Measurement of pH and salinity

Determine the EC value directly in aqueous solutions.

COMBI 5000 EC - Conductivity measurement

Conductivity EC Measurement in Solutions

The electrical conductivity of a solution is its ability to carry (or conduct) electrical current. The unit of conductivity is Siemens / cm or Milli-Siemens (mS). In horticulture, the unit mS is also referred to as "EC" (electric conductivity). In aqueous solutions, there is a direct relationship between the concentration of dissolved salts and the conductivity; the higher the salinity, the higher the conductivity.

For plant nutrition, the measurement of conductivity is of enormous importance, eg

• For all culture methods, the correct fertilizer / process water ratio should be checked before each liquid fertilization. The manufacturers of liquid fertilizers and nutrient salts provide the respective concentration-dependent EC values ​​of the various fertilizers. The nutrient solution is checked after the output of the fertilizer mixer.
• In addition, an occasional check of the process water, especially in the production of salt-sensitive plants, is highly recommended.
• In closed systems, the EC measurement of the nutrient solution is essential. This measurement is usually done with fixed EC probes controlling the fertilizer computer. It is recommended to check the installed measuring electrodes from time to time.
• All "nondeless" hydroponic culture methods require constant control of the EC value due to the lack of buffering of the substrate.
• Review of soil / substrate suspensions. Soils or substrates are mixed in a defined ratio with water and the salts completely dissolved. The conductivity, measured in the suspension, can be converted to the salt content in mg / l substrate.

The EC measuring device COMBI 5000 EC meets all requirements for a reliable, high-quality measuring device.The sensor technology with platinum-coated electrodes is absolutely maintenance-free and fast-response. The high measuring range up to 200 mS also allows the control of highly concentrated stock solutions.

The temperature is automatically compensated. The device is factory-calibrated and usually requires no readjustment. Two control standards with 111.8 mS and 1.4 mS are available.

Applications:

• Ornamental plants: for the control of nutrient solutions (fertilizers), for the control of stock solutions, for the determination of substrate suspensions
• Erdelose (rock wool), hydroponic culture method
• Substrate production to determine the salt content in mg salt / l substrate
• Laboratory as a universal conductivity meter

Technical specifications:

• Housing: splash-proof
• Inputs: 8-pin socket
• Voltage: 9V battery,> 4000 measurements
• Display: alphanumeric, reflective
• Size: 180 x 85 x 50 mm
• Weight: 280 g

EC measurement:

• Measuring range: 0 - 200 mS
• Resolution: 0.001 - 0.01 mS
• Accuracy: ± 2% of reading
• Calibration: possible at 0.084 / 1.41 / 5.0 / 12.88 / 111.8 mS / cm
• Electrode: EC plastic electrode with platinum sensors (automatic temperature compensation)
• Electrode length: 125 mm
• Areas of application: Conductivity measurement in aqueous solutions

Delivery:

• COMBI 5000 EC basic unit
• EC plastic probe with high quality platinum sensors
• Calibration solutions 1.4 mS and 111.8 mS
• Volume measuring cup, 100 ml
• operation manual
• Sturdy aluminum case

Determine the pH directly in soils / substrates and liquids.

pH meter pH 3000 with case

Direct measurement pH value

Addition to the salt content, the pH value is the most important parameter in plant nutrition. The absorption of nutrients by the plants is highly dependent on the pH value:

• Too low pH values ​​block the absorption of nutrients from main nutrients such as phosphorus and potassium
• Too high pH values ​​prevent the absorption of trace elements, eg. Eg iron (iron chlorosis!)

For this reason, fast, easy and accurate pH measurements in production horticulture are essential. The pH 3000 fulfills all the requirements for a pH meter for use in soil analysis in an ideal way. It is specially designed for the needs of on-site measurement in horticulture. The housing of the basic unit is robust, insensitive to temperature and offers optimum protection against moisture and humidity. The newly developed puncture pH electrode with a special membrane as sensor withstands even the enormous demands of direct measurement. Three ceramic diaphragms guarantee a short response time, prevent a rapid clogging of the diaphragms and ensure a long-term use of the electrode.

