HI 4222 is a dual-channel, research-grade laboratory pH Bench Meter with a backlit 240 x 320 dot-matrix color screen and millesimal measuring resolution. Features include auto-logging and real-time graphic displays, auto-end point mode and a fully customizable SETUP button. This unit allows for automatic ( ATC) or manual ( MTC) temperature compensation.

For accountability, on-screen GLP data capture contains calibration information, including buffer values and expiration date, concurrent with measurement readings and logged graph data. For ISE measurements, an ionic strength constant value is stored with GLP data. During ISE Mode, the user has a choice of several incremental methods. With the option to choose up to 5 calibration points for pH - selected from a list of 5 custom and 8 memorized buffers - the system can be fitted to any desired measuring range.

Our exclusive Calibration Checkâ„¢ diagnostics system determines the quality and condition of the electrode and buffer groups during calibration, and keeps you informed. An enhanced warning system, with acoustic signals, alerts the user when measuring is outside of the calibration range. This system also reminds the user when a new calibration is due, or when the wrong buffer is being employed during calibration. This unit can be given a unique ID number.

The user may consult the on-board contextual help from any mode simply by pressing the HELP menu. All the features are available in English, Italian, French and Spanish. Galvanically isolated channels HI 4222 eliminates interference and instability. Connect HI 4222 to a PC via the opto-isolated USB and RS232 ports and utilize the HI 92000 software Windows® compatible software to capture and store all your data.

Specifications :
Range pH : -2.0 to 20.0; -2.00 to 20.00; -2.000 to 20.000 pH
Resolution pH : 0.1 pH; 0.01 pH; 0.001 pH
Accuracy pH : ± 0.1 pH; ± 0.01 pH; ± 0.002 pH
Range mV : ± 2000 mV
Resolution mV : 0.1 mV
Accuracy mV : ± 0.2 mV
Range ISE : 1 x 10-7 to 9.99 x 1010 concentration
Resolution ISE : 1; 0.1; 0.01 concentration
Accuracy ISE : ± 0.5% ( monovalent ions) ; ± 1%
Range Temperature : -20.0 to 120° C; -4.0 to 248.0° F; 253.15 to 393.15K
Resolution Temperature : 0.1° C; 0.1° F; 0.1K
Accuracy Temperature : ± 0.2° C; ± 0.4° F; ± 0.2K
Calibration pH : Automatic up to 5 points with 8 memorized values ( pH 1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) + 5 custom buffers
Calibration ISE : Automatic, up to 5 points with 5 standard + 5 custom values
Calibration Temperature : 3 points
Relative mV Offset Range : ± 2000 mV
Input Channel( s) : 2 pH/ mV/ ISE
Calibration Check : pH electrode and buffer condition
Temperature compensation pH : Automatic or manual from -20.0 to 120.0° C ( -4.0 to 248.0° F)
Log-On-Demand : 10 Lots, 5000 samples per lot
Auto Endpoint : Yes
PC Connection : Opto-isolated USB and RS232
Display : 240 x 320 dot-matrix color LCD with on-screen help, graphing, language selection and custom configuration
Power Supply : 12 VDC adapter ( included)
Dimensions : 159 x 230 x 93 mm ( 6.3 x 9.1 x 3.7" )
Weight : 800 g ( 1.8 lb.)