Bench pH Meters CalibrationCheck

Item #: PH-221
Manufacturer: Hanna Instruments
from: $464.00 sale: $380.48
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Product Description

HI 221 is Logging microprocessor-based pH/ORP/temperature bench meters with Calibration Check.

Calibration Check performs a set of diagnostic tests during calibration using the history of electrode slope and offset to detect problems that can cause loss of accuracy.

Calibration Check Features are:

  • Enhanced Calibration Messages
    During calibration the user is warned if one or more parameters are not suitable to performed an accurate calibration.
  • Electrode Condition on LCD Display.
    Determined from the electrode offset and slope.
  • Electrode response on LCD Display
    Determined from electrode performance during calibration.
  • Calibration Alarm Time Out
    Can be programmed from 1 to 7 days or can be disabled.

Other features include:

One or two point calibration with seven memorised buffers (1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45 pH), logging up to 100 sample, last calibration date and data (GLP), pH reading with manual or automatic temperature compensation and PC software interface.


  • Range: -2.99 to 16.00 pH, -20.0 to 120.0°C
  • Resolution: 0.01pH, 0.1°C
  • Calibration Check: Yes
  • Computer Interface: Opto-isolated RS232
  • Logging: 100 points
  • Power Supply: 12 VDC adapter (included)
  • Dimensions: 240 x 182 x 74 mm (9.4 x 7.1 x 2.9”)
  • Warranty: 2 years