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DOS-600 Digital Dissolved Oxygen Sensor Content Dissolved Oxygen Electrode RS485 Modbus/4-20mA Dissolved Oxygen Probe
Product Description
DOS-600 Dissolved Oxygen Sensor & Probe (RS485 Modbus / 4-20mA / Analog Voltage)
Support Bulk Orders & Custom Service Orders
1 Available Output Types
There are three types of sensors (please choose one option when ordering):
DOS-600A (Voltage Output)
Analog voltage output function. 0-20 mg/L corresponds to 0-3.3V or 0-5V.
DOS-600B (Current Output)
Analog current output function. 0-20 mg/L corresponds to 4-20mA.
DOS-600C (RS485 Modbus)
RS485 communication output function. Simultaneously outputs dissolved oxygen and temperature values.
Note: The sensor supports only one selected type of output signal. It cannot provide multiple signal outputs simultaneously.
2 Technical Indicators
| Measurement Range | 0 ~ 20.00 mg/L (automatic range switching); 0 ~ 60°C |
|---|---|
| Resolution Ratio | 0.01 mg/L, 0.1°C |
| Precision | ±0.5% FS, ±0.3°C |
| Automatic Temperature Compensation | 0 ~ 60°C |
| Communication Interface | RS485 interface, standard MODBUS communication protocol |
| Signal Output | Optocoupler isolation protection: 4~20mA signal output or analog voltage output |
| Working Conditions | Temperature: 0 ~ 60°C; Relative humidity: ≤90% |
| Output Load | Load < 300 Ω (4-20 mA) |
| Working Voltage | DC 24V, DC 12V, or DC 5V (as configured) |
| Cable Length | Standard 2 meters (extended cable options available at additional cost) |
3 Sensor Interface Definition & Wiring
General Power Supply
White Line
Power supply positive pole (+)
Black Line
Power supply negative pole (-)
DOS-600A (Voltage)
Red Line
Analog voltage positive pole (+)
Yellow Line
Analog voltage negative pole (-)
DOS-600B (4-20mA)
Red Line
Analog 4-20mA output positive (+)
Yellow Line
Analog 4-20mA output negative (-)
DOS-600C (RS485)
Red Line
RS485 Port A+
Yellow Line
RS485 Port B-
4 Package & Shipment Content
- 1 × Digital Dissolved Oxygen Sensor (2-meter cable length)
- 1 × Spare Membrane Head
5 Product Display
? Frequently Asked Questions (FAQ)
Q1: Can the DOS-600 sensor output both 4-20mA and RS485 simultaneously?
A1: No, the sensor supports only one specific output type (DOS-600A, DOS-600B, or DOS-600C). Multiple signal types cannot be output concurrently.
Q2: Which model provides simultaneous temperature and dissolved oxygen readings?
A2: The DOS-600C model with RS485 Modbus communication provides real-time digital readouts for both dissolved oxygen content and temperature values.
Q3: What power supply voltage is required to operate this sensor?
A3: The sensor can be configured to operate with DC 24V, DC 12V, or DC 5V power sources depending on your system specifications.
Q4: Is the cable length customizable for deeper or distant installations?
A4: Yes, while the standard package comes with a 2-meter cable, extended cable lengths can be customized upon request for an additional fee.
Q5: What is included in the standard product package?
A5: Each shipment includes one complete digital dissolved oxygen sensor equipped with a 2-meter cable and one spare membrane head for maintenance.
