This indicator continuously monitors the three most crucial nutrient parameters in hydroponic, greenhouse and horticultural applications.

At startup, HI 991405-02 performs a self-check to assure proper working condition. The stability indicator and HOLD function lets the user know when to take readings and freezes the reading on display for easy and accurate recording.

This instrument is supplied with a non-clogging double junction pH electrode as well as a rugged conductivity probe that will withstand even the most aggressive environments. The 12 VDC adapter makes these instruments ideal for all continuous monitoring applications.

Order Information: HI 991405-02 (230V) is supplied with HI 1293D pH electrode, HI 7630 EC probe (fixed), HI 70004 pH 4.01 buffer solution sachet, HI 70007 pH 7.01 buffer solution sachet, HI 70030 1288 mS/cm calibration solution sachet, 12 VDC adapter and instructions.

Specification :

Range	pH	0.0 to 14.0 pH
	EC	0.00 to 20.00 mS/cm
	TDS	0.00 to 10.00 g/L (ppt)
	Temperature	0.0 to 60.0°C / 32.0 to 122.0°F
Resolution	pH	0.1 pH
	EC	0.01 mS/cm
	TDS	0.01 g/L (ppt)
	Temperature	0.1°C (0.1°F)
Accuracy @ 20°C	pH	±0.1 pH
	EC/TDS	±2% F.S.
	Temperature	±0.5°C (±1°F)
Temperature Compensation	pH	automatic
	EC/TDS	automatic with ß adjustable from 0.0 to 2.4%/°C
Calibration	pH	automatic, one or two points with auto-buffer recognition
	EC/TDS	automatic, one point at 12.88 mS/cm or 6.44 g/L (ppt)
Probes	pH	HI 1293D PEI body, pre-amplified pH electrode with 1/2” NPT pipe thread, DIN connector and 2 m (6.6’) cable (included);
	EC/TDS	HI 7630 conductivity probe with 1/2” NPT pipe thread and 2 m (6.6’) cable (fixed)
TDS Factor		adjustable from 0.45 to 1.00
Environment		0 to 50°C (32 to 122°F); RH max 95% non-condensing
Input Impedance		10¹² Ohm
Power Supply		12 VDC adapter (included)
Dimensions/Weight		160 x 105 x 31 mm (6.3 x 4.1 x 1.2) / 190 g (6.7 oz.)