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AZ8403
AZ8403
Handheld dissolved oxygen meter for aquaculture, water treatment, lab DO tracking. Clark-type DO probe, salinity & barometric compensation, 99-point memory, USB/IrDA output.
Reference price: USD 146.00
Frequently Asked Questions
How often should I calibrate the AZ 8403?
For optimal accuracy, calibrate before each use or daily. Recalibrate after replacing the membrane or when there are significant changes in temperature or altitude.
When should I replace the DO probe membrane and electrolyte?
Replace them if you notice unstable readings, slow response, or difficulty calibrating. Regular maintenance is recommended every 3–6 months, or immediately if the membrane is torn, fouled, or dry.
Can I use the AZ 8403 for BOD testing?
Yes, but please note that while the AZ 8403 provides high-accuracy DO readings, it does not have a built-in BOD calculation mode. Users must design their own testing protocol to manually calculate the BOD value based on the results.
What type of DO sensor does the 8403 use?
It uses the most cost-effective Clark type electrode. The 8403 DO probe does not need to refill electrolyte often as a galvanic electrode.
How many data points can be stored?
The 8403 stores and recalls 99 data points with temperature readings, each with a real-time clock timestamp.
What interfaces are available for data transfer?
USB interface and IrDA (infrared) interface. Data can be transmitted to the 9680 IrDA printer or linked to a PC via USB cable.
Does salinity and barometric pressure affect measurement?
Yes, both can affect DO accuracy. The 8403 allows manual salinity adjustment (0.0–50.0 ppt) and barometric pressure adjustment (500–1499 mmHg) for compensation.
What is the sensor lifetime?
Over 6 months with good maintenance.
Specifications
Technical parameters
| DO Range | 0–19.99 mg/L (ppm) |
|---|---|
| DO Accuracy | ±1.5 % FS |
| Temperature Range | 0–50 °C |
| Temp accuracy | ±0.3 °C |
| Salinity comp | 0.0–50.0 ppt |
| Baro comp | 500–1499 mmHg |
| Memory | 99 pts |
| Sensor | Clark cell . |
| Power | 4×AAA . |
| Weight | ~150 g |
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