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FDO-99 0~20mg/L Industrial Waste Water Digital Online Polarographic Farming DO Dissolved Oxygen analyzer Meter with 4-20mA
PAYMENT REFUND AGREEMENT is accepted in case of bad quality
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4-20mA water dissolved oxygen sensor contains sensor and transmitter, it adopts the advanced fluorescence quenching principle and accurate phrase detection technology and innovative packaging process, which makes its reliability and service life leading the rival product greatly. Its unique characteristics of long-term low drift and maintenance-free make the product surpass and take the place of traditional membrane electrode completely.
4-20mA water dissolved oxygen sensor: Sensor performance
Measurement range | DO: 0 ~20 mg / l or 0~ 20ppm, Air saturation: 0 - 120% |
Resolution | ± 0.01mg / l |
Measurement Accuracy | ± 0.2mg / l or ± 1% FS |
Response time | Less than 6 0 seconds(T90) |
Temperature sensor | Detection range 0 - 50 ℃ Resolution ± 0.1 ℃ Accuracy ± 0.5 ℃ |
Operating temperature | 0 ~50 ℃ |
Storage temperature | - 40~80 ℃ |
Installation depth | 0 - 20m |
PH range | 2 - 12pH |
Salinity range | 40ppt (highest) |
Chemical adaptability | methanol and ethanol safety, avoid other organic solvents |
Calibration | Single-point or two-point calibration, using oxygen-free water and air, respectively. Factory has calibrated, so it generally needs no calibration. |
Anti-interference | not interfered with the following substances : H2S, CO2, NH3, SO4, Cl-,CLO2, MeOH, EtOH, etc. |
measurement foil | Polyester embedded ruthenium metal phosphors |
Light blocking layer | Teflon |
Foil lifetime | 3 years (10 seconds measurement interval) |
Sensor shell | 316L |
Size | Φ62 × 150mm |
Weight | 800g |
Power supply | 5VDC, provided by the transmitter |
Sensor cable | standard 8 meters |
4-20mA water dissolved oxygen sensor: Transmitter performance
Dimensions | 210/105/185mm, L/ W/ H |
Weight | 1.5 kg (standard) |
Operating temperature | 0 ~50 ℃, avoid direct sunlight |
Relative humidity | 5% - 90% (non-condensing) |
Protection | polycarbonate enclosure, IP65 |
Power supply | 24VDC or 220VAC, 10W |
Analog output | 4 - 20mA output (dissolved oxygen values or saturation) circuit load 500 ohms; optional temperature 4 - 20mA output |
Relay outputs | 4-channel alarm relay and 1-channel cleaning relay output, electric shock capacity 250VDC, 3A |
Field display | 240 * 160 backlit LCD (optional) |
Digital interface | RS232 or RS485 |




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optical do probe
Packing Details : one unit in single carton.
Delivery Details : 7 working days after receiving the 100% payment.
All kinds of transportation are accepted.

Dongrun Instrument Science and Technology Co., Ltd. was founded in 1998, specializes in manufacturing online water quality analysis equipment, material level meters, pressure gauges, special temperature gauges and laboratory analysis equipment.




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