• Continuously monitor pH,TDS and Temperature
• Simple one-point calibration
• Automatic temperature compensation

The new Combo HI 991404 & HI 991405 series meters from Hanna are designed for continuous, high accuracy pH, EC/TDS and temperature measurements. These microprocessor indicators continuously monitor the three most important nutrient parameters in hydroponics, greenhouses and horticultural applications with a single instrument. These indicators feature a large, dual-level, back-lit LCD to give you instantaneous readings of pH, EC or TDS and temperature even from a distance. At startup these indicators perform a self-check to assure proper working condition. HI 991404 & HI 991405 also have a stability indicator and hold feature to prompt the user when to take the reading and freezes the display for easy and accurate recording. Calibration and temperature compensation is automatic, while the EC/TDS conversion factor and temperature coefficient (ß) are user adjustable for application-specific measurements. These instruments are supplied with an advanced, non-clogging double junction pH electrode and a rugged conductivity probe that will withstand even the most aggressive environments. The instruments are powered by a 12VDC transformer and are easy to install and use making them ideal for all continuous monitoring applications.HI 991404 is supplied complete with HI 1293D pH electrode, fixed HI 7630 probe, pH and EC calibration solutions, 12 Vdc power adapter and instructions.

Specifications:
Range EC 0 to 3999 µS/cm Range TDS 0 to 2000 ppm Range pH 0.0 to 14.0 Range Temp 0.0 to 60.0°C or 32.0 to 140.0°F Resolution EC 1 µS/cm Resolution TDS 1 ppm Resolution pH 0.1 Resolution Temp 0.1°C or 0.1°F Accuracy EC/TDS ±2% F.S. Accuracy pH ±0.1 Accuracy Temp ±0.5°C or ±1°F Typical EMC Deviation EC/TDS ±2% F.S. Typical EMC Deviation pH ±0.1 Typical EMC Deviation Temp ±1°C or ±2°F Temp. Compensation pH: automatic; EC/TDS: automatic with ß=0.0 to 2.4%/°C Calibration pH 1 or 2 points with 2 sets of memorized buffers Calibration EC/TDS Automatic at 1 point Electrode HI 1293D pH electrode (included) Probe HI 7630 EC/TDS probe (included) EC/TDS Conversion Factor 0.45 to 1.00 (CONV) Battery Type / Life External 12 VDC (included) Environment 0 to 50°C (32 to 122°F); RH 100% Dimensions 165 x 110 x 35 mm (6.5 x 4.3 x 1.3”) Weight 300 g (10.6 oz)

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