DO Meter

The Series DC-4000 DO transmitter provides available information of dissolved oxygen with continuous and stable measurement. The transmitter is supplied with galvanic or polarographic sensor according to the process condition. This device can control the concentration of dissolved oxygen in sewage water, industrial water, fermentation and other water quality monitoring application.
It computes the ppm value based on the temperature, the atmospheric pressure, and the salinity. Our sensors can be utilized in most monitoring applications since the best suited electrode can be chosen from a wide variety of models. The process temperature is accurately measured at the sensor and reflected to DO value through temperature compensation.
Specification Nomenclature DO analyzer / controller
ModelDC-4000
Measuring range0.00 to 20 mg/l (ppm) -5 to 100 ¡ãC (23 ~ 212 ¡ãF)
DisplayManually wwitchable range of 0~10mg/l, 0~20mg/l
Measuring principle DC-4000-G: galvanic cell
DC-4000-P: polarographic
Accuracy within 1% of span
Linearity+/- 0.5% over full scale
Repeatability+/- 0.5% over full scale
Automatic temperature
compensation rangeStandard: -10 ~ 85 ¡ãC (14 ~ 185 ¡ãF)
Option: -1 0~ 135 ¡ãC (14~ 275 ¡ãF )Allowable humidityless than 95% R.H.
Response time90% response within 10 seconds
Calibration of indicating value Two points calibration is completed by immersing an electrode into known sample and air saturated water. Output4-20 mA / 1-5V DC isolated (Max wire resistor : 1000 ohm)
Control functionContact Output: high/low limits (free choice over full scale)
Sensitivity: 1/100Relay contact rate: 250V AC 6A
Power source 110/220V AC +/- 10% 50/60Hz
Power ConsumptionApprox. 6VA
EnclosureIP 68, waterproof casing. Aluminium alloy casting Dimensions 210 W x 240 H x 150 D mm (8.26 x 9.45 x 5.95 inch) Mountingwall, rack, pole Weight
5.5 kg (12.12 lbs.)

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The company was established as "Sechang Corporation" in 1980 and was restructured to "Sechang Instruments Co., Ltd" by the end of 1996. We have a stable roster of customers in South Korea. Since the company'more>>