. Adequate in the matrixO₂It can also minimize the possibility of anaerobic conditions and reduce the risk of infection by pathogenic microorganisms.

Under normal growth control strategies, researchers studied the rhizosphere of strawberriesO₂Monitoring of conventional climate parameters was conducted for several months. The results indicate that maintaining a highO₂Content is crucial for maintaining optimal water content and electrical conductivity in the rhizosphere region of plants（EC）It is crucial. Light level, irrigation amount, and rhizosphereO₂The content has a clear correlation, and these parameters can be used to improve the rhizosphere of plantsO₂The basis for adjusting the content level and irrigation strategy.

case2. Root zone during chili cultivationO₂monitor

O in the planting substrate that is not suitable for plant growth₂The level of content may lead to a reduction in crop yield, O₂When the content is extremely low, it is more likely to cause plant diseases. As shown in the following figure, in some cases, the rhizosphere O₂Reducing the content to zero will lead to crop yield reduction and weakened plant disease resistance. This risk can be reduced by optimizing the substrate environment and water supply strategy.

FluoMini O from Sendot in the Netherlands₂Portable optical oxygen/temperature measuring instrument can directly measure oxygen in porous substrates or soils₂The content was accurately measured for several consecutive weeks, and the measurement results are shown in the following figure:

case3. Oxygen temperature monitoring and storage strategy during plant seed storage process

Oxidation rate is an indicator of seed quality, and reflective label paper (used for FluoMini O)₂Non contact measurement O₂Seal the dried seeds in a small bottle and isolate them from external oxygen to determine their oxygen consumption at room temperature. In addition, aging acceleration testing can also be conducted at high temperatures.

The following figure shows the installation at different temperatures20The process of reducing oxygen in a closed glass bottle containing seeds. The oxygen consumption at room temperature is approximately40 ug/gDry seeds,40℃When, the consumption is160 ug/gDry seeds, these measurements provide a basis for evaluating seed quality and making decisions on the optimal seed storage strategy.

Origin and manufacturer: NetherlandsSendot

FluoMini CFPortable chlorophyll fluorescence analyzer

FluoMini CFPortable chlorophyll meter used in the NetherlandsSendotThe blue modulation pulse launched by the companyLEDLight measurement of chlorophyll fluorescence in plant leaves, algae, seeds, etc; In addition, the instrument can also convert the measured fluorescence value into the chlorophyll content of the plant. This instrument has a unique design and high sensitivity, making it an ideal tool for measuring the fluorescence characteristics and chlorophyll content of plant leaves, seeds, algae, and chlorophyll containing substances in indoor or field experiments.

main features

• Designed based on the principle of fluorescence spectroscopy, with accurate measurement and easy maintenance;

• Can measure chlorophyll fluorescence parameters of plant leaves, seeds, algae, etc;

• Calculate the chlorophyll content of plants directly based on the measured fluorescence parameters;

• There are two sensor specifications to choose from, namely1mmand6mm；

• It can be measured separately or continuously monitored for a long time, with a maximum of several weeks of continuous monitoring.

Parameters

1. Measurement range: 0-10 mg/g;

2. Working temperature: 5-45 ℃;

3. Accuracy (CF):

Range（0 - 1 mg/g）— 0.1 mg/g；

Range（1 - 5 mg/g）— 0.2 mg/g；

Range（5 - 20 mg/g）— 0.3 mg/g；

4. Drift/stability (operating frequency 0.1Hz):<0.1% per month;

5. Sampling time:<2 seconds;

6. Connection: USB/4-20mA output (3 threads),

Analog output12 - 24 V AC/DC；

7. Power supply voltage: via USB port (5V,<200 mA);

8. Dimensions (l × b × h, in millimeters): 169 × 62 × 25;

9. Weight (in grams): 235;

10. Shell material: Aluminum, ABS plastic film coated；

11. Connector: 4-pin M5 male connector;

12. Protection level: IP54;

13 Battery life: 48 hours (5-second interval); 2 weeks (60 second interval);

Basic configuration

Instrument host; Chlorophyll fluorescence sensor（1Mi fiber optic cable); 2riceUSBConnecting line; Calibration attachments; Software and manualsUPlate; Sensor bracket; suitcase.

optional：2There are various types of chlorophyll fluorescence sensors available, which need to be specified in the order.

