1.It adopts microcontroller and menu operation for easy use. It has function of controlling peripheral equipment.

2.It can simultaneously display the dissolved oxygen concentration, saturation level and temperature.

3.It has functions of automatic temperature compensation and cleaning. In addition, it support zero oxygen calibration, full scale calibration and atmospheric pressure calibration.

4.It has isolation output(4～20)mA DC signal, and can have percent speed regulation for output upper limit and lower limit.

5.It has RS-232or RS-485(optional) digital communication port.

6.It has functions of automatic upper and lower limit alarming and data retention.

7.The instrument has four control relays. The two of them are used to output upper and lower limit alarming signal and the other two adopt programmable controller aiming to combine actuation and release time so that the automatic cleaning can be realized.

8.Up to 400 sets of measuring data can be stored and viewed.(including measuring value and storage time.)

9.The structure of electronic unit is plate-type or wall-hung for easy installation, operation and maintenance.

10.The electronic unit case has the protection level of IP65 in order to prevent water spraying and dust pollution.

1．Measuring range:

Dissolved oxygen concentration：(0.00～20.00)mg/L

Dissolved oxygen saturation：(0.0～200.0)%

 Temp:(-10.0～120.0)℃

2. Instrument error range

Dissolved oxygen concentration：±0.30 mg/L；(at reference temperature)

±0.50 mg/L；(The difference between calibrated solution temperature and actual solution temperature should be within ±15℃)

Dissolved oxygen saturation：±5.0%；(at reference temperature)

±10.0%；(The difference between calibrated solution temperature and actual solution temperature should be within ±15℃)

temp：±1.0℃

3. Stability<=±0.20 mg/L /24h

4. Repeatability<=0.20 mg/L

5. Output current error of electronic unit should be within±1%(FS)

6. Output upper and lower limit

Dissolved oxygen concentration：It can be chosen within the range of (0～20.00) mg/L(its corresponding output current range is 4mA～20mA )

Dissolved oxygen saturation：It can be chosen within the range of（0～200）%( its corresponding output current range is 4mA～20mA)

7. Temp of measured water sample:(0～45)℃

8. Normal instrument working conditions

a)Ambient temperature：(-5～50)℃；

b)Power supply: AC voltage(220±22)V，Frequency(50±0.5)Hz

c)There is no corrosive gas in surrounding air.

d)There is no function-affected oscillation in surrounding environment.

e)There is no other disturbance of electromagnetic field apart from geomagnetic field.

9. Dimension (length x width x height )：144mm×144mm×160mm hole size：138mm×138mm

10.Weight: 2.5kg