Acid Alkali Salt Concentration Meter：RB-2084S

Q: How to use the RB-2084S's cleaning feature to keep the electrodes in good shape without help?

To do this, go to "Alarm Settings - Relay Three" and change "Designated Type" to "Cleaning Output." In "On Time" and "Off Time," set the times that the cleaning equipment will operate and the times that it will take a break (for example, 5 minutes on and 10 minutes off). For "Cleaning Status," either "Hold" (which will freeze data while cleaning) or "Continuous" (which will collect data in real time). The instrument will then automatically start cleaning to cut down on how often it needs to be cleaned.

Q: <strong>RB-2084S supports curve query function. How long can the measurement trend be viewed?</strong>

Support querying the curve trends of the last 200 recorded points, combined with over 110000 sets of data storage capacity. If recorded at 5-minute intervals, the trend can be traced back to the past month, making it easy to quickly analyze concentration changes and assist in process optimization.

Q: <strong>How to set up instruments for media that require monitoring within a custom concentration range?</strong>

Enter "Calibration Settings - Custom Backup" and set a minimum of 2 and a maximum of 10 concentration conductivity corresponding points (such as a concentration of 5% corresponding to a conductivity of 800 μ S/cm, and 10% corresponding to a conductivity of 1500 μ S/cm). After inputting, the instrument will automatically fit the curve, and the concentration value will be calculated according to the custom curve for subsequent measurements, suitable for non-standard medium monitoring.

The RB-2084S is a precise industrial online acid-base salt concentration meter. It works on an AC pulse signal and can accurately measure 10 points of custom concentration (0-10%/0-22% CaCl ₂) and 6 types of preset medium. It has options in both Chinese and English, three sets of relay control, and more than 110,000 sets of data storage. It can be placed on a disk or the wall, and it is widely used in chemical, thermal power, and other fields to measure and control things in difficult working conditions.

★★★★★

Short delivery time
Better price
Customizable parameters

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); 10-point custom concentration
Temperature Range	0~80℃; Resolution: 0.1℃; Accuracy: ±0.3℃
Concentration Accuracy	±0.25% F.S; Resolution: 0.01%
Stability	±0.1% F.S / 24h
Temperature Compensation	Automatic/Manual, 0~80℃ (reference 25℃); Compensation error: ±0.1% F.S
Output & Communication	2 channels 4-20mA/0-20mA/20-4mA (load <750Ω); RS485 Modbus RTU
Relay Control	3 groups (3A 250VAC, 3A 28VDC/120VAC); High/low limit & adjustable hysteresis; Cleaning control (Relay 3)
Power Supply	85-265VAC ±10% (50±1Hz) or 9-36VDC; Power ≤3W
Physical Specifications	Dimension: 144×144×118mm; Mounting hole: 138×138mm; Weight: ~0.8kg; Protection class: IP65
Operating Environment	Temperature: -20~60℃; Relative humidity: ≤90%; No strong magnetic interference
Data Storage	113,792 data points; 1-month storage (1 point/5min); 10-year power-off retention

Standard Configuration

Host: RB-2084S
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

Accurate and stable: ± 0.25% F.S concentration accuracy, ± 0.1% F.S/24-hour stability, precise temperature compensation;
Function upgrade: Three sets of relays+cleaning control, supporting 10 point custom concentration, suitable for diverse needs;
Data Intelligence: Stores over 110000 sets of data, supports curve queries and uploads, and facilitates trend tracing;
Easy to operate: bilingual in Chinese and English+6-key touch, multi-mode display adjustment, suitable for different scenarios;
Flexible installation: Dual mode disk/wall mounting, multiple electrode installation methods, suitable for complex sites.

Featured Applications

Chemical industry: Real time monitoring of acid-base neutralization reactor concentration, precise control of reaction process, avoiding waste of raw materials or insufficient reaction;
Thermal power industry: HCl concentration control in boiler acid washing process, monitoring of NaOH concentration in ion exchange regeneration solution to prevent equipment corrosion;
Environmental water treatment: monitoring the acidity and alkalinity concentration of industrial wastewater, linking with the sewage discharge system to ensure that the discharged water quality meets the standards;
Metallurgical industry: Control the concentration of CaCl ₂ in smelting circulating water to avoid pipeline scaling and ensure stable operation of the circulation system;

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

To do this, go to “Alarm Settings – Relay Three” and change “Designated Type” to “Cleaning Output.” In “On Time” and “Off Time,” set the times that the cleaning equipment will operate and the times that it will take a break (for example, 5 minutes on and 10 minutes off). For “Cleaning Status,” either “Hold” (which will freeze data while cleaning) or “Continuous” (which will collect data in real time). The instrument will then automatically start cleaning to cut down on how often it needs to be cleaned.

Support querying the curve trends of the last 200 recorded points, combined with over 110000 sets of data storage capacity. If recorded at 5-minute intervals, the trend can be traced back to the past month, making it easy to quickly analyze concentration changes and assist in process optimization.

Enter “Calibration Settings – Custom Backup” and set a minimum of 2 and a maximum of 10 concentration conductivity corresponding points (such as a concentration of 5% corresponding to a conductivity of 800 μ S/cm, and 10% corresponding to a conductivity of 1500 μ S/cm). After inputting, the instrument will automatically fit the curve, and the concentration value will be calculated according to the custom curve for subsequent measurements, suitable for non-standard medium monitoring.

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RB-2084S is the most common update for measuring and managing acid-base levels in industry since it offers a lot of functions, is very precise, and is easy to customize. We fully satisfy the needs of harsh working conditions by giving thermal power, water treatment, and chemicals robust and reliable measurement and control assistance. This makes the process work better and keeps it safe.

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