Portable ppb DO Meter
1) DO range: 0.10μg/L~100μg/L, 100μg/L~20.0mg/L (range automatic switch);
2) High-precision and sensitive sensor Electrochemical polarographic technology, detection accuracy up to 1.0μg/L
3) The fastest response and measurement, usually only 3 minutes from the oxygen concentration in the air to the μg/L level
4) Long-life electrode production process The electrode has a long service life and reduces the cost of frequent electrode replacement
5) Easiest to use and calibration management, can be measured after power on, no need for long-term electrode polarization
6) Long maintenance cycle and low-cost consumables, 4~8 months of normal use, easy and convenient electrode maintenance
7) Low power consumption design and long working time Powered by dry batteries, the continuous working time exceeds 1200 hours
8) High protection level and humanized design The whole body is waterproof; magnetic fit, lightweight and convenient
Product Details
AM-PPB-DO Dissolved oxygen measurement principle is based on electrochemical polarography process, the electrode is composed of platinum electrode (cathode) and silver electrode (anode), the electrode is immersed in the electrolyte, the sensor front set oxygen permeable film. When the electrode is working, a fixed polarization voltage is applied between the anode and the cathode. Oxygen molecules diffuse into the measuring loop through the membrane, resulting in REDOX reaction and diffusion current. The reaction process is as follows::
Anode:4Ag + 4Cl– → 4AgCl + 4e–
Cathode:O2 + 2H2O + 4e– → 4OH–
The size of the current is proportional to the concentration of oxygen in the sample to be measured. The current, together with the temperature signal measured inside the sensor, is sent to the transmitter, and the oxygen content is calculated by a function.
Technical Specification
| Specifications | |
| Modelesolution | AM-PPB-DO Portable ppb DO Meter |
| Range | 0.1μg/L~100μg/L，
100μg/L~20.0mg/L auto switch |
| Resolution | 0.1μg/L，Accuracy:1ug/L |
| Zero error | Less than 1μg/L |
| Response time | T90 Response time less than 15s |
| Temperature Sensor | NTC thermistor; accuracy: 0.1°C |
| Calibration | Air slope calibration, zero point calibration |
| Compensation function | Automatic temperature compensation,
Manual input of atmospheric pressure and salinity |
| Power supply | Four #7 alkaline batteries (built-in) |
| Battery Life | Can be used continuously for up to 1200 hours |
| Protection level | Instrument: IP67; Probe: IP68 |
| Host size | 164(L)×75(W)×17 (T) mm |
