HANNA HI98140N Portable pH Meter

These instruments feature IP 67 waterproof protection, GLP ( Good Laboratory Practice) capabilities and use HANNA® ' intelligent electrodes. These electrodes incorporate a chip which memorizes the calibration data performed with a specific instrument. When the " intelligent electrode is attached to the meter again, it is automatically recognized. This technology allows the operator to optimize time and efficiency with unsurpassed safety. It avoids erroneous measurement readings in the event that the pH electrode is substituted after calibration. This electrode series are equipped with a built-in temperature sensor; no need for an additional temperature probe here! 
HI 98140N and HI 98150N feature all the most advanced features of laboratory pH meters. Moreover they are provided with a dual level LCD which enhances operability in dimly lit locations. By pressing a button, these meters can store up to 500 measurements complete with date and hour. Stored data can be displayed later or downloaded to a
computer through an RS232 serial port and the HI 92000 Windows® compatible software.

Features: 
Slim Design
Flat Back for Better Grip
New Larger LCD
Tutorial messages displayed
Electrode Diagnostics
Up to 5 point Calibration
USB Port
Increased mV Accuracy
Increased Temperature Accuracy
Faster and Easier Battery Replacement

Specification:
Range    pH    -4.0 to 20.0 pH; -4.00 to 20.00 pH
Temperature    -20.0 to 120.0°C (-4.0 to 248.0°F)
Resolution    pH    0.1 pH; 0.01 pH
Temperature    0.1°C (0.1°F)
Accuracy @ 20°C    pH    ±0.1 pH; ±0.01 pH
Temperature    ±0.2°C (±0.4°F) excluding probe error
pH Calibration         up to three point calibration with seven standard buffers available (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and two custom buffers
Temperature Compensation         automatic, -20 to 120°C (-4 to 248°F)
pH Electrode         HI 1618D PEI body, pre-amplified pH electrode with “SMART” technology, internal temperature sensor, DIN connector and 1 m (3.3’) cable (included)
PC Connection         opto-isolated USB with optional HI 92000 software
Power Supply         1.5V AAA (3) / approximately 200 hours of continuous use without backlight (50 hours with backlight). User selectable auto-off (5, 10, 20, 60 minutes or can be disabled)
Environment         0 to 50°C (32 to 122°F); RH max 100%
Dimensions         185 x 72 x 36 mm (7.3 x 2.8 x 1.4’’)
Weight         300 g (10.6 oz.)