SJG-208 type dissolved oxygen monitoring instrument for sewageDetailed product description：

Characteristics of SJG-208 Sewage Dissolved Oxygen Monitor:

The structural characteristics of the instrument are disk mounted or wall mounted, making it easy to install, operate, and maintain
The instrument displays in a backlit dot matrix format, using a Chinese menu, and simultaneously displays the dissolved oxygen concentration, dissolved oxygen saturation, and water sample temperature values of the tested water sample
Equipped with a (4~20) mA DC signal, the output upper and lower limits can be infinitely adjusted
Equipped with upper and lower limit alarm functions, contact capacity: AC 220V, 2.5A
Equipped with automatic temperature compensation function, it can perform zero oxygen calibration, full-scale calibration, and pressure calibration
It has data protection function, which means that when the instrument is performing other tasks such as automatic cleaning, the display screen will maintain the original measurement
Measure data and display new measurement data after restoring normal measurement status

The instrument is equipped with four control relays, two of which are used to output upper and lower limit alarm signals; The other two can freely set their suction and release time to achieve automatic cleaning function of the instrument

The instrument has data storage and query functions, and can store 400 sets of measurement data (including measurement values and storage time)
The protection level of the electronic unit chassis is IP65, which can prevent water spray and dust intrusion
Equipped with RS-232 or RS-485 output interface, capable of digital output

Technical specifications of SJG-208 sewage dissolved oxygen monitoring instrument:

1. Measurement range resolution
Dissolved oxygen: (0.00~20.00) mg/L 0.01mg/L
Dissolved oxygen saturation: (0-200.0)% 0.1%
Temperature: (-10.0~120.0) ℃ 0.1 ℃

2. Basic instrument error
Dissolved oxygen: ± 0.30mg/L (calibration temperature is isothermal with the measured water sample) ± 0.50mg/L (the difference between the calibration temperature and the measured water sample temperature does not exceed ± 15 ℃)
Dissolved oxygen saturation: ± 5.0% (calibration temperature is isothermal with the measured water sample) ± 10.0% (the difference between the calibration temperature and the measured water sample temperature does not exceed ± 15 ℃) Temperature: ± 1.0 ℃

3. Stability of electronic unit: (± 0.10mg/L)/24h
4. Response time: 2 minutes (90% response at 20 ℃)
5. Temperature of the tested water sample: (0-45.0) ℃
6. Flow rate of the tested water sample: (300-500) ml/min
7. Dimensions (mm) Electronic unit: 144 × 144 × 150
8. Hole size (mm) Electronic unit: 138 × 138
9. Weight: Electronic unit: 2kg