HI 991404-01

pH/EC/TDS/Temperature Monitor low range EC & TDS
This indicator continuously monitors the three most crucial nutrient parameters in hydroponic, greenhouse and horticultural applications.

At startup, HI 991404-01 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.

Specifications
Range pH 0.0 to 14.0 pH
EC 0 to 3999 µS/cm
TDS 0 to 2000 mg/L (ppm)
Temperature 0.0 to 60.0°C / 32.0 to 122.0°F
Resolution pH 0.1 pH
EC 1 µS/cm
TDS 1 mg/L (ppm)
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 1413 µS/cm or 1382 ppm
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.)
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)

Accessories
Electrodes
HI 1293D  Spare pH Electrode for pH Monitors
HI 7630  Conductivity & TDS Probe
for use with HI 983301, HI 983302, HI 991404 and HI 991405
Solutions
HI 70030P  12880 µS/cm EC Solution (25) 20 mL Sachets
HI 70031P  1413 µS/cm EC Solution, (25) 20 mL Sachets
HI 70032P  1382 mg/L (ppm) TDS Solution, (25) 20 mL Sachets
HI 70038P  6.44 g/L (ppt) TDS Solution, (25) 20 mL Sachets
HI 70442P  1500 mg/L (ppm) TDS Solution, (25) 20 mL Sachets
HI 70300M  Electrode Storage Solution
1 x 230 mL bottle
HI 7061M  General Purpose Cleaning Solution
1 x 230 mL bottle
HI 70004P  4.01 pH Buffer Solution, (25) 20 mL
HI 70007P  7.01 pH Buffer Solution
(25) 20 mL sachets
HI 70010P  10.01 pH Buffer Solution
(25) 20 mL sachets