YSI pH100 Portable pH/ORP/Temperature Meter
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | YSI pH100 |
| Price | Upon Request |
Overview
The YSI pH100 Portable pH/ORP/Temperature Meter is an engineered field-deployable instrument designed for reliable, on-site measurement of pH, oxidation-reduction potential (ORP), and temperature in environmental water quality monitoring applications. Based on potentiometric measurement principles—employing a glass pH electrode (or combination electrode) and reference junction for pH, a platinum or silver/silver chloride sensor for ORP, and a precision thermistor for temperature—the device delivers stable, traceable readings under variable ambient conditions. Its compact, handheld architecture supports single-handed operation, making it suitable for routine sampling in rivers, lakes, wastewater treatment plants, aquaculture systems, and regulatory compliance field surveys. The instrument conforms to fundamental electrochemical measurement standards including ASTM D1293 (Standard Test Method for pH of Water) and ISO 10523 (Water Quality — Determination of pH), and its design facilitates adherence to GLP documentation requirements through automated calibration logging and timestamped data capture.
Key Features
- IP65-rated housing for dust-tight operation and protection against water jets—ideal for outdoor and wet-lab environments
- Simultaneous dual-parameter display: pH/mV with integrated temperature reading
- Automatic buffer recognition for standard pH calibration points (4.01/7.00/10.01 or 4.00/6.86/9.18)
- Auto-identify functionality for electrode offset (±90 mV at pH 7.00/6.86) and slope (±30% at pH 4.00/4.01/9.18/10.01)
- Auto-hold mode: locks display when measurement stability is detected per user-defined threshold
- Configurable temperature compensation: automatic (–10 °C to 120 °C) or manual input
- Acoustic key feedback for tactile confirmation without visual verification
- Low-battery indicator and real-time electrode performance diagnostics (slope % and offset mV)
- One-button calibration with full calibration history stored onboard (no external software required)
Sample Compatibility & Compliance
The YSI pH100 is optimized for aqueous samples across natural, municipal, and industrial water matrices—including freshwater, seawater (with appropriate ORP electrode), effluent, and process streams. It accepts interchangeable electrodes: pH/temperature combination probes (e.g., YSI 100-1, 100-4), dedicated ORP sensors (115-1), standalone temperature probes (130-1), and simulation tools (110-1) for field verification. All compatible electrodes meet IEC 60746-2 (Electrochemical analyzers — Part 2: pH meters) for metrological integrity. The system supports calibration traceability to NIST-traceable buffer standards (e.g., YSI 3821-1, 3822-1, 3823-1) and redox standards (Zobell solution, 3682). While not certified for FDA 21 CFR Part 11, its audit-ready calibration logs and immutable timestamping align with GLP/GMP field documentation expectations.
Software & Data Management
The pH100 operates as a standalone instrument with no PC connectivity or proprietary software dependency. All calibration events—including date/time stamp, buffer IDs, measured mV values, calculated slope/offset, and operator notes—are automatically archived in non-volatile memory. Up to 20 calibration records are retained; older entries overwrite upon new calibration. Data export is manual via visual transcription. For laboratories requiring electronic records, the instrument’s deterministic output format (pH ±0.01, mV ±1, °C ±0.1) ensures compatibility with LIMS or Excel-based QA/QC workflows. Firmware updates are not field-upgradable; units ship with production-version firmware validated per YSI’s internal quality control protocol (ISO 9001:2015 certified manufacturing).
Applications
- Regulatory field monitoring per EPA Methods 150.1 (pH) and 150.2 (ORP) for NPDES permit compliance
- Wastewater influent/effluent characterization in municipal and industrial treatment facilities
- Aquaculture health management—tracking pH drift and redox shifts linked to nitrification efficiency
- Groundwater and surface water quality assessments in environmental site investigations
- Educational laboratory instruction for electrochemical fundamentals and calibration best practices
- Process control support in food & beverage, pharmaceutical, and chemical manufacturing where portable verification is required
FAQ
What is the operating temperature range for the instrument itself?
The meter functions reliably between 0 °C and 50 °C ambient temperature, with relative humidity up to 95% non-condensing.
Does the pH100 support automatic temperature compensation during measurement?
Yes—ATC is enabled by default using the integrated thermistor in compatible combination electrodes; manual TC input is also supported for use with non-ATC probes.
How many calibration points can be stored, and what data is retained?
Each calibration event stores date/time, selected buffer pH values, measured mV, calculated slope (%), offset (mV), and electrode ID if tagged; up to 20 sessions are retained.
Is the unit compliant with IP65 for immersion or submersion?
IP65 certifies protection against dust ingress and low-pressure water jets from any direction—it is not rated for submersion or prolonged immersion.
Can the pH100 be used with non-YSI electrodes?
Only electrodes with BNC connectors and standard potentiometric output (±1500 mV) and thermistor resistance curves matching YSI’s 10 kΩ @ 25 °C specification are functionally compatible; full feature support (e.g., auto-identify) requires YSI-branded probes.
