YSI pH10 Portable pH and Temperature Pen Meter

Overview

The YSI pH10 Portable pH and Temperature Pen Meter is an engineered field-deployable instrument designed for rapid, reliable, and traceable measurement of aqueous pH and temperature in environmental monitoring, wastewater treatment, aquaculture, educational laboratories, and routine water quality verification. Based on a robust potentiometric measurement principle using a combination glass pH electrode and integrated Pt1000 temperature sensor, the device delivers high reproducibility (±0.02 pH units) and stable thermal response across a wide operational range. Its compact pen-form factor—optimized for one-handed operation—integrates precision sensing with ruggedized industrial design, enabling consistent performance under variable ambient conditions without requiring external power supplies or complex calibration infrastructure.

Key Features

• High-accuracy pH measurement: ±0.02 pH at 25°C, with 0.01 pH resolution and automatic temperature compensation (ATC) from 0.0 to 99.9°C
• Integrated dual-sensor architecture: Simultaneous real-time pH and temperature readout with 0.1°C resolution and ±0.3°C accuracy
• IP67-rated housing: Fully dust-tight and submersible up to 1 meter for 30 minutes—validated per IEC 60529—ensuring operational integrity in rain, splashing, or temporary immersion
• GLP-compliant data management: Non-volatile memory stores 50 measurement records, each timestamped with date, time, pH value, and temperature; full calibration history—including buffer type, calibration points, and date/time—is retained
• Intuitive graphical LCD display: Shows pH, temperature, battery status, calibration mode, and contextual prompts simultaneously
• Auto-buffer recognition: Supports both USA (pH 4.01, 7.00, 10.01) and NIST (pH 4.01, 6.86, 9.18) standard buffer sets; eliminates manual buffer selection errors
• Tool-free electrode replacement: Modular pH electrode assembly (part #605113) includes O-ring seal, protective cap, and hydration sleeve—designed for rapid field servicing without disassembly tools
• Power-efficient operation: Powered by four LR44 alkaline button cells (included); typical battery life exceeds 35 hours of continuous use with auto-off after 10 minutes of inactivity

Sample Compatibility & Compliance

The YSI pH10 is optimized for aqueous samples with conductivity ≥50 µS/cm and total dissolved solids (TDS) 5% hypochlorite). The instrument conforms to ISO 7888 (water quality — determination of pH), ASTM D1293 (Standard Test Methods for pH of Water), and supports laboratory quality assurance frameworks aligned with ISO/IEC 17025 and EPA Method 150.1. Its GLP functionality—including immutable calibration logs and time-stamped data—facilitates audit readiness for regulated environments operating under ISO 9001 or internal QA/QC protocols.

Software & Data Management

Data export is performed manually via visual transcription from the LCD screen; the pH10 does not feature USB, Bluetooth, or serial connectivity. All stored records—including calibration events—are retained in non-volatile memory independent of battery state. Each entry contains: measured pH value, temperature (°C), date (MM/DD/YYYY), time (HH:MM), and calibration reference buffer ID. This architecture ensures data integrity without dependency on external software or drivers—critical for field use where network access or computer interfaces are unavailable. Calibration logs include the exact date/time of each calibration, number of points used (1-, 2-, or 3-point), and identified buffer pH values—supporting full traceability per GLP principles.

Applications

• Field-based environmental monitoring: Surface water, groundwater, stormwater runoff, and wetland assessments
• Wastewater treatment plant operations: Influent/effluent pH verification, equalization basin control, and disinfection process support
• Aquaculture and hydroponics: Daily pond, tank, or nutrient solution monitoring to maintain optimal biological conditions
• Educational labs: Undergraduate chemistry and environmental science courses requiring portable, safe, and intuitive instrumentation
• Regulatory compliance checks: Rapid verification against discharge permit limits (e.g., EPA NPDES requirements) or drinking water source screening
• Facility maintenance: HVAC cooling tower water, boiler feedwater pre-checks, and cleaning validation rinses

FAQ

What calibration buffers are supported?
The YSI pH10 automatically recognizes both USA (pH 4.01, 7.00, 10.01) and NIST (pH 4.01, 6.86, 9.18) standard buffer sets. No manual buffer code entry is required.
Is the electrode replaceable in the field?
Yes—the pH electrode is a user-serviceable module (YSI part #605113) that can be swapped without tools. The kit includes a new electrode, O-ring, protective cap, and hydration sleeve.
Does the instrument meet IP67 certification standards?
Yes—tested and certified to IEC 60529 IP67: fully protected against dust ingress and capable of withstanding immersion in 1 m of water for 30 minutes.
How is GLP compliance implemented?
GLP functionality includes time-stamped calibration records, immutable storage of buffer IDs and calibration dates, and retention of all 50 measurement entries—even after battery replacement.
What is the warranty coverage?
One-year limited warranty for the meter body; six-month warranty for the pH electrode assembly—commencing from the date of shipment to the end user.