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The HI98191 portable meter represents a significant advancement in measurement technology, offering professionals across various industries unprecedented accuracy in pH, ORP, and ISE measurements. This robust instrument combines cutting-edge technology with durable design to deliver reliable performance in diverse environments.

Engineered to withstand challenging conditions, the HI98191 features an IP67 waterproof rating that ensures functionality even during heavy rainfall or in dusty environments. Its compact housing utilizes impact-resistant materials capable of enduring daily operational stresses, making it equally suitable for laboratory precision work and industrial field applications.

At the core of the HI98191's performance is its high-precision pH measurement system. The instrument incorporates a titanium-bodied HI72911B pH electrode with integrated temperature sensor for automatic temperature compensation. This design provides exceptional chemical resistance against corrosive substances while maintaining measurement accuracy.

The system's intelligent CAL Check™ feature monitors calibration processes by comparing current data with historical calibration records. This function alerts users to potential issues such as electrode contamination, damage, or buffer solution problems. Following calibration, the device displays electrode condition as a percentage based on zero point and slope characteristics.

Supporting five-point calibration with seven preprogrammed standard pH buffers and five customizable options, the HI98191 achieves ±0.002 pH accuracy with 0.001 pH resolution.

Beyond pH measurement, the HI98191 serves as a versatile ISE meter with 15 preprogrammed sensor configurations for common ions including fluoride, chloride, sodium, and potassium. The system automatically applies appropriate ion charge and molar mass parameters when users select specific ISE types from the menu.

The instrument offers extensive measurement units (ppm, ppt, g/L, ppb, μg/L, mg/mL, M, mol/L, mmol/L, % w/v) with an operational range from 1.00×10 ^-7 to 9.99×10 ¹⁰ , accommodating diverse analytical requirements.

• AutoHold function stabilizes readings for recording
• Out-of-range calibration warnings prevent inaccurate measurements
• Manual logging capacity for 300 samples (100 each for pH, mV, and ISE)
• Data transfer capability via micro USB to PC software

Designed for accessibility, the instrument features context-sensitive help accessible through dedicated buttons. The high-contrast LCD remains legible in various lighting conditions with adjustable backlighting. Multilingual support through a combination of physical and virtual keys ensures straightforward operation regardless of user language preference.

The HI98191 comes equipped with a rugged carrying case containing all necessary components for field measurements, including the main unit, electrodes, and sample containers. This comprehensive package enables laboratory-grade precision in any location.

• pH accuracy: ±0.002 with 0.001 resolution
• IP67-rated waterproof construction
• Titanium-bodied pH electrode with temperature compensation
• Five-point calibration capability
• 15 preprogrammed ISE configurations
• 300-sample data storage capacity

The HI98191 serves multiple sectors including environmental monitoring, food safety, pharmaceutical research, industrial process control, agriculture, aquaculture, and education. Its combination of precision, durability, and versatility makes it suitable for both routine quality checks and advanced analytical applications.