HANNA HI9124 Portable PH Meter

The HI 9124 is a waterproof pH meter. A large dual-level LCD displays both the pH and temperature along with an operational guide. Graphic symbols are displayed to help the users during the calibration process. The pH calibration procedure is automatic with five memorized pH buffer values and buffer recognition to simplify the calibration process. This meter utilizes the HI 1230B double junction pH electrode. The double junction helps to minimize junction contamination for accurate, consistent results.

Features: 
User-selectable “ calibration time out” 
Automatic calibration
Automatic Temperature Compensation
Tutorial messages on LCD
BEPS ( Battery Error Prevention System) alerts the user in the event that low battery power could adversely affect readings
Battery % displayed on startup.

Specification:
Range    pH    -2.00 to 16.00 pH
Temperature    20.0 to 120.0°C / -4.0°F to 248.0°F
Resolution    pH    0.01 pH
Temperature    0.1°C / 0.1°F
Accuracy @ 20°C    pH    ±0.01 pH
Temperature    ±0.4°C / ±0.8°F (excluding probe error)
pH Calibration         automatic 1 or 2 point with 5 memorized buffer values (4.01, 6.86, 7.01, 9.18, 10.01)
Offset Calibration         ±1 pH
Slope Calibration         From 80 to 108%
Temperature Compensation         automatic or manual, -20 to 120°C (-4 to 248°F)
pH Electrode         HI 1230B, double junction, gel filled, BNC connector and 1 m (3.3’) cable (included)
Temperature Probe         HI 7662 with 1 m (3.3’) cable (included)
Input Impedance         1012 Ohm
Battery Type / Life         1.5V AAA (3) / approximately 200 hours of continuous use. Auto-off after 20 minutes of non-use (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.)