Portable optical dissolved oxygen meter
Portable dissolved oxygen and temperature meter with a low-maintenance optical probe for aquaculture and environmental monitoring.

The built-in microprocessor enables advanced functions, such as automatic calibration, automatic temperature compensation, self-diagnosis, auto power-off, and low-battery indicator, and improves the response time and accuracy of your measurements.
The MAX portable Dissolved Oxygen/Temperature meter is water resistant (IP65) and feature a large LCD display that provides simultaneous D.O. and temperature readings with a resolution of 0.01 mg/L and an accuracy of ± 0.3mg/L (0 a 10.00 mg/L).
The AK1030 Optical probe with built-in temperature sensor, means accurate measurements, holds calibration longer, no stirring required, no probe or membranes to clean.
Optical dissolved oxygen sensors combine precise measurement with low maintenance to monitor the dissolved oxygen level water applications. The AK121 MAX is ideal for Aquaculture and Environmental applications.

Applications
| Measurement Specifications | |||
| Parameter | Range | Resolution | Accuracy |
|---|---|---|---|
| Dissolved Oxygen | 0.00 to 20.00 mg/L | 0.01 / 0.1 mg/L | ±1.5 % of reading ±1 digit |
| 0.0 to 200.0 % sat | 0.1 % | — | |
| Temperature | 0.0 to 50.0 °C | 0.1 °C | ± 0.5 °C |
| General Specifications | |
| Calibration points | 2 points: 100 % and 0 % saturation |
| Altitude Compensation | Up to 1999 m |
| Salinity Compensation | up to 100 ppt |
| Probe operating temperature | 0 to 50 °C |
| Memory | 100 records |
| Display backlight | On/Off |
| Auto power-off | 10 minutes |
| Freezing the reading (HOLD) | Manual |
| Protection rating | IP65 |
| Operating humidity | 10 to 90 % RH (non-condensing) |
| Charge indicator | Visual |
| Battery | 3.7 VDC 3000 mAh (rechargeable) |
| Power adapter | 9 V 1 A (110–220 VAC) |
| Power connector | 2.5 mm jack (P4) |
| Dimensions | 83 x 175 x 34 mm |
| Weight | 250g |
Replacement parts, calibration solutions, and maintenance supplies for the AK121.
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