Drick DRK-PH40 Automated pH Tester for Textile Fabrics

Overview

The Drick DRK-PH40 Automated pH Tester for Textile Fabrics is a dedicated benchtop instrument engineered to perform standardized, reproducible pH measurements on aqueous extracts of woven, knitted, and nonwoven textile materials. It operates in full compliance with ISO 3071:2019 (“Textiles — Determination of the pH value of aqueous extracts”) and AATCC Test Method 81 (“pH of Textiles”), employing a calibrated glass combination electrode, precision temperature-compensated potentiometric measurement, and automated sample handling to eliminate operator variability. The system integrates a peristaltic pump, programmable extraction agitator, thermostatically controlled water bath (±0.5 °C), and auto-calibrating electrode module—ensuring traceable, GLP-aligned results across batch testing environments typical of textile QC laboratories, dyeing houses, and third-party certification labs.

Key Features

• Fully automated workflow: From standardized fabric extraction (60 min @ 25 °C or 30 min @ 40 °C per ISO 3071) to electrode immersion, stabilization, and endpoint reading—requiring no manual pipetting or timing intervention.
• Integrated temperature-controlled extraction bath with PID regulation and digital setpoint verification, ensuring thermal consistency critical for extract pH stability.
• Auto-calibrating pH electrode module with dual-point calibration (pH 4.01 and 7.00 buffers), real-time slope monitoring, and automatic electrode diagnostics (offset, asymmetry potential, response time).
• Onboard data logging with timestamped records for each test—including sample ID, extraction parameters, calibration history, raw mV output, temperature, and final pH result—exportable via USB to CSV or PDF.
• Rugged industrial-grade housing with IP54-rated enclosure, corrosion-resistant fluid pathways, and modular maintenance design for long-term operation in humid, high-salt laboratory environments.
• Compliance-ready audit trail: All user actions, calibration events, and measurement logs are immutably timestamped and stored locally—supporting internal GLP audits and pre-qualification for ISO/IEC 17025 accreditation.

Sample Compatibility & Compliance

The DRK-PH40 accommodates standard textile specimens per ISO 3071: 2.0 g ± 0.05 g of conditioned fabric (equilibrated at 20 °C ± 2 °C and 65 % RH ± 4 %) extracted in 100 mL deionized water (conductivity ≤ 2 µS/cm). Compatible with cotton, polyester, wool, blends, denim, technical textiles, and coated fabrics. Not intended for viscous pastes, solid polymers, or non-aqueous matrices. Certified compliant with ISO 3071:2019, AATCC TM81-2022, GB/T 7573–2009, and OEKO-TEX® Standard 100 Annex 6 requirements for residual acidity/alkalinity screening. Meets mechanical and electrical safety standards IEC 61010-1 and GB 4793.1.

Software & Data Management

The embedded firmware supports standalone operation without PC dependency. Optional DRK-LabLink software (Windows 10/11) enables remote instrument control, method template management, statistical process control (SPC) charting (X̄–R charts), and automated report generation per ISO/IEC 17025 clause 7.8. All data files include digital signatures and are structured to meet FDA 21 CFR Part 11 requirements when used with validated electronic signature modules. Audit logs record operator ID, login/logout timestamps, method modifications, and result overrides—retained for ≥12 months unless archived externally.

Applications

• Final product release testing for apparel, home textiles, and medical gowns per OEKO-TEX®, GOTS, and bluesign® chemical limits.
• In-process pH monitoring during scouring, bleaching, and neutralization stages in wet processing mills.
• Supplier qualification and incoming material verification against brand-specific pH specifications (e.g., ≤7.5 for infant wear per ASTM D6802).
• Root cause analysis of skin irritation complaints linked to residual alkalinity in dyed cotton or acidic residues in polyester dye baths.
• Supporting sustainability reporting by documenting compliance with ZDHC MRSL v3.1 Appendix 1 (pH range 4.0–7.5 for wastewater discharge).

FAQ

Does the DRK-PH40 comply with ISO 3071:2019’s requirement for mechanical agitation during extraction?
Yes—the built-in magnetic stirrer delivers consistent 60 rpm agitation throughout the defined extraction period, verified via integrated tachometer feedback.
Can the system store calibration data across power cycles?
Yes—calibration coefficients, date/time stamps, and electrode serial numbers are retained in non-volatile memory for ≥10 years without battery backup.
Is third-party validation support available for IQ/OQ/PQ protocols?
Drick provides documented IQ/OQ templates aligned with ISO/IEC 17025 and offers on-site PQ assistance through certified field application engineers.
What maintenance intervals are recommended for routine operation?
Electrode cleaning: after every 10 samples; buffer replacement: daily; tubing inspection: weekly; full system verification: quarterly using NIST-traceable pH standards.
Does the instrument support multi-language UI for global lab deployment?
Yes—English, Spanish, German, French, and simplified Chinese interfaces are preloaded and selectable via system settings.