MP525

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This meter is a perfect combination with the most advanced electronic technology, sensor technology and software design. It is the best lab precision pH, mV and DO multi-parameter meter with the highest performance and the lowest cost. It is suitable for the trade such as the petroleum, chemical industry, medicine, power plant and environmental protection, etc., especially has more extensive application in the fields of education and scientific research.
Built-in microprocessor chip, beautiful appearance, multi-functional and easy to use, this meter has the following prominent features:
1.1. Meter meets with the requirement of international GLP standards. Its features up to automatic calibration, automatic temperature compensation, data storage, timing measurement, RS-232 output, clock display, function setting and automatic self-diagnose etc.

1.2. Adopts digital filter and step slipping technology to intelligently improve meter’s response speed and result accuracy. “ ” will appear when reading to be stable.
1.3. Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from four series of buffer solutions: Europe & USA series, NIST series, CHINA series, and Self-define solution.
1.4. High purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, expect the general slope temperature compensation, also added function of solution temperature compensation to make measuring accuracy to be more improved, especially suitable for use in fields of electric power and petrochemical etc.
1.5. With E_Hredox potential measuring mode can directly display ORP value which against potential of standard hydrogen electrode.
1.6. Equips new type of DO electrode which has function of automatic temperature compensation and automatic salinity compensation as well as automatic air pressure compensation inside meter to make DO measuring mode has temperature, air pressure and salinity automatic compensation, easy to use, accurate to measure.
1.7. Polarogram type DO electrode has special electrode calibration cap. Only needs 3 to 5 minutes for electrode polarization. Electrode adopts combination diaphragm cap which very convenient to use. Each DO electrode equips with three spare diaphragms caps.
1.8. Meter’s circuit board adopts SMT film-covering technology to improve meter’s production reliability.
1.9. Meter has the only product series number.
1.10.Dustproof and waterproof meter meets IP54 rating. All sockets are seal protected by silica gel caps.

2. Technical Parameters:

2.1. pH:

Measuring range	(-1.999 to 19.999) pH
Resolution	0.1/0.01/0.001 pH
Accuracy	Meter:±0.002 pH, connect meter with electrode:±0.01pH
Input current	≤1×10^-12A
Input impendance	≥3×10¹²Ω
Stability	±0.005 pH/3h
Temp. compensation range	(0 to 100) ℃（automatic or manual）

2.2. mV:

Measuring range (mV/ORP/E_H)	-1999.9 mV to 0 to 1999.9mV
Resolution	0.1mV
Accuracy	±0.03% FS

2.3. Dissolved Oxygen:

Measuring range	(0 to 40.00) mg/L(ppm) (0 to 200.0) %
Resolution	0.1/0.01 mg/L(ppm) 1/0.1%
Accuracy	Meter:±0.10 mg/L,connect meter with electrode:±0.40 mg/L
Response time	≤30 s (25℃, 90% response)
Residual current	≤0.1 mg/L
Temp. compensation range	(0 to 45) ℃（automatic）
Salinity compensation range	(0 to 45) ppt（automatic）
Air pressure compensation range	(80 to 105) kPa（automatic）
Automatic calibration	Air saturated by water; water saturated by air
Electrode type	Polarogram type

2.4. Temperature:

Measuring range	-10℃ to 110℃
Resolution	0.1℃
Accuracy	5 to 60℃ range: ±0.4℃ other range: ±0.8℃

2.5. Other Technical Parameters:

Data storage	900 groups
Storage content	Measuring value series number, measuring value, temperature, ATC or MTC state, measuring date and time
Power	DC9V/300mA
Communication connector	RS-232
Size and weight	160 x 190 x 70mm/880g
Quality and safety certification	ISO9001:2000, CE and CMC