The clever online dissolved oxygen controller A20DOH designed for high-temperature fermentation. Temperature and dissolved oxygen are reliably detected simultaneously. A programmable relay, several temperature control features, and an independent signal output allow for easy switching between Chinese and English interfaces. The CSS-100 stainless steel installation kit and TS-100-5M high-temperature fermentation DO electrode are ideal for monitoring fermentation and treating wastewater in the environment.Even at high temperatures, it gives trustworthy data for regulating water quality and making processes better.
★★★★★
Features
Specifications
| Category | Specifications |
|---|---|
| Measurement Range | Dissolved Oxygen (DO): 0.1μg/L (ppb) ~ 20.00mg/L (ppm), 0 ~ 200.0% SaturationTemperature: 0 ~ 130℃ (compensation range), electrode measurement tolerance: 0 ~ 60℃ |
| Measurement Accuracy | Dissolved Oxygen: ±1.0% F.STemperature: ±0.3℃ |
| Resolution | Dissolved Oxygen: 0.01mg/L, 0.1% SaturationTemperature: 0.1℃ |
| Stability | ≤0.02ppm/24 hours |
| Temperature Compensation | Dual modes: Automatic (PT1000/NTC10K) / Manual; compensation range: 0 ~ 130℃ |
| Signal Output | 2 channels of 4~20mA isolated output (corresponding to DO value and temperature respectively), maximum load resistance: ≤500Ω; optional RS485 Modbus RTU communication |
| Alarm Output | 3 groups of normally open contact relays (3A/250VAC), supporting 8 alarm modes (High Point/Low Point/Inside Range/Outside Range, etc.); including 1 set of electrode automatic cleaning device contact |
| Power Supply | Optional AC220V or DC24V; power consumption: ≤7W |
| Physical Parameters | Dimensions: 144×144×115mm (H×W×D)Cutout Size: 138×138mm (H×W)Mounting Type: Panel-mounted, Wall-mounted (dual modes) |
| Operating Environment | Ambient Temperature: 0~50℃Relative Humidity: ≤85%RH (no strong magnetic interference) |
Standard Configuration
- Host: A20DOH
- Dissolved oxygen electrode: TS-100-5M
- Side-wall stainless steel kit: CSS-100
Core Highlights
- Extremely high stability: 24-hour stability <0.02 ppm, digital filtering (5/10/20 second mean) for data stabilization and isolation technology to withstand electromagnetic interference.
- Flexible installation: Wall-mounted and side-wall stainless steel kits and panels provide a quick and easy way to meet a variety of on-site installation requirements.
- Thirty alarm records for simple traceability, menu prompts, password management, and the ability to switch between Chinese and English interfaces are all clever and practical features.
- Three sets of relays with automated cleaning contacts, adjustable hysteresis, and pressure and salinity parameter correction for challenging water quality conditions are practical features.
Featured Applications
- Biological fermentation: Monitoring dissolved oxygen levels in real time during antibiotic, vaccine, biologic, and other fermentations, as well as using oxygen delivery devices to make the reaction work better.
- Environmental wastewater: Keeping an eye on the quantities of dissolved oxygen in high-temperature wastewater treatment processes to make sure there is enough air.
- Chemical production: Keep an eye on the amount of dissolved oxygen in high-temperature reaction systems to stop strange oxidation reactions from happening.
- The pharmaceutical and food fermentation sectors need to keep an eye on the quality of the water while working with medium to high temperatures.
Daily maintenance and precautions
Maintenance points
- Electrode maintenance: Calibrate regularly (1-3 months), clean with neutral detergent when pollution is severe, and avoid using strong acids and alkalis; When not in use for a long time, it needs to be soaked in a specialized protective solution.
- Instrument maintenance: Keep the casing clean and avoid direct sunlight and corrosive environments; Check the relay contacts and wiring terminals once a year to prevent oxidation.
- Cable maintenance: Avoid pulling or bending cables. Special shielded wires should be used to extend cables, and the length should not exceed 30 meters.
Safety precautions
- Before installation and wiring, the power must be disconnected and operated by professionals to avoid the risk of electric shock.
- When connecting a relay to high-power equipment, an additional intermediate relay needs to be installed to prevent contact overload damage.
- If there is surge interference in the power supply, an independent power supply should be provided for the controller, separate from the power supply of equipment such as the dosing machine and mixer.
- The electrode installation must be well sealed with waterproofing, and it is strictly prohibited for water to enter the inside of the electrode or the wiring terminals, otherwise it may cause short circuit faults.
Technical Support
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The A20DOH online dissolved oxygen controller is tailored for harsh scenarios such as fermentation, with the core values of “high temperature adaptation, stability, precision, convenience, and practicality”. From flexible installation to intelligent operation, from high temperature tolerance to automatic maintenance, it fully meets the core requirements of industrial continuous monitoring. Paired with specialized high-temperature electrodes and installation kits, a complete monitoring solution is formed to assist users in optimizing processes and improving efficiency.
We provide professional selection guidance, installation support, and after-sales service. If you need technical consultation or accessory procurement, please feel free to contact us at any time to make water quality monitoring more efficient and worry free!
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