Specification :

HANNA® ' philosophy has always been to satisfy customer needs in a diversity of fields. For this reason, many classes of instruments have been equipped to measure a specific parameter. With this in mind we designed pH 20 and pH 21.

pH measurement accuracy is extremely important where water quality is of primary concern. This includes the food industry, textiles, water analysis, wastewater, as well as engineering, paper mills and tanning.

Compact and simple to use, they perform quick measurements and are suitable for education, where students are often first introduced to measuring instruments.

Both meters provide centesimal resolution. pH 21 also displays readings in mV and can be used for ORP measurements.

To provide the user with more comprehensive information about a sample, measurements can be manually or automatically compensated for temperature while using HI 7662 probe ( optional) .

Specifications :
Range pH : 0.00 to 14.00 pH
Range mV : ± 1999 mV
Range Temperature : 0.0 to 100.0° C
Resolution pH : 0.01 pH
Resolution mV : 1 mV
Resolution Temperature: 0.1° C
Accuracy pH : ± 0.02 pH
Accuracy mV : ± 2 mV
Accuracy Temperature : ± 1° C
Temperature Compensation : manual ( adjustable with arrow keys) or automatic from 0 to 100° C ( with temperature probe)
Probe : HI 1110B pH electrode ( included) ;
HI 7662 : temperature probe ( optional)
pH Calibration : automatic, 1 or 2 point ( pH 4.01, 7.01, 10.01)
Input Impedance : 1012 Ohm
Power Supply : 12 Vdc adapter ( included)
Environment : 0 to 50° C ( 32 to 122° F) ; RH max 95%
Dimensions : 230 x 170 x 75 mm ( 9.1 x 6.7 x 3.0" )
Weight : 500 g ( 1.1 lb.)

Included reagents :
- HI 70004
- HI 70007

Accessories :
Electrodes
HI 1110B : Spare Electrodes
HI 31X1 Series : Laboratory Combination pH and ORP Electrodes
HI 7662 : Temperature Probe
Solutions
HI 70000P : Rinsing Solution 25 x 20 mL sachets
HI 7004L : 4.01 pH Buffer Solution
1 x 500 mL bottle
HI 7007L : 7.01 pH Buffer Solution
1 x 500 mL bottle
HI 7010L : 10.01 pH Buffer Solution
1 x 500 mL bottle
HI 70300L : Electrode Storage Solution
1 x 500 mL bottle
Accessories
HI 710005 : Voltage adapter from 115V to 12 Vdc ( USA plug)
HI 76405 : Electrode Holder