The RA-2083S is a high-quality online acid-base concentration meter that can always find HCl and NaOH (0–10% and 0–22%) by monitoring sine waves. It contains two sets of relays, a smart menu, a Chinese LCD screen, a number of ways to convey signals, and the possibility to manage the temperature manually or automatically. It’s simple to set up and gives you exact information that you can use to keep track of and obey requirements in the chemical sector, power plants, environmental protection, and other fields.
★★★★★
Features
- Dot matrix LCD screen display, intelligent menu operation
- Multiple automatic calibration functions, multiple signal output methods
- Manual and automatic temperature compensation
- Two sets of relay control switches, high limit, low limit, and hysteresis control
- Display acid/alkali/salt concentration, temperature, status, etc. on the same interface
Parameters
| Category | Specifications |
|---|---|
| Measurement Range | Acid/Alkali/Salt concentration: 0-10% (HCl/HNO₃/NaOH/H₂SO₄/NaCl) / 0-22% (CaCl₂) |
| Accuracy | ±1.0% F.S ±1 digit; Temperature: ±0.5℃ |
| Resolution | Concentration: 0.01%; Temperature: 0.1℃ |
| Temperature Compensation | Automatic/Manual, 0-150℃ (reference temperature 25℃); Compensation error: ±0.3% F.S |
| Stability | ±0.1% F.S ±1 digit / 24h |
| Output & Communication | 0-10mA/4-20mA/20-4mA (2 channels optional); RS485 Modbus RTU |
| Relay Control | 2 groups (3A 240VAC, 3A 28VDC/120VAC); High/low limit & adjustable hysteresis |
| Power Supply | 85-265VAC ±10% (50±1Hz) or 9-36VDC; Power ≤3W |
| Physical Specifications | Dimension: 98×98×130mm; Mounting hole: 93×93mm; Weight: ~0.6kg; Protection class: IP65 |
| Operating Environment | Temperature: -10~60℃; Relative humidity: ≤90%; No strong magnetic interference |
Standard Configuration
- Host: RA-2083S
- Acid alkali salt concentration electrode
- Electrode flow channel
Acid alkali salt concentration electrode
| Technical Specifications Electrode coefficient | 30.0 |
| Temperature and pressure resistance | 0—80℃； 0—0.3MPa |
| Cable length | Standard 10 meters, customizable |
| Boundary material | Glass+Pt coated with platinum black |
| Shell material | polysulfone |
| threaded connection | G3/4” |
Acid alkali salt concentration electrode flow channel
Core Highlights
- Through the use of sine wave signals, programmable amplification, and phase sensitive detection technology, the measurement stability reaches ± 0.1% F.S/24h and good anti-interference capabilities.
- Adaptable to 6 common solution types (NaOH, CaCl ₂, NaCl, etc.), configurable temperature coefficient, and various industrial media monitoring.
- Easy to use: Chinese menu+touch buttons, concentration, temperature, and functioning status on the same screen, straightforward parameter adjustments, password protection to avoid misoperation;
- Flexible installation: compatible with flow, pipeline, and flange methods. The electrode cable can be extended to 100 meters for sophisticated on-site work;
- Intelligent control: Two sets of relays support high and low limit alert and hysteresis control and can be linked to dosing, sewage, and other equipment for process automation;
- Easy to maintain: Regular usage requires no calibration, electrode cleaning and replacement are simple, and password retrieval and error correction reduce operating and maintenance costs.
Featured Applications
- Power plant industry: Monitoring cooling, makeup, condensate, and other water acidity and alkalinity to prevent equipment corrosion and scaling;
- Petrochemical industry: acid-base neutralization reaction tank concentration control, real-time tracking during chemical raw material processing;
- Environmental water treatment: monitoring industrial wastewater acidity and alkalinity, complying with discharge standards, and adjusting to sewage treatment plant process control;
- Metallurgical industry: monitoring smelting circulation water and acid washing process solution concentrations, optimizing output, and enhancing product quality;
Daily maintenance and precautions
Key usage precautions
- Maintenance of electrodes: Dry and waterproof cables and connectors reduce corrosion; circulate solution smoothly to prevent electrode core hole obstruction.
- When idle, clean before storing; To fix slight temperature or concentration concerns, utilize the after-sales service menu and password 1234.
- Set alarm high and low limits and hysteresis suitably to avoid relay starting and stopping. If the high alert value is 10% and the hysteresis is 0.5%, the alarm will sound when the concentration surpasses 10% and stop when it dips below 9.5%;
- If “OVER_LIMIT_SRROR” happens, examine solution concentration or electrode contact or failure.
Maintenance and Care
- Cleaning the instrument housing every day keeps dust and liquids from sticking to it. Check the electrical connections for rust and clean them right away. Check the electrodes once a month, clear any debris from the surface, and make sure that contamination doesn’t affect the measurement.
- It is best to calibrate every three to six months. When the measurement environment or data changes a lot, calibration is necessary;
- Change the electrode: If the electrode response is delayed and the calibration error is big, you should replace the fitted electrode. To replace it, you need to reenter and calibrate the electrode constant.
- Over time, you should not use the instrument again. Before you do, disconnect the power source, clean and store the electrodes, put the instrument in a dry, well-ventilated place, and check and calibrate the wiring.
Technical Support
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The RA-2083S acid-base salt concentration meter is reliable, accurate, and may be utilized in many businesses that need to know the concentration of industrial media. Businesses may follow environmental standards and make their operations operate more smoothly by employing smart control and a maintenance design that is easy to use. This makes it a wonderful tool for keeping an eye on and controlling the amounts of salt, acid, and alkali in factories.
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