Hanna Instruments

Scientific Equipment

HI-9914-2 Wall Mounted pH and Conductivity Controller

HI-9914-2 Wall Mounted pH and Conductivity Controller

Hanna HI-9914-2 Wall Mounted pH and Conductivity Controller

HI-9914-2 Wall Mounted pH and Conductivity Controller

Use with HI-3001D EC probe
2 year manufacturer warranty
£639.50 (exc. VAT) £767.40 (inc. VAT)

HI-9914 is a wall mounted fertigation controller, designed to meet specific process control requirements in agricultural, horticultural and hydroponics applications. The controller is provided with two measuring channels, one for pH and one for conductivity.

HI-9914-2 Wall Mounted pH and Conductivity Controller information

Hanna's extended description

The conductivity probe is designed with a built-in temperature sensor which allows the controller to automatically compensate for the temperature effect. The differential input and the use of a Matching Pin prevent grounding problems and thus ensure longer life to the pH electrode.

The controller includes two regulators for pH and conductivity, that can be adjusted from the front panel by setting two independent thresholds. The conductivity and pH controls are time separated and a timed operation mode to avoid overdosing of fertiliser or acid. The controller status is indicated by LEDs on the front panel. Moreover, the equipment is provided with a three-level sensor, to control the water level, the alarm condition and irrigation sequences.

Readings are displayed simultaneously on two independent LCDs with backlight.

The instrument also features an alarm system, which is activated when an unusual working condition occurs. A humidity detector can be used to stop the controller if any leakage is detected. Water nozzle, circulation pump, feeding pump and alarm are equipped with relays.

Water Resistant – Can withstand temporary exposure to water, but should not be submerged or washed under running water.


Specifications list


Range 0.00 to 10.00 mS/cm; 0.00 to 14.00 pH
Resolution 0.01 mS/cm; 0.01 pH
Accuracy ±5% F.S.; ±0.02 pH
Calibration manual, 1 point for EC with slope trimmer; 2 point for pH with offset and slope trimmers
Setpoint 2, selectable from 0.50 to 10 mS/cm and from 0.5 to 14.0 pH
Analog Output 0-5 V ±5% (0.5V/mS); 0-7 V ±5% (0.5 V/ pH)
Timer Range adjustable from 1 to 10 minutes
Feed OK Output 12 V, 15 mA
Humidity Sensor activated if resistivity is below 220 Kohm
Water Nozzle Output 2A, 220 V relay
Circulation Pump Output 2A, 220 V relay
Feeding Pump Output 2A, 220 V relay
Alarm Output 2A, 220 V relay
Water Level Inputs contact type water level sensor
User Input contact type switch
External FILL Button contact type push-button
Power Supply 110/115 Vac ±10% or 220/240 Vac ±10%; 50/60 Hz
Environment -10 to 50° (14 to 122°F); RH max 95% non-condensing
Dimensions 221 x 181 x 90 mm (8.7 x 7.1 x 3.5")
Weight 1.75 kg (3.9 lb.)

Downloadable Manuals


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Product Literature

literature - PDF

Hanna Instruments Literature

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