Portable water quality dissolved oxygen pH conductivity meter

Scope of application

The portable dissolved oxygen meter is an intelligent analytical instrument that can be used for the measurement of dissolved oxygen in water bodies in departments such as tap water source monitoring, aquaculture farms, environmental protection, sewage treatment plants, beverage industry and scientific research units. The instrument has a novel appearance and is easy to carry, suitable for on-site and field operations. At the same time, the battery of the instrument has a long continuous working life and can be used as a routine analytical equipment in the laboratory.

Instrument features

(1) The instrument can measure dissolved oxygen concentration, dissolved oxygen saturation and temperature.

(2) The instrument adopts microprocessor technology and has automatic temperature compensation function. It can perform zero oxygen calibration, full scale calibration, air pressure calibration and salinity calibration.

(3) The instrument has a data power-off protection function. After the instrument is turned off or in the case of abnormal power failure, the measurement data and set parameters stored in the instrument will not be lost.

(4) The instrument adopts a low-power design and has an undervoltage display mark. The instrument can store, delete and view the measurement results. It can store more than 100,000 test data.

(5) The instrument uses a new material Android panel with good reliability.

(6) The instrument has an IP54 protection level, is waterproof and dustproof, and is suitable for field operations.

Main technical performance of the instrument

(1) Dissolved oxygen sensor

Principle: fluorescence method

Concentration: 0-20mg/L (ppm)

Accuracy: <5ppm: ±0.2ppm (0.2mg/L); >5ppm: ±0.3ppm (0.3mg/L)

Repeatability: 0.2ppm (0.2mg/L)

Response time (dissolved oxygen): T90 <30 seconds

Dissolved oxygen regression at the same temperature <0.1mg/L condition: stable for 200S

Temperature shock regression <0.1mg/L condition: stable for 1 hour

Dissolved oxygen saturation: 0-200% saturation

Temperature: 0-40℃

Communication interface: RS485 (baud rate 9600)

Communication protocol: ModbusRTU

Power consumption: 20mA

Waterproof depth: 10 meters

Shell material: ABS/PC 304 316 stainless steel

Tail material: PVC

(2) PH sensor

Measuring range: 0～14pH

Applicable temperature: 0～60℃

Percentage theoretical slope: (PTS) ≥98.5% (25℃)

Zero pH value: 7±0.25pH

Internal resistance: ≤250MΩ (25℃)

Alkali error: ≤15mV (25℃)

Response time: ≤2s (25℃)

Working environment temperature 5-40 degrees

Working environment relative humidity: ≤85%

(3) Conductivity

Application: Conductivity measurement of weak electrolytes such as industrial water, cooling water, tap water, and purified water

Features: 316L stainless steel or engineering plastic, corrosion-resistant, long service life

Electrode constant: k=1.000

Electrode type: two-electrode type

Electrode material: 316L stainless steel

Mounting thread: 1/2"NPT

Withstand pressure: 0.5Mpa

Medium temperature: 0～60℃

Lead structure: direct lead wire, standard 5-meter wire

(4) Normal working conditions of the instrument

Ambient temperature: (0.0～40.0)℃

Atmospheric pressure: 86~106 kPa

Relative humidity: <85%

Protection level: IP54

In an environment without corrosive gases and good ventilation, there is no electromagnetic interference except the geomagnetic field.

(5) External power supply: DC 5V /2A

(6) Rated power: 3W

(7) Battery capacity: 6000mAh (standby 10h)

(8) Dimensions: 85mm*38mm*176mm

Product's Website：http://en.huoerd.com/djf/1615.html