Application Cases

Chlorophyll Fluorescence Changes of Top and Bottom Leaves of Chili under Different Light Conditions

As shown in the figure below, the chlorophyll fluorescence values of the top and bottom leaves of crops（CF）The difference between the two is very obvious in terms of temporal changes. Chlorophyll fluorescence value（CF）There are two predictable sharp changes during the day. The first point is to switch to in the morningLEDWhen lighting, the second point is when sunlight begins to shine. Combined with other data monitored in the greenhouse, chlorophyll fluorescence values（CF）It can display the optimization effects and limitations of plant cultivation strategies.

Origin and manufacturer: NetherlandsSendot

FluoMini Pro Seed Maturity Analyzer

Seed maturity is an important intrinsic indicator of seed vitality. Seeds with poor maturity have a decrease in comprehensive indicators such as bud rate, bud vigor, soil arching ability, seedling formation rate, and seedling uniformity, which seriously affects seed quality and overall production. Therefore, it is necessary to improve the maturity of seeds. As early as 1998, Professor Jalink discovered that chlorophyll fluorescence intensity can be used as a probe to determine the germination rate of cabbage seeds. The chlorophyll measured using this technology is located within the seed coat of the seed and is independent of the color of the seed. The measured fluorescence intensity is positively correlated with the chlorophyll content in the seed coat. Therefore, Professor Jalink inferred that using chlorophyll fluorescence technology to measure the chlorophyll content of seeds is applicable to the vast majority of seeds. During the maturation process of seeds, chlorophyll in the seed coat will gradually decompose. Therefore, chlorophyll fluorescence technology can be used to measure the maturity of seeds and determine the most suitable harvest period.

The FluoMini Pro Seed Maturity Analyzer is non-destructive for measuring chlorophyll. By measuring the fluorescence intensity emitted by chlorophyll in the seed coat, the chlorophyll content in the seed can be determined, and the maturity and quality of the seed can be determined. The lower the chlorophyll content (the lower the chlorophyll fluorescence intensity), the higher the seed maturity. In addition, the FluoMini Pro Seed Maturity Analyzer can also be used to detect the integrity of seeds. Broken seeds will release chlorophyll, resulting in a higher measured chlorophyll content. Generally speaking, the higher the chlorophyll fluorescence measured for the same seed sample, the lower the seed maturity or/and the higher the seed rupture/damage degree; The lower the measured chlorophyll fluorescence, the higher the maturity of the seeds. The higher the maturity of the seed, the higher the germination rate of the seed.

main features

• Designed based on the principle of fluorescence spectroscopy, with accurate measurement and easy maintenance;

• Rapid and non-destructive detection of plant seed maturity and rupture degree;

• Used for seed quality identification, seed germination, and disease resistance prediction;

• Can be directly used for field testing to guide the optimal harvest time for seeds or fruits;

• It can continuously measure and record the changes in seed maturity with the environment.

Parameters

1. Measurement range: 0-10 mg/g;

2. Working temperature: 5-45 ℃;

3. Accuracy (CF):

Range（0 - 1 mg/g）— 0.1 mg/g；

Range（1 - 5 mg/g）— 0.2 mg/g；

Range（5 - 20 mg/g）— 0.3 mg/g；

4. Drift/stability (operating frequency 0.1Hz):< 0.1%Monthly;

5. Sampling time:< 2 s；

6.connect：USB/4-20mAOutput（3Threads),

Analog output12 - 24 V AC/DC；

7. Power supply voltage: ThroughUSBPort（5V，< 200 mA）；

8.connector：4needleM5Public head;

9.Battery life:48 h(5Second interval)；2Week（60Second interval).

Basic configuration

Instrument host; Seed sample box;2riceUSBConnecting line; Software and manualsUPlate; suitcase.

Application Cases

Maturity analysis and storage strategy of spinach seeds

answer5Batch spinach seeds at different receiving stagesFluoMini ProThe seed maturity analyzer was used for maturity testing, and the results showed that the first batch of seeds had the lowest chlorophyll content and the highest seed maturity; auxiliary word for ordinal numbers5The batch of seeds has the highest chlorophyll content, indicating that their seed maturity is the lowest or their rupture degree is high, resulting in relatively high chlorophyll content.

Origin and Manufacturer: NetherlandsSendot