Overview
A low-range conductivity interface ASIC optimized for purified water and precision low-conductivity applications. The measurement core, NTC correction and UART output are integrated in SOP8.
Sensor Interface ASICsCurrent model
BA121S
Low-range Conductivity Interface ASIC | TDS sensor IC
High-resolution low-conductivity measurement ASIC for purified-water and precision applications.
Original manufacturer · Factory-direct supply
Questions go straight to the source
Ask about parameters, interfaces, calibration, versions, customization or volume supply. The answer does not need to pass through layers of resellers.
- In-house R&DOptics, sensor-interface electronics, algorithms, firmware and mechanical integration are developed as one product system.
- Production capabilityFrom prototype and pilot build to assembly, functional testing and volume delivery, production follows the product team’s technical definition.
- Quality traceabilityModel, specification, firmware or hardware version and test requirements remain connected, reducing ambiguity between sales claims and delivered goods.
Overview
Why this product
High-resolution low-conductivity measurement ASIC for purified-water and precision applications.
A low-range conductivity interface ASIC optimized for purified water and precision low-conductivity applications. The measurement core, NTC correction and UART output are integrated in SOP8.
High-resolution low-conductivity measurement ASIC for purified-water and precision applications.
- ✓0.1 µS/cm resolution
- ✓Automatic temperature correction
- ✓Single-channel conductivity measurement
- ✓Bipolar drive reduces polarization
- ✓UART-controlled compact design
Verified technical detail
Information to provide for selection · Calibration, validation and maintenance
High-resolution low-conductivity measurement ASIC for purified-water and precision applications.
Interface / Supply
UART command control · 3.3 V
Measurement Range / Accuracy
0–100 µS/cm · < 2% F.S.
Installation and commissioning
Treat power-supply noise, board leakage and connector contamination as part of the error budget.
Verified technical detail
Engineering and integration
The official Chinese document is currently shared by every language version.
Engineering and integration
- 01
0–100 µS/cm range with 0.1 µS/cm resolution and error below 2% F.S.
- 01
0–100 °C temperature range with ±0.5 °C reference accuracy.
- 01
3.3 V supply; ripple below 10 mV is specified for low-level measurement stability.
- 01
UART 9600 bps command interface and current below 3 mA.
Installation and commissioning
- ✓
Treat power-supply noise, board leakage and connector contamination as part of the error budget.
- ✓
Use a probe and cell constant intended for low-conductivity water.
- ✓
Validate zero behavior and span using freshly prepared low-conductivity standards.
Product and document views
Public documents
BA121S 中文规格书Applications
Typical applications
Use the product as part of a complete measurement workflow, not as an isolated component. Confirm the water matrix, target range and decision that the data must support.
Drinking Water & Purification
Integrated TDS and conductivity components for dispensers, purifiers, filter-life estimation and quality indication.
Industrial Process Water
Digital sensors and embedded ASICs for equipment builders, automation systems and water-intensive production.
Smart Appliances
Small-footprint sensing electronics for connected water devices, pet appliances and intelligent home products.
Typical applications are reference cases, not capability limits.
Propose a new application →The applications above are common examples. If this measurement principle may solve a different problem in your field, we welcome a feasibility discussion.
Technology
From selection to reliable data
- 01
Define the measurement objective and expected range.
- 02
Match the sensor, probe or analyzer to the real sample matrix.
- 03
Complete mechanical, electrical and communication integration.
- 04
Validate results with reference samples before routine operation.
Engineered for dependable integration
Integration and installation checklist
- ✓Target parameters and expected concentration range
- ✓Water matrix, fouling risk and installation method
- ✓Communication interface and sampling frequency
- ✓Calibration, validation and maintenance strategy
- ✓Information to provide for selection: BA121S · Sensor Interface ASICs
Calibration, validation and maintenance
Validate the complete system with representative samples. Record the reference method, temperature and installation conditions. Recheck after cleaning, replacement or process changes, and define a maintenance interval from actual fouling rather than a fixed assumption.
FAQ
Frequently asked questions
Is this product ready to use in every water matrix?
The product platform is defined, but range, calibration and installation must still be confirmed against the actual water matrix and project objective.
What should be checked before integration?
Confirm power, interface, cable length, enclosure, sampling frequency, probe position and the host system data format.
How should measurement quality be verified?
Compare representative samples with an agreed reference method and document the acceptance criteria before commissioning.
Can datasheets, protocol information and engineering support be supplied?
Yes. Ask for the current ordering specification and describe your application so the correct materials can be supplied.
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