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Hand Held Digital pH Meter - Model HH4-PH

Supplier: Amalgamated Instrument Co

The Intelligent HH4-PH Hand Held Digital pH meter is designed and manufactured to provide a rugged and reliable instrument for industrial and laboratory applications.


The HH4 Digital pH meter is intelligent yet simple to operate. The instrument may be cycled between pH, millivolts and temperature simply by the push of a button. A hold pushbutton allows the display to be held at the current reading for taking notes and logging purposes.

Calibration is simplified by a pushbutton sequence which allows a single point or two points to be entered into the calibration memory.

The non volatile memory stores the previous buffer values making future calibrating even faster. A unique display of the electrode slope allows you to monitor the condition of the pH electrode.

The programmable digital filter improves stability by smoothing out short term interference - often associated with induced cable noise when stirring liquids.

An automatic switch off function has been integrated into the design to switch the instrument off after a programmable preset time period - thus increasing the battery life.

Features of Hand Held Digital pH Meter - Model HH4-PH:

  • Pushbutton calibration and setup
  • Displays pH to 0.01
  • Displays millivolts to 1mV
  • Displays temperature to 0.1°
  • Displays pH electrode slope
  • Automatic or manual temperature compensation for pH
  • Digital filter improves stability
  • Display hold button
  • Rugged construction
  • Automatic low battery indication
  • 9V 216 type battery supplied
  • Padded carry case (optional)
  • Programmable auto turn off
  • 2 year guarantee

Specifications of Hand Held Digital pH Meter - Model HH4-PH:

  • pH input: Any electrode where E°=7
  • pH range: 0.00 pH to 14.00 pH
  • millivolt input: -2V to 2V nominal
  • millivolt range: -1999mV to 2000mV
  • Temperature input: LM335 semiconductor sensor
  • Temperature range: -50 to 150°C or -60 to 300°F
  • Temperature units: Selectable °C or °F
  • Accuracy: Better than 0.2% of FS (pH)
  • Conversion method: Dual slope ADC,
  • 4 samples per second
  • Microprocessor: MC 68HC05C8 CMOS
  • Ambient temp: 0 to 50°C
  • Humidity: 5 to 95% non condensing
  • Display: LCD 4 digit 12.7mm
  • Battery: 9V 216 type battery
  • (Alkaline recommended)
  • Quiescent current: 10uA maximum
  • Operating current: 10mA maximum

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