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HI-991405-02 pH/EC/TDS/Temperature Monitor

HI-991405-02 pH/EC/TDS/Temperature Monitor

HI-991405-02 pH/EC/TDS/Temperature Monitor

HI-991405-02 pH/EC/TDS/Temperature Monitor

Complete with pH electrode
2 year manufacturer warranty
£235.80 (exc. VAT) £282.96 (inc. VAT)

The Combo HI-991404 and HI-991405 series of meters from Hanna are designed for continuous, high accuracy pH, EC/TDS and temperature measurements.

HI-991405-02 pH/EC/TDS/Temperature Monitor information

Hanna's extended description

The HI-991405 combo meter 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.

Featuring a large, dual-level, backlit LCD the HI-991405-02 gives you instantaneous reading of pH, EC or TDS and temperature, even from a distance.

At start up, this indicator performs a self-check to assure proper working condition and the stability indicator and hold features prompts 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) is user adjustable for application-specific measurements.

The HI-991405 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 instruments are powered by a 12VDC transformer and are easy to install and use, making them ideal for all continuously monitoring applications.

Order Information:

HI-991405 is supplied with HI-1293D pH electrode, fixed HI-7630 probe, pH and EC calibration solutions, 12 Vdc power adapter and instructions.

Replaceable Electrode – No need to replace the whole meter when the electrode needs replacing. Spare and replacement electrodes are available for this product.

Mains powered - All mains operated equipment is compatible with UK AC voltage and frequency – 230V, 50Hz.


Specifications list


Range - pH 0.0 to 14.0 pH
Range - EC 0.00 to 20.00 mS/cm
Range - TDS 0.00 to 10.00 ppt (g/L)
Range - Temperature 0.0 to 60.0°C (32 to 140°F)
Resolution - pH 0.1 pH
Resolution - EC 0.01 mS/cm
Resolution - TDS 0.01 ppt
Resolution - Temperature 0.1°C (0.1°F)
Accuracy - pH ±0.1 pH
Accuracy - EC/TDS ±2% F.S.
Accuracy - 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, 1 or 2 points with 2 sets of memorized buffers;
EC/TDS: automatic, 1 point
pH Electrode HI-1293D (included)
EC/TDS Probe HI 7630 (fixed)
EC/TDS Conversion Factor adjustable from 0.45 to 1.00
Environment 0 to 50°C (32 to 122°F); RH max 95%
Input Impedance 1012 Ohm
Power Supply 12 Vdc power adapter (included)
Dimensions 160 x 105 x 31 mm (6.3 x 4.1 x 1.2")
Weight 190 g (6.7 oz.)

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