Of course, the pH 3000 can not only be used for direct measurement in the soil or substrate:
the measurement of water and fertilizer solutions is also possible. Calibration of the pH 3000 happens automatically after immersing the electrode in the buffer solution. Two LEDs signal the current buffer solution. The device with integrated stability indicator "automatically" recognizes the end of the respective calibration. The calibration will not be released until the electrode generates a stable signal.

The "pH / mV" switchover function allows a simple and accurate check of the electrode state. A "low-bat" indicator warns when measuring with low battery performance. The delivery takes place in a sturdy aluminum case for transport and proper storage of the device.

Technical specifications:

• Housing: splash-proof
• Size: 180 x 85 x 50 mm
• Electricity requirement: 9 volt block battery,> 4000 measurements
• Inputs: BNC socket
• Weight: 280 g

pH measurement:

• Measuring range: 0 - 14 pH
• Resolution: 0.01 pH
• Acceptability: 0.02 over the entire measuring range
• Calibration: automatic 2-point calibration (possible at pH 4 and pH 7)
• Electrode: low-maintenance, gel-filled pH penetration electrode with 3 ceramic diaphragms
• Sample length: 125 mm
• Areas of application: Direct pH measurement in soil / substrates and in aqueous solutions

Delivery:

• pH 3000 basic unit
• Special puncture electrode
• Buffer solution pH 4.0 and 7.0 per 100 ml
• KCl storage solution for pH electrodes
• prick lance
• Sturdy aluminum transport and storage case
• Operating instructions with guide values

Flow measurement of temperature, pH and EC values.

pH-EC Flow Control 5000

The pH-EC Flow Control 5000 enables simultaneous, continuous monitoring of pH, conductivity (given in EC and TDS) and temperature of solutions. The device has been developed on the basis of the latest microprocessor technology from STEP Systems and is manufactured entirely in Germany.

With automatic sensor and buffer detection, misuse and misinformation are virtually impossible - the safety of the right application has been perfected. Inverse measured value display when exceeding or falling below the individually adjustable limit values ​​ensures timely intervention in the event of incidents. The risk of over-fertilization or undersupply of plants due to incorrectly adjusted fertilizer systems is minimized.

The display simultaneously shows the values ​​Temperature, pH, Conductivity and TDS. The hanging loop for wall mounting allows easy and quick installation. With the installation kit, the electrodes can be inserted directly into the line system or via a bypass without much effort and removed again (eg during calibration or electrode replacement).

Technical specifications:

• Measuring range: рН 0 - 14; E0-0-200 mS / cm; TDS 0-106,000 ppm; t ° -20 ... + 80 ° С
• Resolution: 0.01 рН; ЕС 0.01 mS / cm; TDS 1 ppm; t ° 0,1 ° С
• Accuracy: ± 0,02 рН; ± 0,5 ° С ЕС / TDS ± 2% of the measured value
• Temp. Comp .: with built-in NTC temperature sensor
• PN calibration: automatic, possible at рН 4, pH 7 and pH 10
• EC calibration: automatic, possible at 0.084 / 1.41 / 5.0 / 12.88 / 111.8 mS / cm
• EC electrode: EC plastic electrode, 8-pin socket, cable length 110 cm
• рН electrode: pH penetration gel electrode, BNC socket, cable length 110 cm
• Max. Pressure: 5 bar
• Alarm: visual inverse graphic display
• Alarm delay: adjustable time delay of 0 - 255 s after exceeding or falling below the limit values
• Conversion factor EC-TDS: automatic
• Power requirement: 9 V with external power pack (for continuous operation) or 9 V with block battery> 3,000 measurements (for short-time operation)
• Size: 83 х 180 х 55 mm
• Weight: 300 g (basic unit)

Delivery:

• pH-EC Flow Control 5000
• pH-flow electrode
• Buffer solutions pH 4 and pH 7 (100 ml each)
• EC-flow electrode
• Calibration solutions 1.4 mS and 111.8 mS (50 ml each)
• 2 x installation kit
• 9V battery
• Power supply with cable 160 cm
• Manual

pH + EC + activity + temperature + humidity only with 1 device

Multifunction device COMBI 5000 with case

The COMBI 5000 is a universal device for the immediate measurement of the most important parameters in plant production.

