Hanna HI991300 Portable pH-EC-TDS-°C Meter

Overview

The Hanna HI991300 is a rugged, field-ready portable multiparameter meter engineered for simultaneous, high-reliability measurement of pH, electrical conductivity (EC), total dissolved solids (TDS), and temperature in aqueous solutions. Designed around electrochemical potentiometric (pH) and conductometric (EC/TDS) principles, the instrument employs a single integrated DIN-style probe—HI12883—with built-in temperature sensor and microelectronics amplifier to ensure precise, real-time automatic temperature compensation (ATC) across the full operational range (−5.0 to 105.0 °C). Its dual-line LCD display presents both primary and secondary parameters concurrently (e.g., pH and °C, or EC and °C), eliminating manual unit switching during routine monitoring. The device complies with fundamental metrological requirements for field-deployable instrumentation used in environmental sampling, hydroponics, aquaculture, wastewater pre-screening, and educational laboratories where portability, repeatability, and traceable calibration are essential.

Key Features

• Integrated HI12883 combination electrode featuring glass pH sensing element, stainless-steel EC/TDS cell, NTC thermistor, and onboard signal amplifier—enabling stable, low-noise measurements without external modules.
• Sensor Check™ diagnostic function allows users to verify electrode health—including glass membrane integrity and reference junction status—directly on-device prior to calibration or measurement.
• Auto-recognition calibration: supports 1–2 point pH calibration using either NIST-traceable buffers (pH 4.01/7.01/10.01) or DIN-compliant buffers (pH 4.01/6.86/9.18); EC/TDS calibration uses factory-programmed 1413 µS/cm (EC) and 1382 ppm or 1500 ppm (TDS) standards.
• Adjustable TDS conversion factor (0.45–1.00) and β temperature compensation coefficient (0.0–2.4 %/°C) permit optimization for diverse sample matrices including nutrient solutions, brackish water, and industrial effluents.
• BEPS (Battery Error Prevention System) provides visual low-battery alert (flashing icon at <5% capacity) and prevents erroneous readings due to voltage drop.
• IP67-rated enclosure ensures dust-tight operation and immersion resistance up to 1 m for 30 minutes—validated for use in humid greenhouses, outdoor ponds, and wet laboratory benches.
• Dual-button interface with HOLD function and stability indicator simplifies operation for technicians with minimal training; no menu navigation required for daily use.

Sample Compatibility & Compliance

The HI991300 is validated for use with clean to moderately fouling aqueous samples, including freshwater, nutrient solutions, irrigation water, aquarium water, and non-aggressive process streams. It is not intended for viscous, highly particulate, or strongly oxidizing media without appropriate probe cleaning protocols. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, its calibration traceability aligns with common QA/QC practices in environmental and agricultural labs. The built-in calibration verification prompts support GLP-aligned documentation when paired with lab notebooks or LIMS entries. The HI12883 probe meets IEC 60746-2 (pH) and IEC 60746-3 (conductivity) general performance guidelines for portable electrochemical sensors.

Software & Data Management

The HI991300 operates as a standalone field instrument with no embedded data logging or Bluetooth connectivity. All measurements are displayed in real time and must be manually recorded. However, its consistent output format—two-parameter concurrent readout with clear unit labeling—and stable endpoint detection (via disappearing stability icon) facilitate accurate transcription into electronic lab notebooks (ELNs), spreadsheets, or regulatory reporting templates. For facilities requiring audit trails, the device’s BEPS alerts, auto-shutdown timestamps (configurable at 8 min, 60 min, or OFF), and repeatable calibration routines support procedural compliance under ISO 17025 Clause 7.7 (Sampling) and USP Analytical Instrument Qualification frameworks.

Applications

• Hydroponic and aeroponic system monitoring: real-time tracking of pH drift and nutrient concentration (EC/TDS) across growth cycles.
• Aquaculture management: rapid assessment of pond or tank water quality prior to feeding or treatment interventions.
• Environmental field surveys: screening of surface water, groundwater, and stormwater runoff for regulatory pre-clearance.
• Educational laboratories: hands-on instruction in electrochemical fundamentals, calibration theory, and temperature compensation effects.
• Food & beverage preprocessing: verification of rinse water pH and sanitizer solution conductivity before equipment sanitation.
• Wastewater pretreatment: quick checks of influent acidity and ionic load prior to biological treatment stages.

FAQ

What calibration buffers are compatible with the HI991300?
The meter supports auto-recognition of standard pH buffers: pH 4.01, 7.01, and 10.01 (NIST traceable) or pH 4.01, 6.86, and 9.18 (DIN). For EC/TDS, it recognizes HI7031 (1413 µS/cm), HI7032 (1382 ppm, 0.5 factor), and HI70442 (1500 ppm, 0.7 factor).
Can the HI991300 measure ORP or ion concentration?
No. It is dedicated to pH, EC, TDS, and temperature only. ORP and ion-specific measurements require separate meters and specialized electrodes.
Is the HI12883 probe replaceable and serviceable?
Yes. The HI12883 is a consumable, field-replaceable probe with a typical service life of 12–18 months under normal use. Hanna offers replacement probes and cleaning/reconditioning solutions (e.g., HI7061L, HI7066L).
Does the meter comply with IP67 when the probe is connected?
Yes. The DIN connector features an O-ring sealed housing; full IP67 rating is maintained with the probe attached and properly seated.
How does temperature compensation differ between pH and EC modes?
pH uses fixed Nernstian slope compensation (0.1984 mV/pH/°C at 25°C), while EC applies user-selectable linear β compensation (0.0–2.4 %/°C) to match solution-specific thermal response profiles.