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Waterproof Multifunction Meter CX-401
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CX-401 measures : pH, redox potential (mV), conductivity, resistivity, salinity in KCl or NaCl, TDS, dissolved oxygen in % of saturation or in mg/l, atmospheric pressure and temperature.
“HOLD” function to freeze the result on the display.
Signalisation of the result stabilisation “READY” with symbol and sound.
Possibility of sending to a PC a report of calibration - up to 10 last calibrations.
The meter may be used for the field measurements as well as during accurate laboratory work.
The meter is equipped with an easy-to-read back-light LCD display with brightness control.
All functions are distinctive by very high accuracy and repeatability.
Unification of the operating procedures in all measuring functions makes working
Low weight and small size make working in the field easier.
Waterproof housing (IP-66) enables working in difficult conditions.

In the pH measurement function:
Depending on the kind of applied electrode it may be used for clean water, sewage, soil, meat, paint etc.
Calibration of the pH electrode in 1 to 5 points.
Automatic detection of buffer solutions, their values may be set by the user.
Automatic correction of the pH sample solution value changes along with the temperature changes for NIST standards.
Automatic or manual temperature compensation.
Possibility of storing characteristics of 3 pH electrodes enables their quick replacing - very useful feature during field work.
Automatic control of the electrode’s condition.
Readout of the pH electrode condition and data - the zero offset and slope percentage may be checked.

In the mV and redox potential measurement function:
Precise Redox potential measurement (accuracy 0.1mV).
Possibility of mV measurement in relation to the set or measured reference potential (Vref).
Possibility of automatic calculation of the redox reading in relation to chloride/silver electrode to the hydrogen electrode.

In the conductivity measurement function:
Full measuring range enables measurements in ultra pure water, natural water as well as in very salty solutions.
The liquid resistivity measurement option added.
Salinity measurement in NaCl or KCl on the basis of the actual real characteristics.
Defining the TDS (Total Dissolved Solids) based on conductivity measurement.
6 sub-ranges switched automatically.
In case of measurements of natural water with conductivity from 60 μS/cm to 1 mS/cm the meter enables using non-linear temperature compensation. The parameters of this type of water is determined in norm EN27888:1999 and concerns surface waters, deep water and well water. This solution lowers the measurement error.
The measurement accuracy of the ultra pure water with temperature compensation was increased by automatic adjustment of the α coefficient depending on the temperature and kind of trace contaminations.
Calibration by entering the constant K of the cell or in standard solutions in 1 to 5 points.
Wide range of α coefficient 0 ÷ 10 % / °C chosen depending on the measured solution.
Possibility of changing the reference temperature.
High accuracy conductivity cell ECF-1 available as additional equipment. Measuring range 0÷500
mS/cm sufficient for measurements in ultra pure water and high salt concentration samples. Metal
electrodes are easy to clean and PVC body protects it against mechanical damage.
Possibility to measure electric admittance of tree seedlings – checking the vitality of seedlings after
purchasing a special sensor.

In the oxygen measurement function:

Possibility of measurement of the oxygen dissolved in the liquids and oxygen in the air.
Atmospheric pressure measurement with automatic calculation of its influence on measurement of the dissolved oxygen in water in % or mg/l.
Automatic conversion of the salinity measured in the conductivity mode to the oxygen measurement mode with calculation of its influence on the oxygen content value.
Easy in use and maintenance galvanic oxygen sensor.
1 or 2 point oxygen sensor calibration.
Wide measuring range enables measurements in lakes with blooming vegetation.

Other features:
* Automatic or manual temperature compensation.
* Internal clock with date.
* Collecting up to 4000 results in the internal data logger with temperature, time and date, also taking series of measurements possible.
* Non-volatile memory of the stored results and calibration data
* Possibility of connecting with a PC by micro USB connector
* Software for data transmission and collection delivered in set.
* Powered by rechargeable batteries, or power adapter with USB - micro USB cable.
* The meter meets the GLP requirements.
* 24 months of warranty for the meter.
* The meter was awarded with a golden medal on International Fair EUROLAB.
* Possibility of choosing the meter equipped with separate connectors or with multi-pin
connector for multifunction measuring head.

Technical Data:

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