Water quality measurement equipmentDissolved oxygen meter(DO meter)
This meter is optimal for air volume control and management for bioreactor vessel . This meter can be applied to float type detectors in the river basin.
Product Features
Dissolved oxygen (DO) is necessary for many microbes living in water. Therefore, it is very important to control concentration of dissolved oxygen properly for artificial facilities including sewerage treatment facilities and fish farms. In addition, dissolved oxygen is an effective index for pollution levels in rivers, lakes and marshes.
This meter is a latest high functional and high performance model of our bubble cleaning type DO meter with our expertise developed for many years. This meter can be applied to float type detectors in the river basin.
- This meter enables measurement during cleaning because it has a little impact from bubble cleaning. (*1)
- Since the continuous cleaning is possible, frequency of maintenance can be reduced. (*1)
- Stable measurement can be performed even with stagnant water by keeping the clean electrode surface. This is made possible by blowing the external air around the electrode surface or by its subsequent water stream on the surface. (*1)
- Simple configuration and easy maintenance are achieved with cleaning by keeping the electroe surface clean by above external air blow or its subsequent water stream. (*2)
- The electrode is of edge detection type polarograph electrodes for easy maintenance.
- Various correction processes are available. (Altitude correction, chloride ion correction, etc.)
- Various parameters can be changed.
- Settings are easy with interactive mode.
- The equipment conditions can be checked easily with the built-in self-diagnostic function.
- As the display is in Japanese, its guidances are easy to read.
*1: When using the bubble cleaning holder
*2: When using the floating type holder3
Specifications
| Item | DO計 | ||
|---|---|---|---|
| Type | DOP-511 | DOP-511F | |
| Measuring object | Dissolved oxygen (DO) | Dissolved oxygen (DO) | |
| Measuring method | Diaphragm polarograph type | Diaphragm polarograph type | |
| Maximum scale | 3 to 20 mg/L(FS) (Setting is possible in units of 1 mg/L.) |
3 to 20 mg/L(FS) (Setting is possible in units of 1 mg/L.) |
|
| Measurement accuracy | Repeatability | ±0.1mg/L and less | ±0.1mg/L and less |
| Response speed | 90% response Approximately 60 seconds (25°C) | 90% response Approximately 60 seconds (25°C) | |
| Temperature of measurement liquid | 0 to 40°C (no freezing) | 0 to 40°C (no freezing) | |
| Output signal | DC4 to 20 mA (maximum load resistance: 600 Ω, isolated output) | DC4 to 20 mA (maximum load resistance: 600 Ω, isolated output) | |
| Contact output | Classification | (Upper and lower limit alarm, during maintenance, abnormality of meter) | (Upper and lower limit alarm, during maintenance, abnormality of meter) |
| Capacity | AC100 0.5A、DC24V 0.5A | AC100 0.5A、DC24V 0.5A | |
| Surrounding environmental condition | Temperature | -5 - 45°C | -5 - 45°C |
| Humidity | 90%RH or less | 90%RH or less | |
| Power source | AC100 V±10% 50/60 Hz Single phase 10 VA | AC100 V±10% 50/60 Hz Single phase 10 VA | |
| Weight | Transformer part | Approximately 7 kg | Approximately 7 kg |
| Transformer part | Approx. 7 kg | Approx. 7 kg | |
| Required air volume | 20 to 40 L/min (at the time of immersion*) | None | |
| Required flow rate | None | 20 cm/s or more | |
- * Air source is required separately.