oneCharacteristics of automatic determination of soil redox potential depolarization method:

1. The measurement items include ORP, temperature, and pH measurement, which can be measured one by one or simultaneously (when used in conjunction with a PC).
2. Single chip microcontroller compatible with PC (can be used independently in the field or in combination with PC)
3. Connect with PC through USB port.
4. It can be used in conjunction with a PC or laptop, and the entire process is automatically measured and processed under program control. In addition, it can automatically draw curves and save results, and can also choose single measurement or cyclic data collection as needed.
5. The measurement method is different from conventional measurement methods, using positive and negative depolarization methods for measurement.
6. Has good reproducibility accuracy. The result of the measurement is the final result, rather than the phased result of traditional methods
7. Shorten measurement time.
8. The measurement process and data processing are all automated.
9. The reference electrode potential is automatically determined by temperature lookup table
10. The instrument has higher integration, smaller size, and more comprehensive functions.
The result of measuring ORP using depolarization method is the final result, while the result of measuring ORP using traditional method is the stage
The result Eliminating your prejudice against using traditional methods to measure ORP instability in the past!

2、 Automatic measuring instrument for soil redox potential depolarization methodsummary:
The oxidation-reduction potential (Eh) has been used for a long time as a comprehensive indicator of the environmental conditions of a medium (including soil, natural water, culture media, etc.), which characterizes the relative degree of oxidation-reduction or redox properties of the medium. For a long time, the oxidation-reduction potential has been directly measured using a platinum electrode. The platinum electrode and reference electrode are directly inserted into the medium for measurement. However, when measuring weak equilibrium systems, due to the fact that platinum electrodes are not absolutely inert, their surfaces can form oxide films or adsorb other substances. The establishment of equilibrium potential is extremely slow, affecting the electron exchange rate of various redox pairs on the platinum electrode. In some media, it takes several hours or even one or two days, and the measurement error is very large, usually 40-100mV. If the surface properties of platinum electrodes and the dynamic process of electrode potential establishment are fully considered, for complex media, if depolarization method is used to measure the oxidation-reduction potential, more accurate results can be obtained in a shorter time of 2 minutes, usually less than 10mV or better. Eliminating your prejudice against using traditional methods to measure ORP instability in the past!

IIIAutomatic measuring instrument for soil redox potential depolarization methodPrinciple:
Adjust the polarization voltage to 600 or 750mV, use a silver chloride electrode as an auxiliary electrode, connect the platinum electrode to the positive end of the power supply, anodize (polarization time can be freely selected for more than 10 seconds), then cut off the polarization power supply (depolarization time can be freely selected for more than 20 seconds), and monitor the potential of the platinum electrode during depolarization (for calomel electrode). There is a linear relationship between the internal electrode potential E (millivolts) and the logarithm logt of depolarization time. Perform cathodic polarization and subsequent depolarization monitoring using the same method. The intersection point of the extension line of the anodic depolarization curve and the cathodic depolarization curve is equivalent to the equilibrium potential. The equation for the two curves is:
E positive=a1+b1logt positive
E Yin=a2+b2logt Yin
Solving these two linear equations can obtain the formula for equilibrium potential
E=(a2b1-a1b2)/(b1-b2)
The Eh value can be calculated by adding the equilibrium potential to the potential value of the reference electrode at that temperature.
By inputting data about two depolarization curves into the computer, the Eh value of the soil can be automatically calculated. But in the process of manual measurement, the operation is tense and the mathematical processing is heavy

The main functions are:
1. Automatic control of polarization time;
2. Automatic control of depolarization time;
3. Automatic data collection;
4. Automatically change polarity;
5. Automatic temperature compensation for Ag AgCl electrode potential;
6. Automatically perform data processing.
It not only improves measurement accuracy, but also enhances work efficiency and reduces labor intensity. The BFJA-4 type oxidation-reduction potential depolarization automatic measurement system consists of electrode parts (platinum electrode, reference electrode, auxiliary electrode, and temperature sensor), small hardware components, microcontroller, and application software. It can be used independently or in combination with a PC, and can be applied indoors or outdoors. It can be used for single measurement or cyclic data collection. Provide a new instrument for measuring Eh.
Automatic determination of soil redox potential by depolarization methodTechnical parameters:

1Measurement range:0arrive+-1999.9mV;The minimum reading is0.1mV
2、ORPMeasurement accuracy: less than10mV
3Input impedance:>10of10Southern Europe
4The shortest time to complete a measurement:2minute
The power supply is provided by8.4VPowered by lithium batteries, when the battery indicator on the LCD display shows low power, it can be charged using a random accessory charger (with protective circuit)

Company Name: Beijing Jingcheng Huatai Instrument Co., Ltd

: Wang

：/56143787