TP-340 Acid-Base Concentration Meter by TimePower

Overview

The TP-340 Acid-Base Concentration Meter is a dedicated electrochemical process analyzer engineered for continuous, real-time measurement of acid and base concentration in aqueous solutions. It operates on the principle of conductometric titration equivalence point detection—leveraging precise conductivity sensing combined with temperature-compensated algorithmic analysis—to determine molar concentration (e.g., % H₂SO₄, % NaOH, % HCl) without chemical reagents or consumables. Designed for integration into industrial process streams, the TP-340 delivers stable, drift-free output under dynamic flow conditions typical in power plant demineralizer regeneration, chemical dosing control loops, pharmaceutical cleaning-in-place (CIP) validation, and food-grade caustic strength monitoring. Its core architecture complies with IEC 61508 functional safety fundamentals for non-safety-critical instrumentation and meets electromagnetic compatibility requirements per EN 61326-1.

Key Features

• Corrosion-resistant sensor assembly featuring platinum-coated stainless steel electrodes and PTFE-bodied flow cell—rated for continuous exposure to ≤20% w/w sulfuric acid, ≤15% w/w sodium hydroxide, and hydrochloric acid up to 10% w/w.
• Wide operational concentration range: 0.1–25.0% for common strong acids/bases, with resolution of 0.01% and repeatability ±0.1% full scale at 25 °C.
• Integrated Pt1000 RTD temperature sensor with automatic two-point thermal compensation (0–60 °C), ensuring consistent accuracy across seasonal ambient shifts and process temperature fluctuations.
• Embedded 24-bit sigma-delta A/D converter and ARM Cortex-M4 microcontroller enable high signal fidelity and low-noise analog front-end processing—minimizing interference from pump harmonics or grounding loops.
• 5.0-inch capacitive touch TFT-LCD display with graphical UI, supporting multilingual menu navigation (English default), real-time trend plotting, and intuitive calibration wizard workflows.
• Non-volatile FRAM memory retains configuration, calibration coefficients, and up to 100,000 timestamped data points with auto-rollover; data retention exceeds 10 years without battery backup.

Sample Compatibility & Compliance

The TP-340 is validated for use with clear, low-turbidity aqueous electrolyte solutions containing no suspended solids >5 µm or oil emulsions. It is not suitable for highly viscous media (>50 cP), oxidizing agents beyond standard process concentrations (e.g., >1% ClO⁻), or organic solvent mixtures. The instrument conforms to CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), RoHS 2011/65/EU, and supports audit-ready operation under ISO 9001:2015 and ISO/IEC 17025 quality systems. Optional 4–20 mA HART® v7.5 or Modbus RTU outputs facilitate integration into DCS/SCADA platforms compliant with ISA-84 and ISA-95 frameworks.

Software & Data Management

Configuration, calibration, and diagnostics are performed locally via the touchscreen interface or remotely via USB-C serial connection using TimePower’s PC-based Configuration Utility (v3.2+). The utility supports GLP-compliant audit trails—including user ID, timestamp, parameter change log, and calibration certificate export in PDF format. All stored measurements include embedded metadata: date/time, temperature, conductivity reading, calculated concentration, and status flags (e.g., “sensor fault”, “out-of-range”). Data export is supported in CSV format compatible with LIMS systems such as LabWare, STARLIMS, and Thermo Fisher SampleManager. Firmware updates maintain backward compatibility and are digitally signed to ensure integrity per NIST SP 800-193 guidelines.

Applications

• Power generation: Monitoring regenerant concentration in mixed-bed ion exchange resin systems and condensate polishing units.
• Chemical manufacturing: Closed-loop control of neutralization reactors and scrubber liquor strength in flue gas desulfurization (FGD).
• Pharmaceuticals: Verification of NaOH concentration during tank and piping CIP cycles per USP and FDA Guidance for Industry on Process Validation.
• Food & beverage: In-line verification of caustic soda concentration in equipment sanitation circuits, aligned with SQF Code Edition 9.0 Section 5.2.
• Metallurgy: Electrolyte management in electrowinning cells and pickling line rinse water recovery systems.

FAQ

What calibration standards are required for routine verification?
Standard KCl solutions (0.01 M and 0.1 M) are used for conductivity verification; certified acid/base reference standards traceable to NIM (China National Institute of Metrology) are recommended for concentration calibration.
Can the TP-340 be installed in hazardous areas?
No—the base model is rated IP65 for general-purpose indoor/outdoor use only; explosion-proof enclosures (Ex d IIB T4) require factory-installed customization and third-party certification.
Is remote firmware update supported over Ethernet or Wi-Fi?
Firmware updates are currently limited to USB-C local upload; Ethernet connectivity (TCP/IP Modbus TCP) is available as an optional module for data streaming but does not support OTA updates.
Does the device meet FDA 21 CFR Part 11 requirements for electronic records?
Yes—when operated with enabled user authentication, electronic signatures, and audit trail logging, the TP-340 satisfies predicate rule requirements for closed-system controls as defined in Part 11 Subpart B.
What is the recommended maintenance interval for electrode cleaning?
Visual inspection and gentle mechanical cleaning with lint-free cloth and deionized water every 30 days is advised; frequency increases proportionally with suspended solids or scaling tendency in the process stream.