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SKU HI9910-2 Kategorien ,

Industrial pH Controller (wall mounted) - HI9910-2

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HI9910 is an industrial pH controller with a single set point for the proportional dosage of acid or alkaline solutions. A pump or electrovalve can be wired directly to the controller and be powered through the terminals.
  • Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption
  • User selectable isolated output signal between 0-20 or 4-20 mA
  • See the controller’s status, even from a distance, by observing the dosage or alarm LED’s

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Triple Contact Alarm System

When activated, the alarm contacts will open or close, triggering the mechanism of your choice, whether a buzzer, light or any other electrical device. The alarm is activated when the measurements stray away from the set point by a predetermined value in the 0.5 to 2.5 pH range.

BNC Connector

  • The electrodes can be installed quickly and easily. Simply plug the universal BNC connector into the socket and twist it into a secured position.
  • Proportional Control

    • The proportional control can be fine tuned through two dials on the front panel. The time cycle is adjustable from 0 to 90 seconds and the proportional band from 0.0 to 2.0 pH.

Fail Safe Alarm System

Hanna’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel of the controller.

Temperature Compensation

A dial on the front panel renders manual temperature compensation fast and easy. For automatic temperature compensation hook up a three wire Pt100 to the controller.

Durable Construction

This controller is housed in a rugged, modular, fiber-reinforced ABS housing.




0.0 to 14.0 pH


0.1 % pH


±0.2 pH


manual, 1 point through CAL (offset) trimmer

Dosing Relay 

maximum 2A (fuse protected), 250 Vac, 30 VDC

Dosing Selection

acid or alkaline
contact open=acid dosage=relay ON if measurement > setpoint
contact closed=alkaline dosage=relay ON if measurement < setpoint


adjustable from 0 to 14 pH


adjustable, typically from 5 to approximately 30 minutes

Input Impedance

10¹² Ohm

Power Supply 

BL981411-0: 12 VDC adapter (included);
BL981411-1: 115/230 VAC; 50/60Hz


83 x 53 x 99 mm (3.3 x 2.1 x 3.9’’)


BL981411-0: 200 g (7.1 oz.);
BL981411-1: 300 g (10.6 oz.)

Ordering information

BL981411-0 (12 VDC) and BL981411-1 (115V) are supplied with mounting brackets, transparent cover, and instruction manual.




0.0 to 14.0 pH


0.01 % pH


±0.02 pH


through “OFFSET” and “SLOPE” trimmers (max. ±1.5 pH for offset and 80% to 110% for slope)

Temperature Compensation

automatic from 0 to 50°C with Pt100 probe or manual from -10 to 80°C

Alarm Relay Setpoint

from 0.00 to 14.00 pH with “COARSE” and “FINE” trimmers with “ACID” or “ALK” (alkaline) selection

Alarm Relay Range

terminals can be configured as normally open or normally closed (isolated output max. 2A, max. 240V, resistive load, 1,000,000 strokes). The alarm is activated if pH varies by more than user selectable interval (0.5 to 2.5 pH) from set point or due to ove

Dosing Control

relay terminals (115 to 240V, max.2A,1,000,000 strokes) are activated when pH exceeds the set point with “ACID” dosage or falls below the set point with “ALK” selection (alkaline dosage)

Analog Output Signal

user selectable 0 to 20 mA or 4 to 20 mA over the 0-14 pH range with isolated output


fiber-reinforced, self-extinguishing ABS

Power Supply 

±10% 115 VAC; 50/60 Hz


-10 to 50°C (14 to 122°F); RH max 95% non-condensing


221 x 181 x 86 mm (8.7 x 7.1 x 3.4’’)


1.6 kg (3.5 lb.)

Zusätzliche Informationen

Zusätzliche Information




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