The latest microprocessor technology enables automatic sensor detection: Immediately after connecting the electrode, the respective correct Measurement unit displayed on the LCD screen.

The automatic buffer recognition during calibration also ensures a high level of operating convenience and ensures additional safety. The simple and easy to understand menu navigation can be set in three languages: DE, EN, RU. The COMBI 5000 comes in a sturdy aluminum case, where all accessories are stored safely and within reach.

Technical specifications:

COMBI 5000 basic device

• Housing: splash-proof
• Inputs: BNC and 8-pin socket
• Voltage: 9V battery,> 4000 measurements
• Display: alphanumeric, reflective
• Size: 180 x 85 x 50 mm
• Weight: 280 g

pH measurement

PH is one of the most important parameters in plant nutrition. The absorption of nutrients by the plants is highly dependent on the pH value. With the COMBI 5000 and the measuring electrode specially developed for soil analysis, the pH value can be measured directly in the soil.

• Measuring range: 0 - 14 рН
• Resolution: 0.01 pH
• Accuracy: 0.2 pH
• Calibration: Calibration at pH 4, 7 and 10 with automatic buffer detection
• Electrode: low-maintenance, gel-filled pH penetration electrode with 3 ceramic diaphragms
• Electrode length: 125 mm
• Fields of application: Direct pH measurement in the soil or substrate and in aqueous solutions

EC measurement

The electrical conductivity (EC) of an aqueous solution directly depends on the concentration of dissolved salts: the higher the salt content, the higher the conductivity. For plant nutrition, the EC measurement of the process water and the nutrient solution, especially in closed and hydroponic culture methods, is required.

• Measuring range: 0 - 200 mS
• Resolution: 0.001 - 0.01 mS
• Accuracy: ± 2% of reading
• Calibration: possible at 0.084 / 1.41 / 5.0 / 12.88 / 111.8 mS / cm
• Electrode: EC plastic electrode with platinum sensors (automatic temperature compensation)
• Electrode length: 125 mm
• Areas of application: Conductivity measurement in aqueous solutions

Multi-probe: activity, humidity, temperature measurement

The newly developed multi-probe allows simultaneous measurement of activity (salinity), humidity (volumetric) and temperature. The activity determines the salinity directly in the soil or substrate, taking into account the respective soil properties, such as soil moisture, temperature and density. These factors determine the dissolved salts that are "active" and can be absorbed by the plants under the given conditions.

The soil moisture is determined volumetrically according to the FDR measuring principle. As a result, the influence of pH and salinity of the soil or substrate can be neglected.

The temperature is measured in the range of -10 ° C to + 50 ° C by a fast-reacting, spattered in the probe tip NTC sensor.

Multi-Probe:

• Probe: PVC, Ø 10 mm
• Probe length: 250 mm
• Sensors: FDR capacitive (humidity), NTC (temperature), bi-pol (salinity)
• Temperature compensation: automatic
• Fields of application: Measurement of salinity, temperature, soil, substrate moisture

Activity measurement (salinity):

• Measuring range: 0 - 9.99 g / L active salts
• Resolution: 0.01 g / L of active salts
• Calibration: factory, stable

Temperature measurement:

• Measuring range: -10 ... + 50 ° C
• Resolution: 0.1 ° C

Moisture measurement:

• Measuring range: 0.5% to 80%
• Resolution: 0.1%
• Calibration: 0%: against air and 99.9%: in water

Delivery:

• Basic device COMBI 5000
• pH insertion electrode
• Buffer solutions pH 4 and pH 7
• EC-electrode
• Calibration solutions 1.4 mS and 111.8 mS
• Multi-probe
• prick lance
• Spray bottle, 250 ml
• Volume measuring cup, 100 ml
• manual
• Sturdy aluminum case