Leici PHBJ-260F Portable pH Meter

Overview

The Leici PHBJ-260F Portable pH Meter is a high-precision, field-deployable electrochemical analyzer engineered for reliable pH and redox potential (mV) measurements across diverse environmental, industrial, and laboratory applications. Based on potentiometric measurement principles—where the electromotive force (EMF) generated at the interface between a glass pH electrode and sample solution is converted into a pH value—the instrument delivers traceable, stable readings under variable ambient conditions. Its extended pH range of −2.00 to 20.00 accommodates highly acidic or alkaline samples commonly encountered in wastewater treatment, electroplating baths, chemical synthesis, and semiconductor cleaning processes. Designed for operational robustness, the PHBJ-260F integrates temperature-compensated measurement logic using an integrated thermistor sensor, enabling automatic or manual temperature correction per ISO 7027 and ASTM D1293 guidelines. With a certified accuracy of ±0.01 pH and ±0.2 °C temperature uncertainty, it meets the performance requirements for Class 0.01 pH meters as defined in IEC 62264-2 and JJG 119–2018 (Chinese national metrological verification regulation).

Key Features

• High-resolution 4.3-inch color TFT touchscreen with adjustable backlight for legible operation under low-light or outdoor conditions
• Multi-language interface supporting English and Simplified Chinese for international field teams and bilingual lab environments
• Selectable resolution modes: pH (0.01 or 0.1), mV (0.1 or 1), and temperature (0.1 °C/°F)
• Intelligent endpoint detection algorithm with configurable read modes—auto-hold, timed reading, interval logging, and manual capture—to accommodate kinetic equilibration behaviors of viscous or low-conductivity samples
• Five-point pH calibration capability with auto-recognition of GB, DIN, and NIST standard buffer sets; supports user-defined buffer groups and custom calibration protocols
• IP65-rated enclosure ensuring dust-tight integrity and protection against water jets—suitable for humid laboratories, field sampling sites, and production floor use
• Integrated rechargeable lithium-ion battery with real-time charge-state indicator, low-voltage warning, and dual charging options (USB-PD compatible power banks or 5 V DC wall adapter)

Sample Compatibility & Compliance

The PHBJ-260F is optimized for aqueous and mildly aggressive liquid matrices, including process streams, natural waters, food extracts, pharmaceutical buffers, and cleaning solutions. It accepts standard BNC-input pH electrodes—including triple-junction, gel-filled, and refillable reference configurations—and is validated for use with Leici’s bundled tri-combination pH electrode (model E-201F). The device complies with GLP (Good Laboratory Practice) data integrity requirements through embedded audit-trail functionality: each stored measurement records timestamp, electrode ID (if encoded), calibration history, temperature, operator ID (optional), and environmental metadata. All data export paths—including RS-232 printer output and USB PC transfer—support traceable, non-modifiable record generation aligned with FDA 21 CFR Part 11 electronic record controls when used with validated communication software.

Software & Data Management

Data handling is structured around secure, auditable workflows. Up to 1000 complete measurement records—including raw pH/mV values, temperature, calibration parameters, and user notes—are stored internally with time/date stamping. Retrieval supports chronological, parameter-filtered, or curve-based visualization (e.g., pH drift over time). Export occurs via USB mass-storage mode or proprietary Leici PC software (compatible with Windows 10/11), enabling CSV or XML formatting for LIMS integration (e.g., Thermo Fisher SampleManager, LabVantage). Firmware updates are delivered via signed binary packages to preserve cryptographic integrity and prevent unauthorized modification—a critical requirement for regulated QC/QA environments operating under ISO/IEC 17025 or GMP Annex 11.

Applications

• Environmental monitoring: Field testing of surface water, groundwater, and effluent pH per EPA Method 150.1 and ISO 10523
• Pharmaceutical manufacturing: In-process control of buffer preparation, cleaning validation rinsates, and API crystallization endpoints
• Food & beverage quality assurance: Monitoring acidification steps in dairy fermentation, vinegar production, and juice stabilization
• Academic teaching labs: Student experiments requiring rugged, intuitive instrumentation with multi-standard calibration flexibility
• Industrial maintenance: Routine verification of cooling tower chemistry, boiler feedwater alkalinity, and electroplating bath stability

FAQ

What calibration standards does the PHBJ-260F recognize automatically?

It identifies pre-programmed GB (China), DIN (Germany), and NIST (USA) buffer sets—covering pH 1.68, 4.01, 6.86, 7.00, 9.18, 10.01, and 12.45—without manual selection.
Can the instrument log measurements at fixed intervals without user intervention?

Yes—interval logging mode supports programmable sampling periods from 1 second to 24 hours, ideal for unattended stability studies.
Is the USB interface compatible with modern LIMS platforms?

When paired with Leici’s certified communication driver, it supports HL7 and ASTM E1384-compliant data transmission for direct ingestion into enterprise LIMS.
Does the device meet international electrical safety and EMC requirements?

It conforms to IEC 61010-1 (safety) and IEC 61326-1 (EMC) for portable measurement equipment, with CE marking documentation available upon request.
How is data integrity maintained during power loss?

Non-volatile flash memory retains all stored data and calibration settings even after complete battery depletion or unexpected shutdown.