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Portable Type

P-521 Portable pH/DO Meter

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Suitable for industrial and mining factories, power plant, aquaculture and environmental protection, especially for outdoor purposes.

●Large LCD screen with controllable white backlight.

●Humanized designs like rack and skid proof shell make it more convenient for users.

●Built-in microprocessor chip with functions of auto calibration, auto temperature compensation, data storage, function setup, self-diagnosis, auto power off, low voltage display.

●Double-parameter and equipped with pH electrode and conductivity electrode, can recognize electrode automatically.

●Auto recognition of 13 standard pH buffers and there are three series of standard buffers for option: Europe & USA, NIST and China.

●Able to set pH measurement modes of high purity water and pure water with ammonia.

●DO mode has functions of ATC, auto salinity compensation and auto pressure compensation.

●New structure polarographic DO electrode can measure temperature, salinity and dissolved oxygen simultaneously and equipped with special DO electrode calibration sleeve, only need 3~5 minutes for polarization.

●IP57 and equipped with calibration solution and carrying case.


Specifications


PH

Measuring range

(-2.00 ~ 19.99) pH

Resolution

0.1/0.01 pH

Accuracy

Electrode: ±0.01 pH, Instrument: ±0.02 pH

Input current

≤2×10-12 A

Input impedance

≥1×1012 Ω

Stability

±0.01 pH/3h

Temperature compensation

(0 ~ 100) (automatic)

mV

Measuring range

-1999mV ~ 0 ~ 1999mV

Resolution

1 mV

Accuracy

Electrode: ±0.1% FS

DO

Measuring range

(0 ~ 20.00) mg/L(ppm), (0 ~ 200.0)%

Resolution

0.1/0.01 mg/L(ppm), 1/0.1 %

Accuracy

Electrode: ±0.10 mg/L, Instrument: ±0.40 mg/L

Response time

≤30s (25, 90% response)

Residual current

≤0.1 mg/L

Temperature compensation

(0 ~ 45) (automatic)

Salinity compensation

(0 ~ 45) ppt (automatic)

Pressure compensation

(66 ~ 200) kPa (manual)

Automatic calibration

Air saturated by water, water saturated by air

Electrode type

Polarographic

Others

Data storage

200 groups

Storage contents

Series number, measuring value, measuring unit and temperature

Power

Two AA batteries(1.5V×2)

Size & Weight

65×120×31mm/180g (instrument)

255×210×50mm/790g (with carrying case)

Working Conditions

Ambient temperature

(5 ~ 35) (grade 0.01)

Ambient humidity

≤85%

IP grade

IP57


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