The new Combo HI 991404 is designed for continuous, high accuracy pH, EC/TDS and temperature measurements. This microprocessor indicator continuously monitors the three most important nutrient parameters in hydroponics, greenhouses and horticultural applications with a single instrument and features 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, a self-check assures proper working condition. The HI991404 has 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. This instrument is supplied with an advanced, non-clogging double junction pH electrode and a rugged conductivity probe that will withstand even the most aggressive environments. The power source is a 12 volt DC transformer. Easy installation and use make it ideal for all continuous monitoring applications.

The HI991404 is supplied complete with HI 1293D pH electrode, HI 7630 EC/TDS/temp. probe (fixed), 12 VDC adapter, packets of pH4 & pH7 buffers (20 mL each) & 1413 µS/cm EC solution and instructions.

NOTE:  The HI9914-04 should not be used in the vicinity of digital electronic lighting ballasts, use the HI981504/5 instead

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Caprock Developments Inc./PO Box 95/Morris Plains, NJ 07950 USA 
Since 1953.  Delivery available to all points worldwide.
Tel. (800)-222-0325 / (973)-267-9292 from 9:00AM to 5:00PM Eastern Time / Fax (973)-292-0614