The HI-991300 is a light weight, portable pH, conductivity and temperature meter for portable applications requiring both a pH and conductivity measurement. Applications include measurements for greenhouses irrigation, hydroponics and groundwater monitoring from agriculture nutrient pollution. The HI-991300 meter features two operation button and is simple to use. All operations and settings, including calibration buffers and temperature scale selections, are made through these two buttons. It has a waterproof and compact casing rated for IP67 conditions and a large tri-line display. The meter has automatic pH calibration at one or two points and a single conductivity calibration. Other user selectable features include different TDS factors from 0.45 to 1.00, and a range of temperature coefficients from 0.0 to 2.4% for better conductivity or TDS solution temperature compensation.

The meter is supplied with a multi-parameter probe specifically designed for this meter. The HI-12883 multi-parameter probe, incorporates a domed shaped pH bulb rated from 0 to 13 pH, a single junction Ag/Cl reference electrode with gelled electrolyte and a retractable cloth wick junction, a graphite EC/TDS cell, and a temperature sensor in one convenient, rugged polypropylene body. In addition, to ensure against interference from transient electrical noise to pH, a solid-state pre-amplifier is integrated into the probe. The probe is rated from 0 to 50°C.

• Simultaneous, pH, EC/TDS and temperature measurements on a large three line LCD display
• Selectable temperature unit
• pH electrode condition display
• mV of pH measurement for electrode check
• Last calibration points pH and EC
• HI-12883 dedicated pH/EC/TDS/temperature probe
• Probe quick connect system
• Battery life indication and low battery detection
• Auto-off function
• Keystroke confirmation tone
• Waterproof casing IP67
• Supplied with:
• HI-12883 pH/EC/TDS probe with built-in temperature sensor, DIN connector and 1mm cable
• pH 4.01 & 7.01 buffer sachets
• HI-70031 1413µS/cm sachet
• HI-70032 1382ppm sachet
• 2 x HI-700601 electrode cleaning solution sachet
• 100mL beaker
• 3 x alkaline battery 1.5V AAA
• Rugged carrying case
• Calibration certificate of meter
• Calibration certificate of probe
• Instruction manual