Suitable for industrial and mining factories, power plant, aquaculture and environmental protection, especially for outdoor purposes.
Main Features
- Large LCD screen with controllable white backlight.
- Humanized designs like rack and skid proof shell make it more convenient for users.
- Built-in microprocessor chip with functions of auto calibration, auto temperature compensation, data storage, function setup, self-diagnosis, auto power off, low voltage display.
- Double-parameter and equipped with pH electrode and DO electrode, can recognize electrode automatically.
- Auto recognition of standard pH buffers and there are three series of standard buffers for option: USA, NIST and China.
- Able to set pH measurement modes of high purity water and pure water with ammonia.
- DO mode has functions of ATC, auto salinity compensation and auto pressure compensation.
- New structure polarographic DO electrode can measure temperature, salinity and dissolved oxygen simultaneously and equipped with special DO electrode calibration sleeve, only need 3~5 minutes for polarization.
- IP57 and there isoptionalcarrying case.
Specifications
| PH | Measuring range | (-2.00 ~ 19.99) pH |
| Resolution | 0.1/0.01 pH | |
| Accuracy | ±0.02 pH | |
| Input current | ≤2×10-12 A | |
| Input impedance | ≥1×1012 Ω | |
| Stability | ±0.01 pH/3h | |
| Temperature compensation | (0 ~ 100)℃ (automatic) | |
| mV | Measuring range | -1999mV ~ 0 ~ 1999mV |
| Resolution | 1 mV | |
| Accuracy | ±0.1% FS | |
| DO | Measuring range | (0 ~ 20.00) mg/L(ppm), (0 ~ 200.0)% |
| Resolution | 0.1/0.01 mg/L(ppm), 1/0.1 % | |
| Accuracy | ±0.40 mg/L, ±0.3% | |
| Response time | ≤30s (25℃, 90% response) | |
| Residual current | ≤0.1 mg/L | |
| Temperature compensation | (0 ~ 100)℃ (automatic) | |
| Salinity compensation | (0 ~ 45) ppt (automatic) | |
| Pressure compensation | (66 ~ 200) kPa (manual) | |
| Automatic calibration | Air saturated by water, water saturated by air | |
| Electrode type | Polarographic | |
| Others | Data storage | 200Â groups |
| Storage contents | Series number, measuring value, measuring unit and temperature | |
| Power | Two AA batteries(1.5V×2) | |
| Size & Weight | 160×90×30mm/360g (instrument)
480×300×60mm/1KG (with packing) |
|
| Working Conditions | Ambient temperature | (5 ~ 35)℃ |
| Ambient humidity | ≤85% | |
| IP grade | IP57 |
Standard Configuration
- P-521 pH/DO meter                                1 unit
- pH electrode                                      1 pc
- DO electrode                                      1 pc
- Temperature electrode                              1 pc
- pH buffer (pH4.00, pH6.86, pH9.18/50ml)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1 set
- Membrane cap                                     3 pcs
- DO electrolyte (30ml in powder)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1 bottle
- Backup AA battery                                  2 pcs
- Operation manual                                  1 copy
